universal basic income: an introduction

The idea of a universal basic income (UBI) has been floating around for some decades, but the noises have grown louder in recent years, it seems to me, as industry and agriculture have become increasingly mechanised, at least in the developed world. This means, I’d suppose, that those with the capital to harness the technology for profitable ventures would be more able to concentrate the wealth in their hands (and in the hands of venture capitalists who back them) while the less advantaged who’ve previously relied on working for a living are left at a loss, in more ways than one.

Right now I know very little about UBI. How would it be funded, is it applied nation by nation, are there different projected plans available, has it ever been tried anywhere, what are the upsides and downsides, who’s advocating it? And so on. There are probably more questions than answers at the moment, but considering the huge gaps occurring between the rich and the poor in developed countries, and the rise of homelessness often going hand in hand with rises in GDP, this kind of apparently simplified safety net is surely at least worth a look.

First, without doing any research, I assume that ‘universal’ really means ‘national’ or ‘state’ – we’re not going to get this organised on a global scale. The second assumption is that such payments would have to come out of the taxation system, as I can’t think of any alternative. This would seem to add up to quite a bill, depending on the amount allocated on a per capita basis. There would also be offsets, such as the elimination of much welfare bureaucracy, which would perhaps throw more people out of work. There are also arguments as to whether this would amount to ‘sit down money’, or would incentivise people to be more active in business and creative fields. 

So do we have any evidence about costs and benefits? Has this approach been trialled anywhere? Well interestingly, a small-scale 3-year trial is being carried out in Fife, Scotland, very close to where I was born in Dundee. Reporting from June 2020 has it that the trial, involving only 17,000 Scots, involves a one year preparation period and an estimated minimum cost of £186m, so it will be a while before we see any results, if indeed the plan goes ahead. There are plenty of naysayers of course.

A more comprehensive test is already under way in Spain, where some 850,000 households have been supported with a ‘guaranteed minimum income’ by the leftist government since June 2020, at an estimated cost of 3 billion euros annually. This isn’t strictly a trial – the government plans to maintain the system indefinitely (meaning probably until a right-wing government takes over), but of course they’ll be monitoring it in terms of reducing poverty and boosting employment, health and other indices.

The current pandemic, unsurprisingly, has brought the UBI and it variants to the forefront once more, but it has been mooted, and tried to varying degrees, in the past. Brian Donaghy, in his booklet on basic income, gives a brief overview of these small-scale trials, in Canada, Switzerland, Finland, Namibia, Kenya and the USA. Unfortunately some of them were torpedoed by political opponents before much meaningful data could be gleaned, but one of the most interesting findings they had in common was an increased sense of good health and well-being felt by recipients. 

The fact is that, over recent decades, the term ‘welfare’ has developed distinctly negative connotations. Making the income truly ‘universal’ within a whole nation or state, rather than targeting those below a certain income level, as is the case in the Spanish trial, is really the only way to remove the idea of ‘welfare’ from these payments. 

Now, in order to understand the financial and taxation implications of a UBI, I need to undertake a steep learning journey. I may also go into some personal revelations to make it clear why these kinds of payments are of particular interest to me. 

So, having read Brian Donaghy’s booklet, A basic income for Australia, I have more questions than answers. Donaghy also makes it clear that convincing politicians of the justice of such a system will be an uphill battle, especially in dual party-style democratic countries, when both sides of the political fence are more dedicated to opposing each other than to working together, which would be essential for such a system to work. 

Despite the naysayers, the UBI and its variants refuses to die, in fact it’s finding more interest now than ever before. In spite of this, it hasn’t really been given a full trial anywhere, and the public as well as politicians are very divided on the subject.

But I need to dive in on how it might work in Australia, relying on Donaghy’s booklet.

According to the Australian Bureau of Statistic figures for 2018, average annual full-time adult earnings were fractionally under $90,000 gross – an eye-watering figure to me. Donaghy sets the UBI, for calculation’s sake, at about $24,500 annually – which is approximately that of the current aged pension, and associated supplements. So this income rises to $114,500, with the extra – the UBI (which every adult gets) – being tax free. 

But here’s where Donaghy – who’s an experienced finance journalist – leaves me behind: 

The UBI replaces the existing tax-free allowances but there are no longer individual tax allowances or rebates. 

As a perennially poor person I’ve generally paid too little in tax to worry about such things. So what is a tax-free allowance? My guess is that it includes Jobseeker, AUSTUDY, the aged pension, and such payments as carer’s and disability allowances. His remark about individual allowances covers particular payments that are distinct from these general payments. 

Donaghy then goes into tax rates, which I’ve never had to think about. What I can glean is that we have sliding tax rates, like every other country. According to the Australian Tax Office (ATO) our tax rates for the 2020-21 financial year are: no tax on annual income $18,200 or under; 19% for every dollar over $18,200 up to $45,000 (that’s 19% of $26,800 = $5092). That strikes me as a pretty reasonable tax rate for relatively low income earners. The rate from $45,000 to a whopping $120,000 is 32.5%, which also strikes me as low, though I’m pretty sure that those in this tax bracket, especially at the higher end, are howling about it. The rate goes up to 37% for earnings from $120,000 to $180,000, and then jumps to 45% for each dollar over $180,000.

Donaghy suggests that the Basic Income payment will be at the tax-free threshold, which at the current tax-free rate would be $700 fortnightly – a bit low as the tax free threshold has been lowered recently. I would expect such a payment to be around $900/fortnightly, which would mean, for simplicity’s sake, raising the threshold again. Not difficult, as governments tinker with the threshold regularly.

So, how to massage the tax system to support some kind of Basic Income? I’ll write about that next time.

References

Brian Donaghy, A basic income for Australia, 2020

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on dating techniques – not what you think

C-14 dating of a New Zealand Moa – the original pic is interactive

I’m currently reading a Christmas present book, Ancient bones: unearthing the astonishing new story of how we became human , by the German palaeontologist and palaeoclimatologist Madelaine Böhme, co-written with Rudiger Braun and Florian Breier. I’ve become very taken with it, as it’s seriously challenging a hypothesis/theory I thought was now well established, namely the ‘Out of Africa’ hypothesis. But what would I know?

I hope to write about all that elsewhere, but here, in keeping with this blog’s raison d’être, I want to focus on a couple of dating techniques for ancient fossils that have been developed in recent decades, as solutions to the problem of providing the fullest picture of the planet’s living past and its evolution. Böhme’s book gives a brief overview of some of these technologies, and I want to see if I can fully understand them.

