25 January 2016, Renew Economy, Tasmania grid struggles with drought, bushfires, lost connection. Tasmania’s electricity grid is facing its biggest challenge in years, with its hydro storage about to fall to its lowest levels ever, bushfires forcing the closure of some power facilities, and a faulty cable cutting the connection between the island and the country’s main electricity grid. The Apple Isle’s main source of electricity – hydro power – is being challenged by its driest ever spring, pushing reserves down to just 18.9 per cent. The lowest level ever is 16.5 per cent, reached in 2007, but overall storage levels are predicted to fall to a low of 14 per cent by the end of March – if normal rainfall patterns resume. At current rates, however, some fear they may fall below those levels, although there has been some light rain in recent days. To make matters worse, the Basslink cable linking the island’s grid to the mainland has been cut by technical problems, and will probably remain closed for another two months, while the raging bushfires have threatened power lines and forced the temporary closure of at least four hydro plants. “These circumstances are extraordinary and unprecedented,” Premier Will Hodgman and energy minister Matthew Groom said in a joint statement late last week. “It will be tough, but we will get through it.” To address the issue, the government has had to bring its Tamar Valley gas power generator – scheduled for permanent closure last year – out of mothballs. That has provided 280MW of added capacity, but the government is now looking to bring another 105MW of gas and diesel power back into the system to hedge against further depletion of its hydro resources. Read More here
Tag Archives: Renewables
17 January 2016, Climate News Network, Grasses’ growing role for American cars. Second-generation biofuel made from natural grass species challenges ethanol derived from maize crops as the US seeks to reduce its fossil fuel use. In tomorrow’s world, it won’t be just the corn on the great American plains that is as high as an elephant’s eye. It will be the elephant grass as well. To deliver on US promises to reduce fossil fuel use, American motorists in future will drive on miscanthus − as elephant grass is also known – and prairie switchgrass. Researchers led by Evan DeLucia, professor of biology at the University of Illinois, report in a new journal, Nature Energy, that to exploit biofuels – which recycle carbon already in the atmosphere, and are therefore technically “carbon-neutral” – Americans will have to think again about how they manage the change away from fossil fuels. Right now, the US Environmental Protection Agency’s Renewable Fuel Standards foresee that by 2022 American motorists will start up their cars with 15 billion gallons (57 billion litres) of ethanol from corn. But this could be augmented by 16 billion gallons (60 billion litres) of biofuel derived from perennial grasses. Energy source The switch to the prairie’s native switchgrass (Panicum virgatum) andEurasian elephant grass (Miscanthus giganteus) will be necessary because there are problems with corn as a source of energy. One is that, in an increasingly hungry world, it reduces the overall levels of food available. The second is that corn requires annual planting, fertilising and harvesting. Perennial grasses simply grow, and can be mown once a year. So by turning over surplus land to swift-growing grasses, and at the same time reducing the levels of carbon dioxide released from cultivation, the US could meet its target of a 7% reduction in its annual transportation emissions by 2022. If farmers went on gradually to switch from corn to the grasses, the reduction could get as high as 12%. Read More here
15 January 2016, Renew Economy, Australia snubs 1st major post-Paris summit after killing renewables target. ABU DHABI: Australia has chosen not to send any government representatives to the first major post Paris climate change conference, as new data confirms how the Coalition government has effectively killed the renewable energy target as an effective policy mechanism. In 2015, the world invested a record $US329 billion in renewable energy. But in Australia, the RET – the country’s primary policy mechanism – has attracted just $15 million in investment in nearly two years. The data, from Bloomberg New Energy Finance, confirms that since the Abbott government announced its review into the RET in early 2014, the scheme has been at a standstill. That remains the case – even though renewable energy certificates have jumped to record levels of $74/MWh – because utilities and financiers refuse to sign contracts, due to the lack of policy certainty and because they believe that the Coalition could change the target again. Indeed, more than half Australia’s investment in renewable energy in 2015 (of $A4.1 billion) comes from households and businesses, who spent $2.2 billion in 2015 adding rooftop solar PV to their home and commercial premises. Read More here
14 January 2016, Climate News Network. Science opens routes to energy recycling. From turning carbon dioxide into a fuel to enabling cars to run on water, scientific researchers worldwide are unlocking the potential of new energy sources. Molecular biology has been used by scientists in the US to make a catalyst that can split water into hydrogen and oxygen. It means that a truly renewable biotechnological material could be used to help cars run on water. In China, chemists have announced a nanofabric – a catalyst put together atoms at a time – that could begin the process of turning the greenhouse gas carbon dioxide back into fuel. And with what seems like perfect timing, a new technological venture in Switzerland hopes to be the first commercial plant to harvest carbon dioxide from the air. The first two propositions are still in the laboratory stage, and the third has yet to prove its viability. But the laboratory advances keep alive the hopes of the ultimate in energy recycling. In the first process, water provides the energy for a chemical reaction that propels a vehicle, and then ends up again as water from the exhaust pipe of a car. And in the second, a gas released as emissions from fossil fuel could get turned back into fuel. Read more here