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- W147098452 abstract "A free-piston Stirling engine (FPSE) driven heat pump will tend either to stall or to overstroke if the FPSE power output is not controlled or matched to the compressor power requirement. Ambient temperature variations can create large changes in the power required to compress the refrigerant. An analysis was performed to investigate power control options for FPSE heat pumps. Six different FPSE power control methods were analyzed to determine their effect on the thermal performance of a heat pump system. The six control options are: (1) a displacer gas spring average volume control; (2) a displacer gas spring damping valve control; (3) a displacer alternator control; (4) an engine average pressure control; (5) an engine compression space average volume control; and (6) a compressor clearance volume control. Predicted engine efficiencies were best for control options 4 and 6, and worst for options 2 and 3. The heat pump heating and cooling capacities were most nearly optimum for option 3, and worst for option 4." @default.
- W147098452 created "2016-06-24" @default.
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- W147098452 date "1987-06-05" @default.
- W147098452 modified "2023-09-24" @default.
- W147098452 title "Evaluation of Power Control Methods for Free-Piston Stirling Engine Driven Heat Pumps" @default.
- W147098452 doi "https://doi.org/10.2514/6.1987-9412" @default.
- W147098452 hasPublicationYear "1987" @default.
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