I note that the term ‘quaternary geochronology’, which I’ve just discovered, covers dating techniques for the quaternary period – the last 2.6 million years – though Ancient Bones is dealing with proto-humans going back as far as our links with bonobos and chimps, some 7 million years ago. That’s into the late neogene period, geologically speaking.

radiocarbon

First, the most well-known, carbon-14 or radiocarbon dating. Carbon-14 is a rare, weakly radioactive isotope of carbon, first discovered in 1940, containing 8 neutrons instead of the usual 6 (carbon-13, a stable isotope, is much more common, making up 1% of all carbon). Carbon-14 is unstable and decays at a steady rate, hence its value as a tool in archaeology and geology. Böhme et al give a nice account of its use in dating:

Living plants regularly absorb C-14 out of the carbon dioxide in the air when they photosynthesise, and they incorporate it, along with C-12, into their tissues. The relationship between C-14 and C-12 in plants and in the animals that eat them therefore remains constant. After an organism dies, however, a kind of atomic clock begins to run. Because only the amount of C-14 present in the tissues at the time of death remains and no new C-14 is added, the portion of C-14 in the tissues declines at a constant rate through radioactive decay. This process is completely uniform, and it is therefore easy to translate it into time and use it to calculate the age of things.

Ancient Bones, p154

I quoted this at length, as it’s a great explanation for novices. The limitation to this dating technique, though, is the relative rapidity of C-14 decay. It has a half-life of about 5,730 years, meaning that the amount of the C-14 isotope in samples reduces by half in that time. So it is only useful for dating items less than about 50,000 years old.

Radiometric dating, using the decay rates of uranium and thorium, can date fossils and rocks back to half a million years, and other radiometric measurements (uranium-lead and potassium-argon) can take us back further still, but this depends on whether rocks contain the required elements.

magnetostratigraphy

This is a fascinating technique which examines the orientation of magnetic particles in rocks. The Earth’s magnetic field (or geomagnetic field) – which interacts with and protects us from solar wind particles – is always shifting its orientation, and every so often, over millions of years, completely reverses itself (reversal of polarity). So different strata in rock formations can be dated in terms of these magnetic reversals. These are called magnetozones. Currently, our magnetic north pole is oriented roughly with our geographic North Pole, which is described as normal polarity as opposed to reverse polarity.

However, different rock types are more or less metallic in composition, and their structure varies. The best types of sediments for this kind of dating have fine-grained metallic elements that are more likely to orient with the ambient magnetic field at deposition.

The technique is particularly useful for gathering information about rates of sediment accumulation. Changes in magnetic orientations have been plotted on a Global Metallic Polarity Time Scale (GMPTS) and this can be plotted against the depth of sediment for a particular period of orientation, known as a chron (intervals of less than 200,000 years are called sub-chrons).

There are of course other dating methods, including relative dating based on reliably dated fossil samples, and new ‘absolute dating’ techniques are being developed all the time, including, for example, thermoluminescence, electron spin resonance and electron paramagnetic resonance for dating fossil teeth. But I’ll need to learn a lot more about them.

References

Madelaine Böhme, Rudiger Braun & Florian Breier, Ancient bones: unearthing the astonishing new story of how we became human, 2020

https://www.sciencedirect.com/topics/earth-and-planetary-sciences/magnetostratigraphy

https://en.wikipedia.org/wiki/Magnetostratigraphy

https://www.spectroscopyeurope.com/component/content/article/3328-dating-fossil-teeth-by-electron-paramagnetic-resonance-how-is-that-possible

https://www.sciencedirect.com/science/article/abs/pii/1040618289900104

https://www.sciencelearn.org.nz/image_maps/37-c-14-carbon-dating-process

more on vaccines

nice image showing the storage requirements of the two vaccines soon to be available in Australia – filched from the ABC

While I’m on vaccines, the Oxford vaccine is another. A friend sent me a link to an article in The Independent, a UK newspaper, headed ‘Oxford scientists preparing to design new versions of Covid vaccine in response to variants’. Variants are cropping up around the world at the moment, the UK variant (called B117) being followed by a South African and Brazilian variant. That’s unlikely to be the last of them. However the three leading lights re covid19 vaccines, Oxford/AstraZeneca, Pfizer/BioNTech and Moderna, all say they’ve got B117 covered, and presumably are confident about other variants. Of course the key is whether adjusted vaccines can be produced rapidly in sufficient quantities.

However, there are other issues. The possible proliferation of variants raises the question of whether we can successfully vaccinate our way out of this pandemic. The South African variant (501Y.V2) is particularly concerning, as some patients’ antibodies, after treatment, are not recognising it. It isn’t yet clear how significant this development is.

So while we await developments, I want to look at the Oxford/AstraZeneca vaccine (ChAdOx1) in a bit more detail. A few basic facts. It has been developed from a chimpanzee adenovirus, a type of DNA virus that causes relatively mild symptoms in chimps (we know of over 60 adenovirus types, many of which cause cold and flu-like symptoms in humans). It’s the vaccine of choice of the British government, unsurprisingly, and some 100 million doses have been ordered so far. It’s also cheaper (at $3 to $4US a dose) and easier to store than the two other major vaccines, which makes it the best option for poorer nations. AstraZeneca has promised to always sell the vaccine at cost to those nations.

The adenovirus has been altered to include genetic material from SARS-CoV2, so as to evoke an effective antibody and T-cell response to that virus – which has presumably been tested in clinical trials. The vaccine is described as up to 90% effective, depending on dosage, a lower percentage than the other two more expensive vaccines I’ve mentioned. Other vaccines, including Russia’s Sputnik-V and the Johnson & Johnson vaccine, have been developed from adenoviruses. Oxford researchers have found, unexpectedly, that giving a half-dose, followed weeks later by a full dose, improved efficacy by up to 90%, compared to 62% for two full doses. The reason for this result remains a mystery – further research required. It should be noted that vaccines with 60-70% efficacy are generally regarded as successful.

As I write, I’ve heard that Australia’s medical regulator, the Therapeutic Goods Administration (TGA) has approved the Pfizer vaccine for use here. Ten million doses will be rolled out in late February, after batch testing by the TGA. Why did they approve this version first? That will require further investigation, but I suspect that the greater flexibility of this new mRNA technology – all they need is the genetic sequence of a new SARS-CoV2 variant to create a vaccine to cover it – might have been a deciding factor.

However, it may well be that the Oxford/AstraZeneca vaccine, which should be approved soon, and which has been put on order, will be the most widely available, due to ease of storage and a cheaper price tag. Australia is able to manufacture this vaccine locally, so that supply shouldn’t be a problem.

