Energy-efficient engine turns waste hot water into electricity (New Scientist)
So says Exergyn, a firm based in Dublin, Ireland, which plans to run the first industrial trials of its technology next year.
In addition to harnessing waste heat from industry, the company hopes that the engine could expand the geothermal energy market. At the moment, generating electricity from geothermal sources in a cost-effective manner requires very hot water at high flow rates. That typically means digging very deep wells with a wide diameter, which hugely increases drilling costs. Mike Langdon, Exergyn’s head of product management says that Exergyn’s technology makes a broader range of geothermal sites viable, as it works with water at a lower temperature and flow.