12 July 2016, Renew Economy, ACT could make windfall gains from bold 100% renewables target Who is the smartest energy minister in the country? At the moment, you would have to say it was the ACT’s Simon Corbell, the mastermind behind the territory’s bold 100 per cent renewable energy target, and who is poised to deliver massive savings to consumers in the nation’s capital. Indeed, if current wholesale electricity prices continue as they are across Australia, the ACT will not just have zero emissions electricity by 2020, it may also be getting most of it for free. This extraordinary situation arises out of the nature of the contracts that the ACT government has written with the project developers who have won its unique reverse auction tenders. The ACT has locked in fixed prices at between $77/MWh and $92/MWh for a total of 400MW of wind energy capacity so far. If the wholesale price is below those contracts, the ACT government pays the difference. If it is above, the ACT electricity utility ActewAGL receives the excess. In the past two months, wholesale prices across Australia have gone through the roof, mostly because of soaring gas prices (at record levels in most states), and supply constraints. Some of these rises have already been passed on to consumers. The first of the ACT commissioned wind farms, the 19MW Coonooer Bridge project in Victoria, opened earlier this year and gets a guaranteed $81.50/MWh from the ACT. But prices in Victoria have regularly jumped above $100/MWh in the past two months. Read More here
Tag Archives: Renewables
5 July 2016, Renew Economy, Hidden climate report could help Malcolm find the middle. The Climate Change Authority report that some suspected was buried by the Australian government to save it from policy embarrassment during the election campaign, could now make it easier for prime minister Malcolm Turnbull to find the middle ground in a minority government, or one ruling with a razor-thin majority. The CCA report had been expected to be released in late June, but was delayed until after the election, to the obvious relief of the government. So, too, was a report on options for the electricity sector, which had been due for release in April or May, and which leaked reports suggest strongly supported some form of mandatory carbon price. Those reports by the CCA, despite its board being stacked by Turnbull government appointees following the resignation of former chairman Bernie Fraser and other directors, would not have suited the Coalition election platform. They were expected to reaffirm the position that Australia was trailing the world in emission reductions, needed to do more, and would need to adopt a carbon price. And, they would likely note, this would not be anywhere near as expensive as many suggest. That, of course, would not have helped the Coalition election platform, which was to continue with its much criticised Direct Action program, and to lambast any proposals by Labor and the Greens for an economy-wide carbon price and higher renewable energy targets. Read More here
16 May 2016, Renew Economy, Vanadium: the ‘beautiful metal’ that stores energy. An unheralded metal could become a crucial part of the renewables revolution. Vanadium is used in new batteries which can store large amounts of energy almost indefinitely, perfect for remote wind or solar farms. And what’s more there is loads of the stuff simply lying around in industrial dumps. Don’t let the dumpster diving put you off – never mind gold or silver, vanadium may just be the most beautiful metal of all. It’s the 22nd most abundant element in the Earth’s crust, though it’s rarely found naturally in its metallic form. Instead, vanadium can be found in more than 100 different minerals. Once extracted and dissolved in water, various forms of vanadium turn into bright, bold colours. It’s even named after “Vanadis”, the old Norse name for the Scandinavian goddess of beauty, Freyja. Vanadium is not only beautiful, but also strong. Adding small percentages of it creates exceptionally light, tough and more resilient steel alloys. Henry Ford was the first to use it on an industrial scale, in the 1908 Model T car chassis, and today the vast majority of vanadium is used in structural steel, mainly to build bridges and buildings. Vanadium flow batteries The unique properties of vanadium make it ideal for a new type of batteries that may revolutionise energy systems in the near future – redox flow batteries. Batteries store energy and generate electricity by a reaction between two different materials – typically solid zinc and manganese. In flow batteries, these materials are liquid and have different electric charges. Both are pumped into a “cell” where the electric current is generated. A tiny membrane separates the two liquids, so they are able to react but don’t come into direct contact. Vanadium is used in these batteries as it can convert back and forth from its various different states, which can carry different positive charges. As only one material is used, the risk of cross contaminationis eliminated. The liquids have an indefinite life, so the replacement costs are low and there are no waste disposal problems. Also, the battery is extended to a potentially infinite lifetime. Watch ‘How the Vanadium battery works’ video here In flow batteries, the energy production and capacity are independent. Energy is stored in tanks, whereas the capacity depends only on the amount of liquid stored. This provides a great design flexibility that other batteries do not allow. They are also safer, as the two liquids don’t mix causing a sudden release of energy. Even President Obama is impressed. Read More here
13 May 2016, The Conversation, South Australia is now coal-free, and batteries could fill the energy gap. South Australia’s last coal-fired power station closed on Monday this week, leaving the state with only gas and wind power generators. The Northern Power Station, in Port Augusta on the northern end of the Spencer Gulf, has joined Playford B – the state’s other coal-fired power station which has already been retired. The coal mine at Leigh Creek that supplied brown coal to the power stations also closed earlier this year, so there is no easy option for re-opening the power stations. The immediate impact of the closure was a brief wobble in wholesale electricity prices, with more energy brought in from Victoria’s brown coal power stations (adding to carbon emissions). But how could it affect the state in the long term? Could South Australia run out of power? Average electricity demand in South Australia is 1.4 gigawatts, and the state record for peak demand of 3.4 gigawatts was set in January 2011. In the past two years the highest demand was 2.9 gigawatts. Rollout of rooftop solar panels is one of the reasons demand from the grid has been going down. The impact on the peak demand – the time of day when most people are using appliances – is less clear, because if the peak occurs after sunset, solar panels will not reduce it. Read More here