Other issues – which authorities are not so willing to discuss given the need to protect high-risk individuals at the outset – are the vaccination of children, and how to deal with vaccine reluctance, or hesitancy, the new buzz-terms for anti-vaxxers. This leads to the issue of herd immunity, which I’ll discuss in my next post.

References

https://www.independent.co.uk/news/health/covid-oxford-vaccine-uk-variant-doses-b1790026.html

https://www.bbc.com/news/av/explainers-55044811

https://www.ft.com/content/49d4a7ff-a20c-4ac2-84f7-d9dbab1d431f

https://www.abc.net.au/news/2021-01-25/pfizer-vaccine-approved-australia-but-is-it-the-one-you-will-get/13088856

a brief look at mRNA biotech

from ScienceDirect: The mechanisms of different nucleic acid vaccines, including DNA vaccines, mRNA vaccines.

So it’s been three years since I’ve written on this blog, and I feel it’s time to revive it, and explore human optimism, innovation and all that positive stuff. I plan to revisit some of the innovations and pathways I’ve looked at before, to update my knowledge and check on progress, as well as checking out new developments to expand my range and keep my brain from atrophying.

So I’ll start with vaccination. The ongoing pandemic, that we here in Australia have largely dodged, has brought about an unprecedented response from virologists, completely upending the standard lag time between identifying the pathogen and having a vaccine, in fact more than one, produced in such numbers as to induce herd immunity and bring the situation more or less under control.

Not long after SARS-CoV2 was identified, drug and biotech companies began a billion-dollars race to create a big name for themselves. Two of them, Pfizer, in collaboration with German biotech company BioNTech, and Moderna, have gained the most publicity, not only for being front-runners, but for having based their vaccine on messenger RNA (mRNA).

A November 10 article from STAT+ and the Boston Globe has helped me understand the significance. The idea, once the genetic sequence of the virus is known, is to create a synthetic variant of mRNA which could then make proteins (antibodies) which would inactivate the virus.

This is the role of mRNA in all our cells. It’s translated into proteins by means of our ribosomes, and these proteins are then dispatched to perform an endless variety of roles throughout our body, including as antibodies to prevent infections, and enzymes to repair tissues. The potential of synthesising mRNA for specific purposes – to fight disease and build immunity, for example – was recognised decades ago, but every attempt to inject synthetic mRNA met with failure, as the body’s immune system recognised a chemical intruder and mounted a vigorous response. However, this problem was eventually overcome, at least partially (this is still experimental and developing technology), by swapping out one of the four nucleosides that make up every strand of mRNA for a modified version. The hybrid mRNA is able to act within cells without invoking a killing immune response. The referenced article tells the story of how this development took some years to be recognised within the biotech community, in spite of a number of published papers. It’s a human story of egos and squabbles over priority, unsurprisingly, but I just want to focus on current implications. When the technology became known in the USA, it was first mooted as a way to reprogram somatic cells into embryonic stem cells. But soon, researchers noted the vast possibilities of a technology that could induce protein production in the body for a whole host of purposes – perhaps only limited by the innumerable roles proteins naturally perform in the body.

The technology, however, still faces many hurdles, mostly related to immune responses. In recent times it has limited its focus to vaccines, and this meant that it was ideally placed to tackle the current covid-19 pandemic. Clearly we have to wait awhile for a final verdict on the two mRNA vaccines now being produced and administered around the world, but, generally, so far, so good. I’m sure there will be more to write about re synthesised mRNA technology in the future.

References

The article below, mentioned in my piece, provides a more comprehensive, and fascinating, behind-the-scenes view of some of the people involved in this technology.

the battery, Snowy Hydro and other stuff

Let’s get back to batteries, clean energy and Australia. Here’s a bit of interesting news to smack our clean-energy-fearing Feds with – you know, Freudenberg, Morrison and co. The Tesla Big Battery successfully installed at the beginning of summer, and lampooned by the Feds, turns out to be doing a far better job than expected, and not just here in South Australia. Giles Parkinson reported on it in Renew Economy on December 19:

The Tesla big battery is having a big impact on Australia’s electricity market, far beyond the South Australia grid where it was expected to time shift a small amount of wind energy and provide network services and emergency back-up in case of a major problem.

Last Thursday, one of the biggest coal units in Australia, Loy Yang A 3, tripped without warning at 1.59am, with the sudden loss of 560MW and causing a slump in frequency on the network.

What happened next has stunned electricity industry insiders and given food for thought over the near to medium term future of the grid, such was the rapid response of the Tesla big battery to an event that happened nearly 1,000km away.

The Loy Yang brown coal fired power station is in south eastern Victoria, so why did South Australia’s pride and joy respond to a problem in our dirty-coal neighbouring state? It surely wouldn’t have been contracted to, or would it? Parkinson also speculates about this. Apparently, when a power station trips, there’s always another unit contracted to provide back-up, officially called FCAS (frequency control and ancillary services). In Loy Yang’s case it’s a coal generator in Gladstone, Queensland. This generator did respond to the problem, within seconds, but the Tesla BB beat it to the punch, responding within milliseconds. That’s an important point; the Tesla BB didn’t avert a blackout, it simply proved its worth, without being asked. And it has been doing so regularly since early December. It seems the Tesla BB has cornered the market for fast frequency control. Don’t hold your breath for the Feds to acknowledge this, but they will have taken note, unless they’re completely stupid. They’ll be finding some way to play it (or downplay it) politically.

As Parkinson notes in another article, the energy industry has been slow to respond, in terms of regulation and accommodation, to the deployment of battery systems and their rapid charge-discharge features. Currently, providing FCAS is financially rewarded, which may have to do with costs involved but the cost/reward relationship appears to be out of kilter. In any case, battery response is much more cost-effective and threatens the antiquated reward system. The AEMC is planning to review frequency control frameworks, but it’ll no doubt be a slow process.

This is an incredibly complex area, combining new, barely-understood (by me) technologies of generation and storage, and the transformation of long-standing energy economies, with a host of vested interests, subsidies and forward plans, but I intend to struggle towards enlightenment, as far as I can.

