Tag Archive: Concentrated Solar Thermal

Aug 18 2014

Sunday Train: The Two Transitions to A Renewable Electricity Supply

The topic for this week’s Sunday Train was brought to my mind when I listened to the Energy Gang podcast. They were discussing the question of whether “CSP (that is, concentrated thermal solar power) is dead”, and the always entertaining, but not uniformly informative, “energy futurist” Jigar Shah declared that “CSP is dead” (segment starts 30:29), backing the claim up with a set of bullet points that fell far short of supporting the claim. And listening to the set of bullet points, it seemed to me that he was talking in the context of the phase of the transition to renewable energy that we are presently in, and ignoring the phase of the transition that we will have to pass through if we are to survive as a national economy and national economy.

In short, he seemed to be talking more as an energy presentist than an energy futurist, claiming that there was no plausible position for solar CSP power based on both the technology currently rolled out for a technology that is experiencing rapid development, and on context of renewable energy being added to an energy system which is untenable over the long term.

But I do not mean to single out Jigar Shah, since as I have recently been exploring various discussion spaces talking about various issues in the roll-out of renewable energy, cross-talk between the different phases of the transition to renewable energy seems to be commonplace. So what I wish to write about this Sunday afternoon is the “Two Transitions” to renewable energy: the Current Transition and the Next Transition.

Aug 12 2013

Sunday Train: The Myth of Baseload Power

cross-posted from the Sunday Train origin station Voices on the Square

In Baseload power is a myth: even intermittent renewables will work, Mark Diesendorf, Asst. Professor and Deputy Director of the Institute of Environmental Studies at the University of New South Wales (Australia), writes:

The old myth was based on the incorrect assumption that base-load demand can only be supplied by base-load power stations; for example, coal in Australia and nuclear in France. However, the mix of renewable energy technologies in our computer model, which has no base-load power stations, easily supplies base-load demand. Our optimal mix comprises wind 50-60%; solar PV 15-20%; concentrated solar thermal with 15 hours of thermal storage 15-20%; and the small remainder supplied by existing hydro and gas turbines burning renewable gases or liquids. (Contrary to some claims, concentrated solar with thermal storage does not behave as base-load in winter; however, that doesn’t matter.)

Anyone who engages in online discussion on issues involving renewable energy for any length of time will encounter the myth that renewable energy is unreliable in supplying base-load demand. This myth is pushed into the discussion with substantial financial investment, directly and indirectly, by vested interests in continued reliance on the Global Suicide Pact power sources of coal, petroleum, and natural gas. Writing from Australia, Mark Diesendorf flags the use of the Murdoch press empire in propagating this myth. Here in the United States, the myth is promoted by both Big Coal and Big Oil funded propaganda mills ~ including those libertarian “think tanks” that argue against the government getting involved in defending our economy from the prospect of collapse in the face of climate chaos …

… because the “free market”, together with billions of dollars of government subsidies for fossil fuel industry and tens or hundreds of billions of unfunded third party costs of fossil fuel consumption, will surely choose best.