HFC系混合冷媒を用いた蒸気圧縮式ヒートポンプシステムの性能評価 - 冷房モードの場合 -

Translated title of the contribution: The Performance Evaluation of Vapor Compression Heat Pump System Using HFC Alternative Refrigerant Mixtures - In the case of cooling mode -

平良 繁治, 矢嶋 龍三郎, 樽谷 勇, 小山 繁

Research output: Contribution to journalArticle

Abstract

This paper deals with an experimental study on the performance evaluation of heat pump systems using HFC alternative refrigerants. The tested heat pump systems are modified from the R22 use to alternative refrigerants. Refrigerant mixtures of R410A, R407C. R32/125 and R32/134a are tested. where R410A and R407C launched into global market recently. Pure refrigerants of R22, R32, R125 and R134a are also tested. <br>The experimental results of alternative refrigerants are evaluated in comparison with the result of R22, and the following are confirmed : (1) the performance of R32 is the highest. (2) adding R125 to R32 and R32/134a results into the deterioration of the performance, (3) the use of counter flow-like heat exchangers for a zeotropic refrigerant mixtures are effective, and (4) in case of R410A. the modification of the compressor to fit operating pressure heightens the performance. The effects of the performance of components on the COP are also analyzed based on the measured thermodynamic states at both ends of components in the system. Then, it is clarified that the most effective factor is irreversibility of compressors and the following is the pressure drop in low pressure side including the evaporator and the suction pipe.
Original languageJapanese
Pages (from-to)73-83
Number of pages11
Journal日本冷凍空調学会論文集
Volume18
Issue number1
DOIs
Publication statusPublished - Mar 31 2001
Externally publishedYes

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Heat pump systems
Refrigerants
Compaction
Vapors
Cooling
Compressors
Evaporators
Pressure drop
Heat exchangers
Deterioration
Pipe
Thermodynamics

Cite this

HFC系混合冷媒を用いた蒸気圧縮式ヒートポンプシステムの性能評価 - 冷房モードの場合 -. / 平良繁治; 矢嶋龍三郎; 樽谷勇; 小山繁.

In: 日本冷凍空調学会論文集, Vol. 18, No. 1, 31.03.2001, p. 73-83.

Research output: Contribution to journalArticle

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abstract = "This paper deals with an experimental study on the performance evaluation of heat pump systems using HFC alternative refrigerants. The tested heat pump systems are modified from the R22 use to alternative refrigerants. Refrigerant mixtures of R410A, R407C. R32/125 and R32/134a are tested. where R410A and R407C launched into global market recently. Pure refrigerants of R22, R32, R125 and R134a are also tested. The experimental results of alternative refrigerants are evaluated in comparison with the result of R22, and the following are confirmed : (1) the performance of R32 is the highest. (2) adding R125 to R32 and R32/134a results into the deterioration of the performance, (3) the use of counter flow-like heat exchangers for a zeotropic refrigerant mixtures are effective, and (4) in case of R410A. the modification of the compressor to fit operating pressure heightens the performance. The effects of the performance of components on the COP are also analyzed based on the measured thermodynamic states at both ends of components in the system. Then, it is clarified that the most effective factor is irreversibility of compressors and the following is the pressure drop in low pressure side including the evaporator and the suction pipe.",
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