Neoen’s Hornsdale Wind Farm

Regardless of regulation and grid problems, renewable energy projects keep on popping up, or at least popping into my consciousness through my desultory reading (NY resolution: inform myself much more on what’s going on, here and elsewhere, in clean energy). For example, the Murra Warra wind farm’s first stage will have an output of 226MW,  which has already been sold to a consortium of Australian corporations including Telstra and ANZ. The farm is near Horsham in western Victoria, and will finally have a capacity of up to 429MW, making it one of the biggest in the Southern Hemisphere. And of course there are many other projects underway. Back in August, the Renewable Energy Index, a monthly account of the renewable energy sector, was launched. Its first publication, by Green Energy Markets, was a benchmark report for 2016-7, all very glossy and positive. The latest publication, the November index, shows that rooftop solar installations for that month broke the monthly record set in June 2012 when subsidies were twice to three times what they are today. The publication’s headline is that the 2020 RET will be exceeded and that there are ‘enough renewable energy projects now under development to deliver half of Australia’s electricity by 2030’. The Clean Energy Council, the peak body for Australian dean energy businesses, also produces an annual report, so it will be interesting to compare its 2017 version with the Renewable Energy Index.

Hydro is in fact the biggest clean energy provider, with 42.3% of the nation’s renewable energy according to the 2016 Clean Energy Australia Report. Wind, however, is the fastest growing provider. This brings me to a topic I’ve so far avoided: The $4 billion Snowy Hydro 2 scheme.

Here’s what I’m garnering from various experts. It’s a storage scheme and that’s all to the good. As a major project it will have a long lead time, and that’s not so good, especially considering the fast growing and relatively unpredictable future for energy storage. As a storage system it will be a peak load provider, so can’t be compared to the Hazelwood dirty coal station, which is a 24/7 base load supplier. There’s a lot of misinformation from the Feds about the benefits, eg to South Australia, which won’t benefit and doesn’t need it, it’s sorting its own problems very nicely thanks. There’s a question about using water as an electricity supplier, due to water shortages, climate change and the real possibility of more droughts in the future. There are also environmental considerations – the development is located in Kosciuszko National Park. There’s some doubt too about the 2000MW figure being touted by the Feds, an increase of 50% to the existing scheme. However, many of these experts, mostly academics, favour the scheme as a boost to renewable energy investment which should be applied along with the other renewables to transform the market. In saying this, most experts agree that there’s been a singular lack of leadership and common-sense consensus on dealing with this process of transformation. It has been left mostly to the states and private enterprise to provide the initiative.

 

the tides – a massive potential resource?

A floating tidal turbine, Orkney islands, as seen on Fully Charged

A recent episode of Fully Charged, the Brit video series on the sources and harnessing of clean energy, took us again to the very windy Orkney Isles at the top of Scotland to have a look at some experimental work being done on generating energy from tidal forces. When you think of it, it seems a no-brainer to harness the energy of the tides. They’re regular, predictable, unceasing, and in some places surely very powerful. Yet I’ve never heard of them being used on an industrial scale.

Of course, I’m still new to this business, so the learning curve continues steep. Tide mills have been used historically here and there, possibly even since Roman times, and tidal barrages have been operating since the sixties, the first and for a long time the largest being the La Rance plant, off the coast of Brittany, generating 240 MW. A slightly bigger one has recently been built in Korea (254 MW).

But tidal barrages – not what they’re testing in the Orkneys – come with serious environmental impact issues. They’re about building a barrage across a bay or estuary with a decent tidal flow. The barrage acts as a kind of adjustable dam, with sluice gates that open and close, and additional pumping when necessary. Turbines generate energy from pressure and height differentials, as in a hydro-electric dam. Research on the environmental impact of these constructions, which can often be major civil engineering projects, has revealed mixed results. Short-term impacts are often devastating, but over time one type of diversity has been replaced by another.

Anyway, what’s happening in the Orkneys is something entirely different. The islanders, the Scottish government and the EU are collaborating through an organisation called EMEC, the European Marine Energy Centre, to test tidal power in the region. They appear to be inviting innovators and technicians to test their projects there. A company called ScotRenewables, for example, has developed low-maintenance floating tidal turbines with retractable legs, one of which is currently being tested in the offshore waters. They’re designed to turn with the ebb and flood tides to maximise their power generation. It’s a 2 MW system, which of course could be duplicated many times over in the fashion of wind turbines, to generate hundreds if not thousands of megawatts. The beauty of the system is its reliability – as the tidal flow can be reliably predicted at least eighteen years into the future, according to the ScotRenewables CEO. This should provide a sense of stability and confidence to downstream suppliers. Also, floating turbines could easily be removed if they’re causing damage, or if they require maintenance. Clearly, the effect on the tidal system would be minimal compared to an estuarine barrage, though there are obvious dangers to marine life getting too close to turbines. The testing of these turbines is coming to an end and they’ve been highly successful so far, though they already have an improved turbine design in the wings, which can be maintained either in situ or in dock. The design can also be scaled down, or up, to suit various sites and conditions.

rotors are on retractable legs, to protect from storms, etc

Other quite different turbine types are being tested in the region, with a lot of government and public support, but I got the slight impression that commercial support for this kind of technology is somewhat lacking. In the Fully Charged video on this subject (to which I owe most of this info), Robert Llewelyn asked the EMEC marketing manager whether she thought tidal or wave energy had the greatest future potential (she opted for wave). My ears pricked up, as wave energy is another newie for me. Duh. Another post, I suppose.

As mentioned though in this video, a lot of the developments in this tidal technology have come from shipbuilding technology, from offshore oil and gas technology, and from maritime technology more generally, as well as modern wind turbine technology, further impressing on me that skills are transferable and that the cheap clean energy revolution won’t be the economic/employment disaster that the fossil fuel dinosaurs predict. It’s a great time for innovation, insight and foresight, and I can only hope that more government and business people in Australia, where I seem to be stuck, can get on board.

fixed underwater tidal turbine being tested off the Orkney Islands

stand-alone solar: an off-grid solution for Australia’s remote regions (plus a bit of a rant)

(reblogged from the new ussr illustrated)

According to this article, Australia is leading the world in per capita uptake of rooftop solar, though currently South Australia is lagging behind, in spite of a lot of clean energy action from our government. The Clean Energy Regulator has recently released figures showing that 23% of Australians have installed rooftop solar in the last ten years, and this take-up is set to continue in spite of the notable lack of encouragement from the feds. South Australia is still making plenty of waves re clean energy, though, as it is continually lowering its record for minimum grid demand, through the use of solar PV. The record set a couple of days ago, interestingly on Sunday afternoon rather than in the middle of the night, was 587MW, almost 200MW less than the previous record set only a week or so before. Clearly this trend is set to continue.

