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CO2 and other refrigerants with low critical temperatures may be utilized in heat pumps using a trans-critical vapour compression cycle. An introduction to the trans-critical process is given. The optimization/simulation program used in the evaluation of the process is described, along with its input data. Loss distribution, and energy and volumetric efficiency of a trans-critical system are compared to those of a conventional vapour compression system at optimum cost conditions. Various aspects of the two systems are discussed. A CO2 system was found superior to an optimized R134a system utilizing super-heat and sub-cooling, for tap water heating.
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Pages: p 395-404
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Details
- Original title: Trans-critical vapour compression heat pumps.
- Record ID : 1995-2521
- Languages: English
- Source: New Applications of Natural Working Fluids in Refrigeration and Air Conditioning
- Publication date: 1994/05/10
- Document available for consultation in the library of the IIR headquarters only.
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Indexing
- Themes: Heat pumps techniques
- Keywords: Compression system; Heat pump; Performance; Optimization; Critical state; Heating; Domestic water; CO2
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