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 Study on the Performance of an Inverter Heat Pump with a Variation of Frequency and Refrigerant Charging Amount

인버터 열펌프의 주파수 및 냉매봉입량 변화에 따른 시스템 성능특성의 실험적 연구

  • 최득관 (LG전자 디지털어플랑이언스연구소) ;
  • 김경천 (부산대학교 기계공학과) ;
  • 김주상 (LG전자 디지털어플랑이언스연구소)
  • Published : 2001.01.01
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Abstract

In the air-conditioning industry, the refrigerant charging amount is one of the most important parameters affecting the energy efficiency ratio of heat pumps. An experimental study was performed on the characteristics of an inverter driven air-to-air heat pump system with a variation of compressor frequency and charging amount of refrigerant. The frequency was altered from 40Hz to 70Hz and the charging amount was changed from 1.6kg to 2.8kg in tests. The variation of performance was measured with switching of the expansion valve on each frequency and charging amount. All the tests were performed at the Korean Standard and test conditions of the air conditioners. As results, it was found that there existed the charging amount and the level of the suction gas superheat which provided the highest energy efficiency ratio at all the frequency bands.

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References

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