It’s hard for me to get my head around what’s happening re disruptive technologies, microgrids, stand-alone solar, EVs, battery research and the like, not to mention the horribly complex economics around these developments, but the sense of excitement brought about by comprehensive change makes me ever-willing to try. Only this morning I heard a story of six farming households described as being ‘on the fringe of Western Australia’s power network’ who’ve successfully trialled stand-alone solar panels (powered by lithium-ion batteries) on their properties, after years of outages and ‘voltage spikes’*. The panels – and this is the fascinating part – were offered free by Western Power (WA’s government-owned energy utility), who were looking for a cheaper alternative to the cost of replacing ageing infrastructure. The high costs of connecting remote farms to the grid make off-grid power systems a viable alternative, which raises issues about that viability elsewhere given the decreasing costs of solar PV, which can maintain electricity during power outages, as one Ravensthorpe family, part of the trial, discovered in January this year. The region, 500 kilometres south of Perth, experienced heavy rain and flooding which caused power failures, but the solar systems were unaffected. All in all, the trial has ‘exceeded expectations’, according to this ABC report.

All this has exciting implications for the future, but there are immediate problems. Though Western Power would like to sign off on the trial as an overwhelming success, and to apply this solution to other communities in the area (3,000 potential sites have been pinpointed), current regulation prevents this, as it only allows Western Power to distribute energy, not to generate it, as its solar installations are judged as doing. Another instance of regulations not keeping up with changing circumstances and solutions. Western Power has no alternative but to extend the trial period until the legislation catches up (assuming it does). But it would surely be a mistake not to change the law asap:

“You’d be talking about a saving of about $300 million in terms of current cost of investment and cost of ongoing maintenance of distribution line against the cost of the stand-alone power system,” Mr Chalkley [Western Power CEO] said.

Just as a side issue, it’s interesting that our PM Malcolm Turnbull, whose government seems on the whole to be avoiding any mention of clean energy these days, has had solar panels on his harbourside mansion in Point Piper, Sydney, for years. He now has an upgraded 14 kW rooftop solar array and a 14kWh battery storage system installed there, and, according to a recent interview he did on radio 3AW, he doesn’t draw any electricity from the grid, in spite of using a lot of electricity for security as Prime Minister. Solar PV plus battery, I’m learning, equals a distributed solar system. The chief of AEMO (the Australian Energy Market Operator), Audrey Zibelman, recently stated that distributed rooftop solar is on its way to making up 30 to 40% of our energy generation mix, and that it could be used as a resource to replace baseload, as currently provided by coal and gas stations (I shall write about baseload power issues, for my own instruction, in the near future).

Of course Turnbull isn’t exactly spruiking the benefits of renewable energy, having struck a Faustian bargain with his conservative colleagues in order to maintain his prestigious position as PM. We can only hope for a change of government to have any hope of a national approach to the inevitable energy transition, and even then it’ll be a hard road to hoe. Meanwhile, Tony Abbott, Turnbull’s arch-conservative bête noir, continues to represent the dark side. How did this imbecilic creature ever get to be our Prime Minister? Has he ever shown any signs of scientific literacy? Again I would urge extreme vetting of all candidates for political office, here and elsewhere, based on a stringent scientific literacy test. Imagine the political shite that would be flushed down the drain with that one. Abbott, you’ll notice, always talks of climate change and renewable energy in religious terms, as a modern religion. That’s because religion is his principal obsession. He can’t talk about it in scientific terms, because he doesn’t know any. Unfortunately, these politicians are rarely challenged by journalists, and are often free to choose friendly journalists who never challenge their laughable remarks. It’s a bit of a fucked-up system.

Meanwhile the ‘green religionists’, such as the Chinese and Indian governments, and the German and Scandinavian governments, and Elon Musk and those who invest in his companies, and the researchers and scientists who continue to improve solar PV, wind turbine and battery technology, including flow batteries, supercapacitors and so much more, are improving their developments and disrupting traditional ways of providing energy, and will continue to do so, in spite of name-calling from the fringes (to whom they’re largely deaf, due to the huge level of support from their supporters). It really is an exciting time not to be a dinosaur.

 

capacitors, supercapacitors and electric vehicles

(this is reblogged from the new ussr illustrated, first published September 5 2017)

from the video ‘what are supercapacitors’

Jacinta: New developments in battery and capacitor technology are enough to make any newbie’s head spin.

Canto: So what’s a supercapacitor? Apart from being a super capacitor?

Jacinta: I don’t know but I need to find out fast because supercapacitors are about to be eclipsed by a new technology developed in Great Britain which they estimate as being   ‘between 1,000 and 10,000-times more effective than current supercapacitors’.

Canto: Shite, they’ll have to think of a new name, or downgrade the others to ‘those devices formerly known as supercapacitors’. But then, I’ll believe this new tech when I see it.

Jacinta: Now now, let’s get on board, superdisruptive technology here we come. Current supercapacitors are called such because they can charge and discharge very quickly over large numbers of cycles, but their storage capacity is limited in comparison to batteries…

Canto: Apparently young Elon Musk predicted some time ago that supercapacitors would provide the next major breakthrough in EVs.

Jacinta: Clever he. But these ultra-high-energy density storage devices, these so-much-more-than-super-supercapacitors, could enable an EV to be charged to a 200 kilometre range in just a few seconds.

Canto: So can you give more detail on the technology?

Jacinta: The development is from a UK technology firm, Augmented Optics, and what I’m reading tells me that it’s all about ‘cross-linked gel electrolytes’ with ultra-high capacitance values which can combine with existing electrodes to create supercapacitors with greater energy storage than existing lithium-ion batteries. So if this technology works out, it will transform not only EVs but mobile devices, and really anything you care to mention, over a range of industries. Though everything I’ve read about this dates back to late last year, or reports on developments from then. Anyway, it’s all about the electrolyte material, which is some kind of highly conductive organic polymer.

Canto: Apparently the first supercapacitors were invented back in 1957. They store energy by means of static charge, and I’m not sure what that means…

Jacinta: We’ll have to do a post on static electricity.

Canto: In any case their energy density hasn’t been competitive with the latest batteries until now.

Jacinta: Yes it’s all been about energy density apparently. That’s one of the main reasons why the infernal combustion engine won out over the electric motor in the early days, and now the energy density race is being run between new-age supercapacitors and batteries.

Canto: So how are supercapacitors used today? I’ve heard that they’re useful in conjunction with regenerative braking, and I’ve also heard that there’s a bus that runs entirely on supercapacitors. How does that work?

Jacinta: Well back in early 2013 Mazda introduced a supercapacitor-based regen braking system in its Mazda 6. To quote more or less from this article by the Society of Automotive Engineers (SAE), kinetic energy from deceleration is converted to electricity by the variable-voltage alternator and transmitted to a supercapacitor, from which it flows through a dc-dc converter to 12-V electrical components.

