Let’s talk recycling: Not plastic and paper, but power…
These days, by far, the majority of electricity used in high-income countries comes from thermal power plants; these operate by heating water into steam that then spins a turbine. Thermal power plants, however, typically only use 33% to 48% of the total heat they produce. The rest just gets released into water or air. It’s a shame; if only there was a way to recycle all that ‘low-grade’ heat.
Today, 37% of the energy demand in OECD countries is for heating of buildings; only about 21% of energy demand is for electricity. We use much more energy for heating and cooling than we do for electricity. The low-grade heat that gets wasted by most power plants is still hot enough to be used for heating (and cooling) and water heating in buildings.
Why do we use so little of the heat we produce? That’s like buying a tub of fried chicken just to eat the skins!