Ezperimental Study of the Compressor in a R410a Heat Pump Water Heater System
Nowadays, energy saving is a worldwide task under the pressure of the global energy crisis. Heat pump water heaters (HPWH) are more efficient than traditional boilers and electric heaters and therefore attrack more and more attentions. As a key componet, the compressor plays an important role in the HPWH system. To valuate the performance of a HPWH system, the compressor should be studied in details. In this paper, an experimental bench for the R410a HPWH with a variable speed compressor was developed. Subsequently, the volumetric efficiencies and the isentropic efficiencies of the compressor, whose frequency varied from 40Hz to 120Hz under different experimental conditions, were studied with the experimental bench. The experimental results indicted that the values of the volumetric efficiency varied from 0.60 to 0.80 and the values of the isentropic efficiency varied from 0.65 to 0.90.A new model was proposed in this paper to calculate the volumetric efficiencies and the isentropic efficiencies of the compressor under different working conditions and then was tested with the experimental data. For the calculation of the volumetric efficiencies, the average absolute deviation was 3.901％ and the maximum deviation was 8.344％. For the calculation of the isentropic efficiencies, the average absolute deviation and the maximum deviation were 3.065％ and -7.871％, respectively. It can be concluded that the compressor can work well under all the HPWH conditions and the new model can also work well in the calculation of the compressor performance.
R410a Variable speed compressor Volumetric efficiency Isentropic efficiency
Fengkun Wang Xiaowei Fan Zhiwei Lian Fang Wang
School of Energy & Environment Engineering,Zhongyuan University of Technology,Zhengzhou,China School of Energy & Environment Engineering,Zhongyuan University of Technology,Zhengzhou,China Instit
国际会议
The 6th International Symposium on Heating,Ventilating and Air Conditioning(第六届国际暖通空调学术会议)
南京
英文
671-678
2009-11-06（万方平台首次上网日期，不代表论文的发表时间）