Canto: Oh right, now I get it…

Jacinta: We’ll have to do posts on alternators, direct current and alternating current. As for your bus story, yes, capabuses, as they’re called, are being used in Shanghai. They use supercapacitors, or ultracapacitors as they’re sometimes called, for onboard power storage, and this usage is likely to spread with the continuous move away from fossil fuels and with developments in supercaps, as I’ve heard them called. Of course, this is a hybrid technology, but I think they’ll be going fully electric soon enough.

Canto: Or not soon enough for a lot of us.

Jacinta: Apparently, with China’s dictators imposing stringent emission standards, electric buses, operating on power lines (we call them trams) became more common. Of course electricity may be generated by coal-fired power stations, and that’s a problem, but this fascinating article looking at the famous Melbourne tram network (run mainly on dirty brown coal) shows that with high occupancy rates the greenhouse footprint per person is way lower than for car users and their passengers. But the capabuses don’t use power lines, though they apparently run on tracks and charge regularly at recharge stops along the way. The technology is being adopted elsewhere too of course.

Canto: So let me return again to basics – what’s the difference between a capacitor and and a super-ultra-whatever-capacitor?

Jacinta: I think the difference is just in the capacitance. I’m inferring that because I’m hearing, on these videos, capacitors being talked about in terms of micro-farads (a farad, remember, being a unit of capacitance), whereas supercapacitors have ‘super capacitance’, i.e more energy storage capability. But I’ve just discovered a neat video which really helps in understanding all this, so I’m going to do a breakdown of it. First, it shows a range of supercapacitors, which look very much like batteries, the largest of which has a capacitance, as shown on the label, of 3000 farads. So, more super than your average capacitor. It also says 2.7 V DC, which I’m sure is also highly relevant. We’re first told that they’re often used in the energy recovery system of vehicles, and that they have a lower energy density (10 to 100 times less than the best Li-ion batteries), but they can deliver 10 to 100 times more power than a Li-ion battery.

Canto: You’ll be explaining that?

Jacinta: Yes, later. Another big difference is in charge-recharge cycles. A good rechargeable battery may manage a thousand charge and recharge cycles, while a supercap can be good for a million. And the narrator even gives a reason, which excites me – it’s because they function by the movement of ions rather than by chemical reactions as batteries do. I’ve seen that in the videos on capacitors, described in our earlier post. A capacitor has to be hooked up to a battery – a power source. So then he uses an analogy to show the difference between power and energy, and I’m hoping it’ll provide me with a long-lasting lightbulb moment. His analogy is a bucket with a hole. The amount of water the bucket can hold – the size of the bucket if you like – equates to the bucket’s energy capacity. The size of the hole determines the amount of power it can release. So with this in mind, a supercar is like a small bucket with a big hole, while a battery is more like a big bucket with a small hole.

Canto: So the key to a supercap is that it can provide a lot of power quickly, by discharging, then it has to be recharged. That might explain their use in those capabuses – I think.

Jacinta: Yes, for regenerative braking, for cordless power tools and for flash cameras, and also for brief peak power supplies. Now I’ve jumped to another video, which inter alia shows how a supercapacitor coin cell is made – I’m quite excited about all this new info I’m assimilating. A parallel plate capacitor is separated by a non-conducting dielectric, and its capacitance is directly proportional to the surface area of the plates and inversely proportional to the distance between them. Its longer life is largely due to the fact that no chemical reaction occurs between the two plates. Supercapacitors have an electrolyte between the plates rather than a dielectric…

Canto: What’s the difference?

Jacinta: A dielectric is an insulating material that causes polarisation in an electric field, but let’s not go into that now. Back to supercapacitors and the first video. It describes one containing two identical carbon-based high surface area electrodes with a paper-based separator between. They’re connected to aluminium current collectors on each side. Between the electrodes, positive and negative ions float in an electrolyte solution. That’s when the cell isn’t charged. In a fully charged cell, the ions attach to the positively and negatively charged electrodes (or terminals) according to the law of attraction. So, our video takes us through the steps of the charge-storage process. First we connect our positive and negative terminals to an energy source. At the negative electrode an electrical field is generated and the electrode becomes negatively charged, attracting positive ions and repelling negative ones. Simultaneously, the opposite is happening at the positive electrode. In each case the ‘counter-ions’ are said to adsorb to the surface of the electrode…

Canto: Adsorption is the adherence of ions – or atoms or molecules – to a surface.

Jacinta: So now there’s a strong electrical field which holds together the electrons from the electrode and the positive ions from the electrolyte. That’s basically where the potential energy is being stored. So now we come to the discharge part, where we remove electrons through the external surface, at the electrode-electrolyte interface we would have an excess of positive ions, therefore a positive ion is repelled in order to return the interface to a state of charge neutrality – that is, the negative charge and the positive charge are balanced. So to summarise from the video, supercapacitors aren’t a substitute for batteries. They’re suited to different applications, applications requiring high power, with moderate to low energy requirements (in cranes and lifts, for example). They can also be used as voltage support for high-energy devices, such as fuel cells and batteries.

Canto: What’s a fuel cell? Will we do a post on that?

Jacinta: Probably. The video mentions that Honda has used a bank of ultra capacitors in their FCX fuel-cell vehicle to protect the fuel cell (whatever that is) from rapid voltage fluctuations. The reliability of supercapacitors makes them particularly useful in applications that are described as maintenance-free, such as space travel and wind turbines. Mazda also uses them to capture waste energy in their i-Eloop energy recovery system as used on the Mazda 6 and the Mazda 3, which sounds like something worth investigating.

References (videos can be accessed from the links above)

http://www.hybridcars.com/supercapacitor-breakthrough-allows-electric-vehicle-charging-in-seconds/

https://en.wikipedia.org/wiki/Supercapacitor

http://www.power-technology.com/features/featureelectric-vehicles-putting-the-super-in-supercapacitor-5714209/

http://articles.sae.org/11845/

https://www.ptua.org.au/myths/tram-emissions/

http://www.europlat.org/capabus-the-finest-advancement-for-electric-buses.htm

what are capacitors?

(this is reblogged from the new ussr illustrated, first published August 29 2017)

the shapes and sizes of capacitors – a screenshot taken from the youtube vid – What are Capacitors? – Electronics Basics 11

Jacinta: We’re embarking on the clearly impossible task of learning about every aspect of clean (and sometimes dirty because nothing’s 100% clean or efficient) technology – batteries, photovoltaics, turbines, kilo/megawatt-hours, glass electrolytes, powerwalls, inverters, regen, generators, airfoils, planetary gear sets, step-up transformers, nacelles AND capacitors.

