Journal of Hydrogen and New Energy (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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Performance of the Geothermal Heat Pump using Vapor Injection for Hot Water

증기분사를 적용한 고온수용 지열 히트펌프의 성능특성

  • 박용정 (대한공조(주) 기술연구소) ;
  • 박병덕 (경북대학교 자동차공학부)
  • Received : 2014.04.07
  • Accepted : 2014.06.30
  • Published : 2014.06.30
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Abstract

The purpose of this study is to evaluate the experimental performance characteristics of a water-to-water geothermal heat pump featuring a vapor refrigerant injection for the production of hot water. The performance of geothermal heat pump with a vapor injection was evaluated by comparing with that of a conventional geothermal heat pump without a vapor injection. For heating operation, the geothermal heat pump with a vapor injection is superior in COP and heating capacity. The vapor injection was more effective for supplying hot water while overloading. The vapor injection was effective for the improvement of the cooling capacity. However, the vapor injection was not effective for the increasing of COP according to the increased input of a compressor. The advantage of vapor injection in water-to-water geothermal heat pump become disappeared while cooling operation with lower part loading.

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References

  1. M. Saito, "Packaged Air Conditioners that Improve the Heating Capacity by Flash Injection Circuit", Journal of Refrigeration, Vol. 82, No. 952, 2007, pp.19-22.
  2. X. Xu, Y. Hwang, and R. Radermacher, "Refrigerant Injection for Heat Pumping/Air Conditioning Systems: Literature Review and Challenges Discussions", Int. Journal of Refrigeration, Vol. 34, No. 2, 2011, pp. 402-415. https://doi.org/10.1016/j.ijrefrig.2010.09.015
  3. J. Heo, M. Jeong, C. Baek, and Y. Kim, "Comparison of the Heating Performance of Air-Source Heat Pumps using Various Types of Refrigerant Injection", Int. Journal of Refrigeration, Vol. 34, No. 2, 2011, pp. 444-453. https://doi.org/10.1016/j.ijrefrig.2010.10.003
  4. H. Heo, H. Kang, and Y. Kim, "Optimum Cycle Control of a Two-Stage Injection Heat pump with a Double Expansion Sub-Cooler", Int. Journal of Refrigeration, Vol. 35, No. 1, 2012, pp. 58-67. https://doi.org/10.1016/j.ijrefrig.2011.09.005
  5. F. Cao, F. Jiyou, X. Ziwen, and L. Liansheng, "Study on Performance of a Heat Pump Water Heater using Suction Stream Liquid Injection", Applied Thermal Engineering, Vol. 29, 2009, pp. 2942-2948. https://doi.org/10.1016/j.applthermaleng.2009.03.001
  6. F. Cao, K. Wang, S. Wang, Z. Xing, and P. Shu, "Investigation of Heat Pump Water Heater using Economizer Vapor Injection System and Mixture of R22/R600a", Int. Journal of Refrigeration, Vol. 32, 2009, pp. 509-514. https://doi.org/10.1016/j.ijrefrig.2008.06.012
  7. C. W. Roh, M. S. Kim, "Comparison of the Heating Performance of an Inverter-Driven Heat Pump System using R410a Vapor Injection into Accumulator and Compressor", Int. Journal of Refrigeration, Vol. 35, 2012, pp. 434-444. https://doi.org/10.1016/j.ijrefrig.2011.10.013
  8. M. W. Jeong, J. Heo, H. W. Jung, and Y. Kim, "The Cooling Performance Enhancement of a Variable Speed Heat Pump using Gas Injection Technique", Korean Journal of Air-Conditioning and Refrigeration Engineering, Vol. 21, No. 8, 2009, pp. 425-432.
  9. Y. Lee, and Y. Baik, "A Study on the Part-Load Performance of 2-Stage Water Source Heat Pump", Trans. of the Korea Society of Geothermal Energy Engineer, Vol. 5, No. 1, 2009, pp. 13-17.
  10. KEMCO, "Water-to-Water Ground Source Heat Pump", NR GT 101, Yongin, Korea, 2013.
  11. KEMCO, "Water-to-Air Ground Source Heat Pump", NR GT 102, Yongin, Korea, 2013.
  12. KEMCO, "Water-to-Air Ground Source Multi- Heat Pump", NR GT 103, Yongin, Korea, 2013.