Waste Heat Engine
Cyclone Power Tech tests its Waste Heat Engine. ...
... "The WHE is a self-starting, external combustion engine that operates in a low pressure, low temperature range. This feature allows the engine to run on waste heat emanating from an external source, such as the exhaust from an internal (or external) combustion engine, or the direct burning of biomass (i.e., processing garbage into methane is not required). The WHE is also designed to run efficiently on solar heat without the installation of costly photovoltaic panels. " ...
Via Cyclone Power Technologies: Test Engine That Runs on Waste or Solar Heat
Related:
U.S. Department of Energy Tips: Waste Heat Recovery PDF: "For most fuel-fired heating equipment, a large amount of the heat supplied is wasted as exhaust or flue gases. "
R. Gordon Bloomquist, Washington State University Energy Program, discusses Waste Heat to Power (PDF): "Waste Heat is one of our most under-utilized energy resources ... "
Stirling Engine: "The MM-7 Stirling engine will run on a temperature difference of only 7.2 degrees F (4 degrees C). "
WHE Waste Heat Engine: "This feature allows the engine to run on waste heat emanating from an external source. "