Canto; Enough to last us a lifetime at our slow pace. So what, in the name of green fundamentalism, is a capacitor?

Jacinta: Well I’ve checked this out with Madam Youtube…

Canto: Professor Google’s co-dependent…

Jacinta: And in one sense it’s simple, or at least it sounds simple. Capacitors store electric charge, and the capacitance of a capacitor relates to how much charge it can hold.

Canto: So how does it do that, and what’s the purpose of storing electric charge?

Jacinta: Okay now you’re complicating matters, but basic to all capacitors are two separated pieces of conducting material, usually metal. Connected to a battery, they store charge…

Canto: Which is a kind of potential energy, right?

Jacinta: Umm, I think so. So take your battery with its positive and negative terminals. Attach one of the bits of conducting material (metal) to the positive terminal and you’ll get a flow of negatively-charged electrons to that terminal, because of ye olde law of attraction. This somehow means that electrons are repelled from the negative terminal  (which we’ve hooked up to the other bit of metal in the capacitor). So because the first strip of metal has lost electrons it has become positively charged, and the other bit of metal, having gained electrons, has an equal and opposite charge. So each piece of metal has the same magnitude of charge, measured in coulombs. This is regardless of the size and shape of the different metal bits.

Canto: But this process reaches a limit, though, yes? A kind of saturation point…

Jacinta: Well there comes a point where, yes, the accumulated charge just sits there. This is because there comes a kind of point of equilibrium between the positive battery terminal and the now positively charged strip of metal. The electrons are now caught between the attractive positive terminal and the positive strip.

Canto: Torn between two lovers, I know that foolish feeling.

Jacinta: So now if you remove the battery, so breaking the circuit, that accumulated charge will continue to sit there, because there’s nowhere to go.

Canto: And of course that accumulated or stored charge, or capacitance, is different for different capacitors.

Jacinta: And here’s where it gets really complicated, like you know, maths and formulae and equations. C = Q/V, capacitance equals the charge stored by the capacitor over the voltage across the capacitor. That charge (Q), in coulombs, is measured on one side of the capacitor, because the charges actually cancel each other out if you measure both sides, making a net charge of zero. So far, so uncomplicated, but try and get the following. When a capacitor stores charge it will create a voltage, which is essentially a difference in electric potential between the two metal strips. Now apparently (and you’ll have to take my word for this) electric potential is high near positive charges and low near negative charges. So if you bring these two differently charged strips into close proximity, that’s when you get a difference in electric potential – a voltage. If you allow a battery to fully charge up a capacitor, then the voltage across it (between the two strips) will be the same as the voltage in the battery. The capacitance, Q/V, coulombs per volt, is measured in farads, after Micky Faraday, the 19th century electrical wizz. I’m quoting this more or less verbatim from the Khan Academy video on capacitors, and I’m almost finished, but here comes the toughest bit, maths! Say you have a capacitor with a capacitance of 3 farads, and it’s connected to a nine volt battery, the charge stored will be 27 coulombs (3 = 27/9). 3 farads equals 27 coulombs of charge divided by nine volts, or 27 coulombs of charge is 3 farads times 9 volts. Or, if a 2 farad capacitor stores a charge of 6 coulombs, then the voltage across the capacitor will be 3 volts.

Canto: Actually, that’s not so difficult to follow, the maths is the easiest part for me… it’s more the concepts that get me, the very fact that matter has these electrical properties…

Jacinta: Okay here’s the last point made, more or less verbatim, on the Khan Academy video, something worth pondering:

You might think that as more charge gets stored on a capacitor, the capacitance must go up, but the value of the capacitance stays the same because as the charge increases, the voltage across that capacitor increases, which causes the ratio to stay the same. The only way to change the capacitance of a capacitor is to alter the physical characteristics of that capacitor (like making the pieces of metal bigger, or changing the distance between them).

Canto: Okay so to give an example, a capacitor might be connected to an 8 volt battery, but its capacitance is, say, 3 farads. It will be fully charged at 24 coulombs over 8 volts. The charge increases with the voltage, which has a maximum of 8. The ratio remains the same. Yet somehow I still don’t get it. So I’m going to have a look at another video to see if it helps. It uses the example of two metal plates. They start out as electrically neutral. You can’t force extra negativity, in the form of electrons, into one of these plates, because like charges repel, and they’ll be forced out again. But, according to the video, if you place another plate near the first, ‘as electrons accumulate in the first metal plate, they will repel the electrons in the second metal plate’, to which I want to respond, ‘but electrons aren’t accumulating, they’re being repelled’. But let’s just go with the electron flow. So the second metal plate becomes depleted of electrons and is positively charged. This means that it will attract the negatively charged first metal plate. According to the video, this makes it possible for the first plate to have more negative than positive particles, which I think has something to do with the fact that the electrons can’t jump from the first plate to the second, to create an equilibrium.

Jacinta: They’re kind of attracted by absence. That’s what they must mean by electric potential. It’s very romantic, really. But what you’ve failed to notice, is that a force is being continually applied, to counteract the repulsion of electrons from the first plate. If the force no longer applies then, yes, you won’t get that net negative charge in the first plate, and the consequent equal and opposite charge in the second. My question, though, is how can the capacitance increase by bringing the plates closer together? I can see how it can be changed by the size of the conducting material – more electrons, more electric potential. I suppose reducing the distance will increase the repulsive force…

Canto: Yes, let’s assume so. Any, a capacitor, which stores far less charge than a similarly-dimensioned battery can be used, I think, to briefly maintain power to, say, a LED bulb when it is disconnected from the battery. The capacitor, connected to the bulb will discharge its energy ‘across’ the bulb until it achieves equilibrium, which happens quite quickly, and the bulb will fade out. If the capacitor is connected to a number of batteries to achieve a higher voltage, the fully charged capacitor will take longer to discharge, keeping the light on for longer. If the metal plates are larger, the capacitor will take longer to charge up, and longer to discharge across the LED bulb. Finally, our second video (from a series of physics videos made by Eugene Khutoryansky) shows that you can place a piece of ‘special material’ between the two plates. This material contains molecules that change their orientation according to the charges on the plates. They exert a force which attracts more electrons to the negative plate, and repel them from the positive plate, which has the same effect as increasing the area of the plates – more charge for the same applied voltage.

Jacinta: An increase in capacitance.

Canto: Yes, and as you’ve surmised, bringing the two plates closer together increases the capacitance by attracting more electrons to the negatively charged plate and repelling them from the positively charged one – again, more charge for the same voltage.

