가변용량 공조시스템의 난방성능에 대한 실험 연구
Experimental Study on Heating Performance of Variable Capacity A/C System
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초록
In this study, the heating performance of a variable capacity A/C system was experimentally studied. A psychrometric calorimeter was used to obtain performance data of the A/C system using PWM(pluse width modulation) method and compare it with the compressor discharge temperature correlation equation. Heating capacity, COP, and compressor discharge temperature were obtained by changing indoor and outdoor temperatures, refrigerant amount, and loading duty. The following results were obtained by selecting 5 types of refrigerant amount, 3 types of outdoor temperature (fixed indoor temperature), and 2 types of loading duty. As the outdoor temperature increases, heating capacity and COP increase. Heating capacity was affected by both outdoor temperature and loading duty. However, COP was more influenced by outdoor temperature. The effect of increasing the amount of refrigerant on the performance of the A/C system was not significant. Additionally, the temperature deviation between the existing compressor discharge temperature correlation equation and the heating experiment data was about 5.1℃ at the maximum loading duty.
Abstract
In this study, the heating performance of a variable capacity A/C system was experimentally studied. A psychrometric calorimeter was used to obtain performance data of the A/C system using PWM(pluse width modulation) method and compare it with the compressor discharge temperature correlation equation. Heating capacity, COP, and compressor discharge temperature were obtained by changing indoor and outdoor temperatures, refrigerant amount, and loading duty. The following results were obtained by selecting 5 types of refrigerant amount, 3 types of outdoor temperature (fixed indoor temperature), and 2 types of loading duty. As the outdoor temperature increases, heating capacity and COP increase. Heating capacity was affected by both outdoor temperature and loading duty. However, COP was more influenced by outdoor temperature. The effect of increasing the amount of refrigerant on the performance of the A/C system was not significant. Additionally, the temperature deviation between the existing compressor discharge temperature correlation equation and the heating experiment data was about 5.1℃ at the maximum loading duty.
참고문헌 (5)
- C. K. Rice, "Comparative analysis of single and continuously variable-capacity heat pump Concepts", Proc. of the DOE, 1985, 57~65
- Y. C. Kwon, "Performance of compressor with variable capacity", Journal of Energy Engineering, 13(3), pp.214~218 (2004)
- Y. H. Jun, "Experimental study on performance evaluation of system air-conditioner using compressor of PWM and inverter method(cooling and heating characteristics)", Korean Journal of Air-Conditioning and Refrigeration Engineering, 15(9), pp.783~743 (2003)
- D. H. Yang, "Experimental study on cooling performance characteristics of 2 room simultaneous operation of multi-A", C, 2018, pp.20(5), 612~617
- "KS C9306, Air-conditioner", Korean Agency for Technology and Standard, ~ (2017)