Browse > Article
http://dx.doi.org/10.6110/KJACR.2012.24.8.605

A Study on Cooling Characteristics of Ground Source Heat Pump with Variation of Water Switching and Refrigerant Switching Methods  

Cha, Dong-An (Energy System R&D Group, Korea Institute of Industrial Technology)
Kwon, Oh-Kyung (Energy System R&D Group, Korea Institute of Industrial Technology)
Park, Cha-Sik (School of Mechanical Engineering, Hoseo University)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.24, no.8, 2012 , pp. 605-611 More about this Journal
Abstract
The objective of this study is to investigate the influence of the cooling performance for a water-to-water 10 RT ground source heat pump by using the water switching and refrigerant switching method. The test of water-to-water ground source heat pump was measured by varying the compressor speed, load side inlet temperature, and ground heat source side temperature. The cooling capacity and refrigerant mass flow rate of the heat pump increased with increasing ground heat source temperature. But COP of the heat pump decreased with increasing ground heat source temperature. As a result, the water switching method with counter flow, compared to a refrigerant switching method, improves the cooling capacity and COP by approximately 6~9% in average, respectively.
Keywords
Cooling characteristics; COP; Ground source heat pump; Refrigerant switching; Water switching;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
1 Baek, N. C., 2001, Development of off-peak electric water heater using heat pump, Energy R&D, Vol. 11, pp. 3-7.
2 Lee, J. Y., Chung, J. T., Woo, J. S., and Choi, J, M., 2010, Influence of the secondary fluid flow rate on the performance of a GSHP System, Korean Journal of Air-conditioning and Refrigeration Engineering, Vol. 22, No. 10, pp. 649-656.   과학기술학회마을
3 Hepbasli, A., 2002, Performance evaluation of a vertical ground-source heat pump system in Izmir, Turky, Int. Journal of Energy Res., Vol. 26, pp. 1121-1139.   DOI   ScienceOn
4 Hepbasli, A., Akdemir, O., and Hancioglu, E., 2003, Experimental study of a closed loop vertical ground source heat pump system, Energy Conversion and Management, Vol. 44, pp. 527- 548.   DOI   ScienceOn
5 Zhao, P. C., Zhao, L., Ding, GlL., and Zhang, C. L., 2002, Experimental research on geothermal heat pump system with non-azeotropic working fluids, Applied Thermal Engineering, Vol. 22, No. 15, pp. 1749-1761.   DOI   ScienceOn
6 Choi, J. M., Kang, S. H., Moon, J. M., and Kim, R. H., 2009, Daily heating performance of a ground source multi-heat pump at heating mode, Korean Journal of Air-Conditioning and Refrigeration Engineering, Vol. 21, No. 9, pp. 527-535.   과학기술학회마을
7 Sohn, B. H., Cho, C. S., Shin, H. J., and An, H. J., 2005, Cooling and heating performance evaluation of a GSHP system, Korean Journal of Air-Conditioning and Refrigeration Engineering, Vol. 17, No. 1, pp. 71-81.   과학기술학회마을
8 Cha, D. A., Kwon, O. K., and Park, S. G., 2011, A study on heating characteristics of ground source heat pump using water switching methods, Proceeding of the KSME, pp. 465-470.
9 Cha, D. A., Kwon, O. K., Park, C. S., and Park, S. G., 2011, A study on cooling characteristics of ground source heat pump with variation of heat exchange methods, Proceedings of the SAREK, pp. 1093-1096.
10 Cha, D. A., Kwon, O. K., Kim, H. J., Park, S. G., and Oh, M. D., 2011, The performance characteristics of ground source heat pump with change of cooling and heating, Proceedings of the SAREK, pp. 49-52.
11 KS B ISO13256-2, 2003, Water-source heat pump testing and rating for performance-Part 2：Water to water and brine to water heat pumps. Korean Standards Association.