Jacinta: So you can increase capacitance with a combo of the three – increased size, closer proximity, and that ‘special material’. Now, one advantage of capacitors over batteries is that they can charge up and discharge very quickly. Another is that they can endure many charge-discharge cycles. However they’re much less energy dense than batteries, and can only store a fraction of the energy of a same-sized battery. So the two energy sources have different uses.

Canto: Mmmm, and we’ll devote the next post to the uses to which capacitors can be put in electronics, and EVs and such.

 

electric vehicles in Australia, a sad indictment

(this is reblogged from the new ussr illustrated, first published August 15 2017)

Toyota Prius

I must say, as a lay person with very little previous understanding of how batteries, photovoltaics or even electricity works, I’m finding the ‘Fully Charged’ and other online videos quite addictive, if incomprehensible in parts, though one thing that’s easy enough to comprehend is that transitional, disruptive technologies that dispense with fossil fuels are being taken up worldwide at an accelerating rate, and that Australia is falling way behind in this, especially at a governmental level, with South Australia being something of an exception. Of course the variation everywhere is enormous – for example, currently, 42% of all new cars sold today in Norway are fully electric – not just hybrids. This compares to about 2% in Britain, according to Fully Charged, and I’d suspect that the percentage is even lower in Oz.

There’s so much to find out about and write about in this field it’s hard to know where to start, so I’m going to limit myself in this post to electric cars and the situation in Australia.

First, as very much a lower middle class individual I want to know about cost, both upfront and ongoing. Now as you may be aware, Australia has basically given up on making its own cars, but we do have some imports worth considering, though we don’t get subsidies for buying them as they do in many other countries, nor do we have that much in the way of supportive infrastructure. Cars range in price from the Tesla Model X SUV, starting from $165,000 (forget it, I hate SUVs anyway), down to the Toyota Prius C and the Honda Jazz, both hybrids, starting at around $23,000. There’s also a ludicrously expensive BMW plug-in hybrid available, as well as the Nissan Leaf, the biggest selling electric car worldwide by a massive margin according to Fully Charged, but probably permanently outside of my price range at $51,000 or so.

I could only afford a bottom of the range hybrid vehicle, so how do hybrids work, and can you run your hybrid mostly on electricity? It seems that for this I would want a (more expensive) plug-in hybrid, as this passage from the Union of Concerned Scientists (USA) points out:

The most advanced hybrids have larger batteries and can recharge their batteries from an outlet, allowing them to drive extended distances on electricity before switching to [petrol] or diesel. Known as “plug-in hybrids,” these cars can offer much-improved environmental performance and increased fuel savings by substituting grid electricity for [petrol].

I could go on about the plug-ins but there’s not much point because there aren’t any available here within my price range. Really, only the Prius, the Honda Jazz and a Toyota Camry Hybrid (just discovered) are possibilities for me. Looking at reviews of the Prius, I find a number of people think it’s ugly but I don’t see it, and I’ve always considered myself a person of taste and discernment, like everyone else. They do tend to agree that it’s very fuel efficient, though lacking in oomph. Fuck oomph, I say. I’m the sort who drives cars reluctantly, and prefers a nice gentle cycle around the suburbs. Extremely fuel efficient, breezy and cheap. I’m indifferent to racing cars and all that shite.

Nissan Leaf

I note that the Prius  has regenerative braking – what the Fully Charged folks call ‘regen’. In fact this is a feature of all EVs and hybrids. I have no idea wtf it is, so I’ll explore it here. The Union of Concerned Scientists again:

Regenerative braking converts some of the energy lost during braking into usable electricity, stored in the batteries.

Regenerative braking” is another fuel-saving feature. Conventional cars rely entirely on friction brakes to slow down, dissipating the vehicle’s kinetic energy as heat. Regenerative braking allows some of that energy to be captured, turned into electricity, and stored in the batteries. This stored electricity can later be used to run the motor and accelerate the vehicle.

Of course, this doesn’t tell us how the energy is captured and stored, but more of that later. Regenerative braking doesn’t bring the car to a stop by itself, or lock the wheels, so it must be used in conjunction with frictional braking.  This requires drivers to be aware of both braking systems and how they’re combined – sometimes problematic in certain scenarios.

The V useful site How Stuff Works has a full-on post on regen, which I’ll inadequately summarise here. Regen (in cars) is actually celebrating its fiftieth birthday this year, having been first introduced in the Amitron, a car produced by American Motors in 1967. It never went into full-scale production. In conventional braking, the brake pads apply pressure to the brake rotors to the slow the vehicle down. That expends a lot of energy (imagine a large vehicle moving at high speed), not only between the pads and the rotor, but between the wheels and the road. However, regen is a different system altogether. When you hit the brake pedal of an EV (with hand or foot), this system puts the electric motor into reverse, slowing the wheels. By running backwards the motor acts somehow as a generator of electricity, which is then fed into the EV batteries. Here’s how HSW puts it:

One of the more interesting properties of an electric motor is that, when it’s run in one direction, it converts electrical energy into mechanical energy that can be used to perform work (such as turning the wheels of a car), but when the motor is run in the opposite direction, a properly designed motor becomes an electric generator, converting mechanical energy into electrical energy.

I still don’t get it. Anyway, apparently this type of braking system works best in city conditions where you’re stopping and going all the time. The whole system requires complex electronic circuitry which decides when to switch to reverse, and which of the two braking systems to use at any particular time. The best system does this automatically. In a review of a Smart Electric Drive car (I don’t know what that means – is ‘Smart’ a brand name? – is an electric drive different from an electric car??) on Fully Charged, the test driver described its radar-based regen, which connects with the GPS to anticipate, say, a long downhill part of the journey, and in consequence to adjust the regen for maximum efficiency. Ultimately, all this will be handled effectively in fully autonomous vehicles. Can’t wait to borrow one!

Smart Electric Drive, a cute two-seater

I’m still learning all this geeky stuff – never thought I’d be spending an arvo watching cars being test driven and  reviewed.  But these are EVs – don’t I sound the expert – and so the new technologies and their implications for the environment and our future make them much more interesting than the noise and gas-guzzling stink and the macho idiocy I’ve always associated with the infernal combustion engine.

What I have learned, apart from the importance of battery size (in kwh), people’s obsession with range and charge speed, and a little about charging devices, is that there’s real movement in Europe and Britain towards EVs, not to mention storage technology and microgrids and other clean energy developments, which makes me all the more frustrated to live in a country, so naturally endowed to take advantage of clean energy, whose federal government is asleep at the wheel on these matters, when it’s not being defensively scornful about all things renewable. Hopefully I’ll be able to report on positive local initiatives in this area in future, in spite of government inertia.