Korean Journal of Air-Conditioning and Refrigeration Engineering (설비공학논문집)

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
권호 표지
DOI QR코드

DOI QR Code

Performance Optimization of a Hybrid Ground Source Heat Pump According to Secondary Flow Distribution Ratio between the Ground and the Supplemental Loop

지중 및 보조루프의 2차 유체 유량 분배비를 통한 하이브리드 지열히트펌프의 성능 최적화 연구

  • Lee, Joo-Seong (Department of Mechanical Engineering, Graduate School of Korea University) ;
  • Park, Hong-Hee (Department of Mechanical Engineering, Graduate School of Korea University) ;
  • Kim, Won-Uk (Department of Mechanical Engineering, Graduate School of Korea University) ;
  • Kim, Yong-Chan (Department of Mechanical Engineering, Korea University)
  • Received : 2011.08.19
  • Published : 2012.02.10
Download PDF
⟨ Previous Next ⟩

Abstract

The objective of this study is to improve the performance of a hybrid ground source heat pump (HGSHP) by optimizing the flow distribution ratio of secondary fluid flow rate between a ground loop and a supplemental loop. Initially, a conventional ground source heat pump (GSHP) was tested to determine an optimum flow rate of the secondary fluid. Based on the selected optimum value, the HGSHP was also tested by varying the flow distribution ratio of the secondary fluid flow rate between the ground loop and the supplemental loop, such as 9:1, 7:3, 5:5, and 3:7. The results showed that the optimum flow distribution ratio of the secondary fluid flow rate was 7:3. The COP of the HGSHP was improved by 19% over the GSHP at a flow distribution ratio of 7:3 and an entering water temperature of $40^{\circ}C$.

Keywords

References

  1. Hackel, S. and Nellis, G., 2008, Optimization of hybrid geothermal heat pump systems, 9 International IEA Heat Pump Conference, Zurich, Conf-ID 4.14, pp. 1-12.
  2. Man, Y., Yang, H., and Fang, J., 2008, Study on hybrid ground-coupled heat pump systems, Energy and Buildings, Vol. 40, pp. 2826-2833.
  3. Man, Y., Yang, H., and Wang, J., 2010, Study on hybrid ground-coupled heat pump system for air-conditioning in hot-weather areas like Hong Kong, Applied Energy, Vol. 87, pp. 2826- 2833. https://doi.org/10.1016/j.apenergy.2009.04.044
  4. Park, H., Kim, W., Jeon, J., and Kim, Y., 2010, Optimization of a hybrid ground source heat pump using the response surface method, Proceedings of the SAREK 2010 Summer Annual Conference, pp. 611-616.
  5. Yavuzturk, C. and Spitler, J. D., 2000, Comparative study of operating and control strategies for hybrid ground-source heat pump systems using a short time step simulation model, ASHRAE Trans., Vol. 106, No. 2, pp. 192- 209.
  6. ASHRAE, 1995, Commercial/institutional ground- source heat pump engineering manual, American Society of Heating, Refrigerating and Air-conditioning, Inc.
  7. Kavanaugh, S. P. and Rafferty, K., 1997, Ground- source heat pumps:design of geothermal system for commercial and institutional buildings, American Society of Heating, Refrigerating and Air-conditioning, inc.
  8. Yavuzturk, C. and Spitler, J. D., 2000, Comparative study of operating and control strategies for hybrid ground-source heat pump systems using a short time step simulation model, ASHRAE Trans, Vol. 106, No. 2, pp. 192-209.
  9. Nam, Y., Ooka, R., and Shiba, Y., 2010, Development of dual-source hybrid heat pump system using ground water and air, Applied Energy, Vol. 40, pp. 909-916.
  10. Jeon, J., Lee, S., Hong, D., and Kim, Y., 2010, Performance evaluation and modeling of a hybrid cooling system combining a screw water chiller with a ground source heat pump in a building, Energy, Vol. 35, pp. 2006-2012. https://doi.org/10.1016/j.energy.2010.01.016
  11. Lee, J. Y., Chung, J. T., Woo, J., and Choi, J. M., 2010, Influence of secondary fluid flow rate on the performance of a GSHP system, Korean Journal of Air-Conditioning and Refrigeration Engineering, Vol. 22, pp. 649-656.
  12. ISO, 1998, Water-source heat pump testing and rating for performance; Part 2:Waterto- water and brine-to-water heat pumps, ISO 13256-2.