7 April 2016, Energy Post, Wind and solar’s Achilles heel: what the methane meltdown at Porter Ranch means for the energy transition. Utitlity-scale wind and solar power are typically backed up on-site by gas peakers, or backed up indirectly by gas-fired power plants. These gas plants lead to significant greenhouse gas emissions in the form of methane. So at what point does a renewable-plus-gas combination become worse for the climate than coal-fired power? Mike Conley and Tim Maloney, long-time members of the Thorium Energy Alliance, have calculated what they call a “Worth-It Treshold” that gives the answer. And they conclude as things stand, natural gas isn’t a bridge to a sustainable future.“We need about 3,000 feet of altitude, we need flat land, we need 300 days of sunlight, and we need to be near a gas pipe. Because for all of these big utility-scale solar plants – whether it’s wind or solar – everybody is looking at gas as the supplementary fuel. The plants that we’re building, the wind plants and the solar plants, are gas plants.” 1– Robert F. Kennedy, Jr. Environmental activist, Member of the board of Bright Source, developers of the Ivanpah Solar Station, Nevada, a 392 MW (peak) concentrated solar plant. Part One Natural Gas – the polite term for methane The methane leak in the Los Angeles suburb of Porter Ranch is America’s worst environmental disaster since the 2010 Deepwater Horizon oil spill in the Gulf of Mexico. But even more troubling is the larger issue of “fugitive” methane, and what it means for our growing reliance on wind and solar energy. Burning methane for energy produces about half the CO2 of coal, which is a good thing. But fugitive methane – the gas that leaks before it can be burned – is a powerful greenhouse gas, with 84X the Global Warming Potential (GWP) of CO2. The big idea behind wind and solar farms is to fight global warming by reducing greenhouse gases. But since most of a farm’s power is actually generated by gas, the rationale for a massive build-out of utility-scale wind and solar hinges on the issue of fugitive methane. That rationale just had a major meltdown at Porter Ranch. Read More here
Tag Archives: Renewables
31 March 2016, Energy Post, The end of coal: good riddance or dangerous gamble? Scotland has become the first part of the UK to stop burning coal to supply electricity following the closure of Longannet, its largest power station, on March 24. According to Paul Younger, Professor of Energy Engineering at University of Glasgow, the closure of coal-fired power plants in the UK may lead to serious problems with voltage control. Prepare for power interruptions and flickering lights. The closure of Longannet is a sign of the times, with the rest of the UK’s coal-fired power stations on death row after energy secretary Amber Rudd announced late last year that they will all be forced to close by 2025. For many reasons, it is hard to mourn the demise of coal-fired power. Around 12,000 miners are killed around the world each year, most of them digging for coal; abandoned mines cause widespread water pollution; and coal-fired plants pollute the air with the likes of nitrogen and sulphur compounds, as well as the highest greenhouse-gas emissions of any major source of energy generation. In the absence of carbon capture and storage, a technology which would be ready more quickly if the government backed it properly, plant closure may therefore seem sensible – even while we should help those that lose their jobs and regret the loss of skills from the workforce.If we are going to manage without Longannet and all the other gas-fired and coal-fired power stations, we would need at least 970 GWh of storage – more than a hundred pumped hydropower stations of comparable size to those we already have. That would be all there was to say were it not for a few harsh realities of electricity supply. There are two reasons why coal-fired power plants have survived so long. Coal is cheap; only since the US shale-gas boom has it been consistently beaten on price. And coal-fired plants are particularly suited to providing power on demand at short notice, as well as providing crucial stabilisation services for frequency and voltage across the grid. Read More here
30 March 2016, Energy Post, European dash for gas at odds with climate ambitions. European energy and European climate policies, although often portrayed as being two sides of the same coin, are still not sufficiently harmonised, writes Stefan Bößner, Research Fellow at the Stockholm Environment Institute. The EU’s new LNG and gas storage strategy serves as a prime example where EU energy security concerns work against climate protection efforts. The strategy is likely to lead to costly investments into infrastructure which may not be needed and which come at the cost of other options to enhance climate protection and energy security. The European Union often claims leadership on climate change. The EU not only saved the Kyoto Protocol by convincing Russia to join but also pushed for an ambitious climate agreement prior to the Paris Climate Conference (COP 21) last December. It is the only developed economy of comparable size that sources 26% of its energy needs from low-carbon sources and its 2030 goals to reduce emissions by 40% are among the most ambitious in the world. So far so good. The European Commission acknowledges the importance of “avoiding the ‘lock-in’ of high emissions infrastructure and assets.” But tis is exactly what might happen when one looks at the EU’s recent LNG and gas strategy. But despite those ambitions, the EU is likely to miss its contribution to limit global warming to two degrees (as decided upon in the Paris Agreement). And while some member states demand to raise the EU’s climate ambitions others refuse to do so, illustrating existing frictions between EU and member state policy making. But the EU itself is not without fault either. The European Commission also pursues conflicting aims sometimes in its climate and energy policies. Read More here
27 March 2016, Climate News Network, Renewable energy demands the undoable. Switching to renewable energy as fast as the world needs to will require changes so massive that they are unlikely to happen, scientists say. The world is increasingly investing in renewable energy. Last year, according to UN figures, global investment in solar power, wind turbines and other renewable forms of energy was $266 billion. This was more than double the investment of $130bn in coal and gas power stations in 2015. It sets a new investment record and brings spending on renewable energy since 2004 to a total, adjusted for inflation, of $2.3 trillion. And, says the United Nations Environment Programme’s report on Global Trends in Renewable Energy Investment 2016, that same push added 134 gigawatts (one gigawatt is reckoned enough to supply the needs of 750,000 typical US homes) of renewable power worldwide. It also spared the atmosphere the burden of an estimated 1.5 gigatonnes of carbon dioxide emissions (human activities, chiefly the burning of fossil fuels and changes in land use, add an extra 29 gigatonnes of CO2 to the atmosphere annually). Not enough But right now, the report says, renewable energy sources deliver just 10.3% of global electrical power. Neither the report’s authors nor anyone else thinks that is enough to slow climate change driven by rising global temperatures as a consequence of greenhouse gas emissions from fossil fuels. Read More here