Korean Journal of Air-Conditioning and Refrigeration Engineering (설비공학논문집)

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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An Experimental Investigation on the Variation of Heating Performance Due to the Refrigerant Flow Control in a Variable-Speed Heat Pump

가변속 열펌프의 냉매 유량제어에 의한 난방성능 변화에 관한 실험적 연구

  • 김봉훈 (대구대학교 자동차·산업·기계공학부)
  • Published : 2001.08.01
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Abstract

An experimental study was conducted to investigated the effect of refrigerant flow control on the performance of a variable-speed heat pump operating in both cooling and heating mode. For this purpose, cooling and heating capacity, EER and refrigerant mass flow rate corresponding to an electronic valve as well as a capillary tube were measured as functions of compressor speed, length of capillary tube (or valve opening of the electronic valve), refrigerant charge, and outdoor temperature. From the comparison of experimental results, it was found that the performance variation due to the electronic valve opening became significant as the operating conditions(outdoor temperature and compressor speed) deviated from the standard condition at which heating capacity and EER were rated for the indicated capillary tube.

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References

  1. Refrigeration and Air Conditioning Stoecker, W. F.;Jones, J. W.
  2. Korean Journal of Air-Conditioning and Refrigeration Engineering v.10 no.2 The effect on the seasonal performance of an inverter compressor with higher and lower operating range Park,Y.C.;Ha,D.Y.;Min,M.K.
  3. CONF-841231 A comparative analysis of single and continuously variable-capacity heat pump concepts Rice, C. K.;Fisher, S. K.
  4. Korean Journal of Air-Conditioning and Refrigeration Engineering v.9 no.1 An experimental study on the performance of inverter heat pump with a variation of frequency and capillary size Choi,J.M.;Kim,Y.C.;Kim,J.Y.;Bae,Y.D.
  5. ASHRAE Transaction v.99 Influence of the expansion device on air-conditioner system performance characteristics under a range of charging conditions Farzad,M.
  6. ASHRAE Trans. v.93 A study of primary effects of various means of refrigerant flow control and capacity control on the seasonal performance of a heat pump Krakow, K. I.;Lin, S.;Matsuki, K.
  7. ASHRAE Trans. v.97 Modeling of steady flows of R-22 through capillary tubes: test data Kuehl, S. J.;Goldschmidt, V. W.
  8. ASHRAE Standard ANSI/ASHRAE 116-1983 Methods of testing for seasonal efficiency of unitary air-conditioners and heat pumps ASHRAE
  9. JIS B 8615-1884 Testing methods for unitary air conditioners JIS
  10. ARI Standard 210/240 Unitary air-conditioning and air-source heat pump equipment ARI
  11. MS thesis, Texas A&M University The impact of charge on performance of and air-to-air heat pump for R22 and three binary blends of refrigerants 32 and 134a Robinson,J.H.