Publisher : The Society of Air-Conditioning and Refrigerating Engineers of Korea
DOI : 10.6110/KJACR.2015.27.10.537
Title & Authors
An Experimental Study on the Heat Transfer Performance of an Air-Source Heat Pump Using a PCM Unit for Continuous Heating Chang, Min; Jung, Dong Il; Jung, Jong Ho; Kim, Yongchan;
Air-source heat pumps are widely used in winter as heating units due to their higher efficiency compared to electronic heaters or gas fired equipment. However, the air-source heat pump can cause discomfort during periodic defrosting operations. In this study, a PCM unit for continuous heating was adopted to solve this problem. The PCM unit consisted of a PCM, a heat exchanger, and control valves. It was installed between the outdoor and indoor units. The performance of the proposed system was measured during both defrosting and heating operations. The indoor unit showed an average leaving temperature of after adopting the PCM unit for continuous heating during the defrosting operation.
Recent Progress in Air-Conditioning and Refrigeration Research : A Review of Papers Published in the Korean Journal of Air-Conditioning and Refrigeration Engineering in 2015, Korean Journal of Air-Conditioning and Refrigeration Engineering, 2016, 28, 6, 256
Qu, M., Xia L., Deng S., and Jiang Y., 2012, An experimental investigation on reverse-cycle defrosting performance for an air source heat pumpusing an electronic expansion valve, Applied Energy, Vol. 97, pp. 327-333.
Ding, Y., Ma, G. Y., and Chai, Q. H., 2004, Experiment investigation of reverse cycle defrosting methods on air source heat pump with TXV as the throttle regulator, Int. J. Refrigeration, Vol. 27, pp. 671-678.
Kamil, K., 1994, Performance of an air-to-air heat pump under frosting and defrosting conditions, Applied Energy, Vol. 48, pp. 225-241.
Jang, J. Y., Bae, H. H., Lee, S. J., and Ha, M. Y., 2013, Continuous heating of an air-source heat pump during defrosting and improvement of energy efficiency, Applied Energy, Vol. 110, pp. 9-16.
Jeon, C. D., 2013, Performance improvement technology on a continuous heating heat pump at frost condition, Journal of the Academia-Industrial cooperation Society, Vol. 14, No. 2, pp. 573-577.
Qu, M., Xia, L., Deng, S., and Jiang, Y., 2010, Improved thermal comfort during defrost with a novel reverse- cycle defrosting method for air source heat pumps, Building and Environment, Vol. 45, pp. 2354-2361.
Huang, D., Li, Q., and Yuan, X., 2009, Comparison between hot-gas bypass defrosting and reverse-cycle defrosting methods on an air-to-water heat pump, Applied Energy, Vol. 86, pp. 1697-1703.
Hoffenbecker, Kelin, S.A., and Reindl, D. T., Hot gas defrost model development and validation, Int. J. Refrigeration. Vol. 28, pp. 605-615.
Choi, H. J., Kim, B. S., Kang, D. H., and Kim, K. C., 2011, Defrosting method adopting dual hot gas bypass for an air-to-air heat pump, Applied Energy, Vol. 88, pp. 4544-4555.