Joseph Daniel at the Union of Concerned Scientists explains why variable renewables like wind and solar are not forcing coal plants to cycle (ramp up and down). He presents data from the U.S. that clearly shows it’s straightforward variable demand that’s doing it, because demand has always varied considerably throughout the day. So stop blaming the arrival and growth of wind and solar for this “inefficiency”, he says. These renewables have plenty … [Read more...]
Archives for March 2020
Two new designs, GSR and MA-ATR, to make “blue” Hydrogen cheaper
What’s the best way to make clean hydrogen? Steam Methane Reforming (SMR) is the most common and cheapest way of producing hydrogen, but it also produces CO2 emissions. Capturing that CO2 is complex and costly. Schalk Cloete presents research on two new designs for “blue” hydrogen (blue = derived from natural gas/coal with carbon capture/CCS). He describes in detail Gas Switching Reforming (GSR) and Membrane-Assisted Autothermal Reforming … [Read more...]
Methane emissions underestimated by 25-40%, says new study
The methane in our atmosphere comes from natural biogenic (plants, animals) and fossil sources. By telling the difference we can know how much we humans are responsible for. It matters because methane is a potent greenhouse gas, second only to CO2. Previous “bottom-up” estimates came from multiplying the number of sources (livestock, natural gas operations, landfills) by their likely emissions. Robert McSweeney at Carbon Brief describes a new … [Read more...]
Pumped Thermal Electricity Storage: grid-scale, cheap materials, known tech, compact, install anywhere
We need to store the huge quantities of excess electricity generated by variable renewables. But what’s the best way? Currently, over 99% of large-scale electricity storage uses pumped hydro dams. But geography severely limits where you can build one. And the growth of grid-scale batteries is limited by raw material costs and short lifecycles. Antoine Koen and Pau Farres Antunez at Cambridge University review an important alternative, Pumped … [Read more...]
From Buildings to Solar Thermal: using electric charge to vary insulating properties tenfold
The insulating properties of a material don’t normally vary. Applying an electric charge to a material can vary its electronic and magnetic qualities, but not its thermal conductivity, normally. David Chandler at MIT says now a team of researchers there have found a way to do it. Their “electrical heat valve” can increase the thermal conductivity of thin-film strontium cobalt oxide (SCO) on demand by running a charge through it after adding … [Read more...]
“All new vehicles sold must be electric by 2030” but can your nation, state, city do it?
More and more nations, states and cities are announcing plans for the ramping up of EV adoption. Jim Conca takes a look at his home, Washington State in the U.S., where all new vehicles sold must be electric by 2030. He says the new rules imply his state will have 4 million EVs on the road by 2045, up from 52,000 today. He carefully crunches the numbers to see if this target is realistic. The good news is that grid capacity will only need to rise … [Read more...]
UK’s COP26 Presidency will be the first big test of its post-Brexit diplomatic skills
November’s COP26 will arguably be the most important since the Paris Climate Agreement of 2015. By then, all signatory nations are required to submit their new and improved nationally determined contributions (NDCs) that set a credible pathway towards reducing their emissions. So far only the Marshall Islands, Suriname, and Norway have done so. Lucien Chabason and Lola Vallejo at IDDRI ask whether the UK teams behind their new COP26 President, … [Read more...]