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Heating Performance of a Ground Source Multi-Heat Pump for a Greenhouse  

Kang, Shin-Hyung (Department of Mechanical Engineering, Konyang University)
Choi, Jong-Min (Department of Mechanical Engineering, Hanbat National University)
Moon, Je-Myung (System Air Conditioning R&D Group, Samsung Electronics Co. Ltd.)
Kwon, Hyung-Jin (System Air Conditioning R&D Group, Samsung Electronics Co. Ltd.)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.22, no.6, 2010 , pp. 337-344 More about this Journal
Abstract
Good plant-growth conditions can be achieved by means of using greenhouses. One of the main issues in greenhouse cultivation is energy savings through the development of high efficient heating and cooling system. GSHPs are one of the recommended systems to cope with this pending need. The aim of this study is to investigate the heating performance of ground source multi-heat pump system installed in a greenhouse under part load conditions. Daily average heating COP of the heat pump unit was very high by at least 7.4, because of relatively large condenser, evaporator, and mass flow rate through ground loop heat exchanger. However, the system COP, overall heating coefficient of the performance of the system with heat pump unit and GLHX, decreased drastically due to relatively large power consumption of circulating pump under part load condition. It is suggested that the technology to enhance the performance of the ground source multi-heat pump system for a greenhouse under part load conditions should be developed.
Keywords
GSHP; GLHX; Greenhouse; Multi-heat pump; COP;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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1 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
2 Song, I. S., Choi, J. M., Joo, J. J., Chung. H. J., Kang, H. and Kim, Y., 2008, The performance of a simultaneous heat and cooling heat pump at various charging conditions, Korean Journal of Air-Conditioning and Refrigeration Engineering, Vol. 20, No. 7, pp. 492-499.   과학기술학회마을
3 Ozgener, O. and Hepbasli, A., 2005, Experimental performance analysis of a solar assisted ground-source heat pump greenhouse heating system, energy and Buildings, pp. 101-110.   DOI   ScienceOn
4 Inall, M. I. and Esen, H., 2004, Experimental thermal performance evaluation of a horizontal ground-source heat pump system, Applied thermal engineering, Vol. 24, pp. 2219-2232.   DOI   ScienceOn
5 Thermal Dynamics, 2008, $GLD^{TM}$ Premier Finacial 2008 Edition for Windows, Gaia Geothermal.
6 Ozgener, L., Hepbasli, A. and Dincer, I., 2007, A key review on performance improvement aspects of geothermal district heating systems and applications, Renew Sustainable Energy Rev. Vol. 11, pp. 1675-1697.   DOI   ScienceOn
7 Ministry of Knowledge Economy, 2008, Standards of support, installation, and management for new and renewable energy system, Ministry of Knowledge Enconmy Announcement, 2008-232.
8 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
9 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
10 Lund, J. W., 2005, World-wide direct uses of geothermal energy 2005, World Geothermal Congress.
11 Park, Y. and Kang, S., 2007, Performance analysis of the horizontal ground source heat pump for greenhouse, Proceedings of the SAREK 2007 Winter Annual Conference, pp. 447-451.
12 Bose, J. E., Parker, J. D. and McQuiston, F. C., 1995, Design/data manual for closed-loop ground-coupled heat pump systems, ASHRAE.
13 Choi, J. M., Lim, H., Kang, S., Moon, J. and Kim, R., 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