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Proceedings of Symposium on Energy Engineering in the 21<sup>st</sup> Century (SEE2000) Volume I-IV

ISSN:
1-56700-132-7 (Print)

PERFORMANCE COMPARISON AND ANALYSIS FOR INVERTER-DRIVEN AIR CONDITIONERS THROTTLING WITH ELECTRONIC EXPANSION VALVE

Bingfeng Yu
School of Energy and Power Engineering Xi'an Jiaotong University Xi'an 710049, P.R.China

Zhigang Wang
School of Energy and Power Engineering Xi'an Jiaotong University Xi'an 710049, P.R.China

Xiangzhao Meng
School of Energy and Power Engineering Xi'an Jiaotong University Xi'an 710049, P.R.China

Abstract

In this paper, the performances variation of a refrigerating system of the small capacity inverter-driven air conditioner at the different operating frequencies using the electronic expansion valve and capillary tube individually are analyzed. The mathematical models and the steady model of the refrigerating system which have been verified by the experiments. The analysis shows that more advantages could be obtained for the air conditioner with the electronic expansion valve at the frequencies of 20Hz-120Hz, however, the air conditioner applying the capillary tube has the acceptable performance in the major frequency range of 40Hz-80Hz at the most time so that it is feasible for the small capacity inverter-driven air conditioner to employ the capillary tube as the throttling device.