PLEA Network

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 CO_2. 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