Heat Pump System with R 22/R 114 Mixtures as Working Fluid (1st Report, Effects of Refrigerant Composition and Heat Source Condition on COP)

Hiroshi Takamatsu, Shigeru Koyama, Yasuyuki Ikegami, Takemi Kamogawa, Tomoyasu Yara, Tetsu Fujii

研究成果: ジャーナルへの寄稿記事

抄録

The performance of a heat pump system is tested using an R 22/R 114 refrigerant mixture of 0, 50, 75 and 100 mol% R 22 as the working fluid. Double pipe counterflow heat exchangers of 12 m in length with a smooth inner tube of 22.4 mm I. D. are used for the condenser and evaporator. The effects of inlet temperature, temperature change and flow rate of the heat source water and heat load on COP are clarified. The COP for the mixture is found to be lower than that for pure refrigerant because of the lower heat transfer coefficient in condenser and evaporator. However, a trial calculation shows that the COP of the mixture becomes higher than that of pure refrigerant in the case of a large change in the water temperature if the heat transfer coefficient is twice as large as that of the experimental value and the superheating of the refrigerant is zero at the exit of the evaporator.

元の言語英語
ページ(範囲)1851-1857
ページ数7
ジャーナルTransactions of the Japan Society of Mechanical Engineers Series B
57
発行部数537
DOI
出版物ステータス出版済み - 1 1 1991

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heat pumps
Heat pump systems
working fluids
refrigerants
Refrigerants
heat sources
evaporators
Evaporators
Fluids
condensers
heat transfer coefficients
Chemical analysis
Heat transfer coefficients
superheating
inlet temperature
water temperature
counterflow
heat exchangers
Thermal load
Temperature

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanical Engineering

これを引用

Heat Pump System with R 22/R 114 Mixtures as Working Fluid (1st Report, Effects of Refrigerant Composition and Heat Source Condition on COP). / Takamatsu, Hiroshi; Koyama, Shigeru; Ikegami, Yasuyuki; Kamogawa, Takemi; Yara, Tomoyasu; Fujii, Tetsu.

:: Transactions of the Japan Society of Mechanical Engineers Series B, 巻 57, 番号 537, 01.01.1991, p. 1851-1857.

研究成果: ジャーナルへの寄稿記事

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abstract = "The performance of a heat pump system is tested using an R 22/R 114 refrigerant mixture of 0, 50, 75 and 100 mol{\%} R 22 as the working fluid. Double pipe counterflow heat exchangers of 12 m in length with a smooth inner tube of 22.4 mm I. D. are used for the condenser and evaporator. The effects of inlet temperature, temperature change and flow rate of the heat source water and heat load on COP are clarified. The COP for the mixture is found to be lower than that for pure refrigerant because of the lower heat transfer coefficient in condenser and evaporator. However, a trial calculation shows that the COP of the mixture becomes higher than that of pure refrigerant in the case of a large change in the water temperature if the heat transfer coefficient is twice as large as that of the experimental value and the superheating of the refrigerant is zero at the exit of the evaporator.",
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AU - Ikegami, Yasuyuki

AU - Kamogawa, Takemi

AU - Yara, Tomoyasu

AU - Fujii, Tetsu

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AB - The performance of a heat pump system is tested using an R 22/R 114 refrigerant mixture of 0, 50, 75 and 100 mol% R 22 as the working fluid. Double pipe counterflow heat exchangers of 12 m in length with a smooth inner tube of 22.4 mm I. D. are used for the condenser and evaporator. The effects of inlet temperature, temperature change and flow rate of the heat source water and heat load on COP are clarified. The COP for the mixture is found to be lower than that for pure refrigerant because of the lower heat transfer coefficient in condenser and evaporator. However, a trial calculation shows that the COP of the mixture becomes higher than that of pure refrigerant in the case of a large change in the water temperature if the heat transfer coefficient is twice as large as that of the experimental value and the superheating of the refrigerant is zero at the exit of the evaporator.

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