DOE EERE Research Reports
Thermally Activated Heat Pumps
Engine Driven Heat Pumps: Internal Combusion (IC) Engines, Stirling Engines, Brayton Cycle, and Rankine Engines
Heat engines can be used to drive a refrigerant compressor in a reverse Rankine heating or cooling cycle. While engines may use
recovered waste heat or solar energy as the motive force, most use either liquid or gaseous fossil fuel combustion. The Department of Energy (DOE)
funded developments in:
- free piston Stirling engine (FPSE) driven compressors,
- internal combustion (IC) engine technologies,
- Steam/Rankine engine driven systems, and
- Brayton Cycle (Air Cycle)/Rankine engine driven systems.