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초록· 키워드

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In order to improve the performance of a 2 room heat pump with a constant speed compressor, the optimum refrigeration circuit of the heat pump with different cooling and heating capacities is developed by applying capillary tubes. The refrigeration circuit is composed of four parts; a heating circuit, a cooling circuit, a by-pass circuit and a balance circuit. The performance of the 2 room heat pump are investigated from a rating experiment and a reliability experiment, using the calorimeter. Results of the rating experiment show that the capacity of heat pump is about 93% of the design value. In particular, the capacity of the cooling single operation is about 13% higher than the design value, and the capacity of the heating multi operation is about 5% higher than the design value. From the reliability experiment, it is found that the lowest driving voltage of the compressor is about 75% of the rating voltage. Also the compressor is reoperated normally under the flood back and the over load.

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ABSTRACT

1. Introduction

2. Experimental apparatus and method

3. Design of refrigeration circuit

4. Experimental results

5. Conclusions

Acknowledgements

References

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UCI(KEPA) : I410-ECN-0101-2009-553-015269659