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Free-Piston Stirling Coolers for Intermediate Lift Temperatures
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English
Abstract
Irreversibilities in Stirling cycle coolers are discussed with reference to designing machines for operation at warmer temperatures rather than cryogenic applications. It is shown that the sensitivity of the cycle to some losses is dependent on the temperature ratio. The free-piston configuration employs a linear motor which greatly reduces side loads and facilitates the implementation of non-contact gas bearings. Mechanism efficiencies are therefore much higher than in crank machines which leads to an overall performance advantage. It is expected that an optimized free-piston Stirling refrigerator cooler could exceed 60% of Carnot overall (COP ≧ 2.3).
Authors
Citation
Berchowitz, D., "Free-Piston Stirling Coolers for Intermediate Lift Temperatures," SAE Technical Paper 929039, 1992, https://doi.org/10.4271/929039.Also In
References
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- Berchowitz D.M. Stirling Cycle Engine Design and Optimisation University of the Witwatersrand Johannesburg, South Africa August 1986
- Berchowitz D.M. Unger R. “Experimental Performance of a Free-Piston Stirling Cycle Cooler for Non-CFC Domestic Refrigeration Applications” XVIII International Congress of Refrigeration Inc. Montréal, Canada August 1991 848 852
- Fabien M.J. “Evaluation of the Free-Piston Stirling Cycle for Domestic Cooling Applications” XVIII th International Congress of Refrigeration Inc. Montréal, Canada August 1991 839 843