A new engine converts waste hot water from industrial equipment into electricity.
Exergyn, a startup based in Dublin, Ireland, is planning to run the first industrial trials of the new energy-efficient engine by next year, New Scientist reports. The engine generates electricity from heated water that is left over from other equipment. According to co-founder and chief executive Alan Healy, waste hot water (low-grade waste heat or LGWH) from industrial processes amounts to about twice the energy in Saudi Arabia's oil and gas output per year.