Transactions of the KSME C: Technology and Education (대한기계학회논문집 C: 기술과 교육)

The Korean Society of Mechanical Engineers (대한기계학회)
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Performance Analysis of Cooling Tower-Assisted Hybrid Ground-Coupled Heat Pump (HGCHP) System

냉각탑 병용 하이브리드 지열 히트펌프 시스템의 성능 분석

  • Sohn, Byonghu (Building and Urban Research Institute, Korea Institute of Civil Engineering and Building Technology) ;
  • Lee, Doo-Young (Research Development Division, KOTEC Engineering) ;
  • Choi, Jae-Ho (Research Development Division, KOTEC Engineering) ;
  • Min, Kyong-Chon (Research Development Division, KOTEC Engineering)
  • 손병후 (한국건설기술연구원 건축도시연구소) ;
  • 이두영 (코텍엔지니어링(주) 기술연구소) ;
  • 최재호 (코텍엔지니어링(주) 기술연구소) ;
  • 민경천 (코텍엔지니어링(주) 기술연구소)
  • Received : 2015.12.21
  • Accepted : 2016.02.03
  • Published : 2016.03.01
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Abstract

This paper presents the measurement and analysis results for the performance of HGCHP system using a cooling tower as a supplemental heat rejector. In order to demonstrate the performance of the hybrid approach, we installed the monitoring equipments including sensors for measuring temperature and power consumption, and measured operation parameters from February 1, 2014 to February 28, 2015. Leaving load temperatures to building showed an average value of $11.7^{\circ}C$ for cooling and $39.5^{\circ}C$ for heating, respectively. From the analysis, the daily PF of hybrid GCHP system varied from 2.6 to 6.6 over the measurement period.

하이브리드 지열 히트펌프 시스템은 열원을 안정적으로 유지하기 위해 보조 히트싱크나 보조 열원을 활용한다. 본 연구에서는 병원 건물에 설치한 지열-냉각탑 하이브리드 시스템의 냉난방 성능을 분석하였다. 시스템에 각종 센서와 계측 장비를 설치하였으며, 2014년 2월부터 2015년 2월까지 측정한 데이터를 이용하여 성능을 분석하였다. 냉방 기간 중, 냉수 공급 온도는 평균 $11.7^{\circ}C$이었으며, 설계 온도인 $12^{\circ}C$를 넘지 않았다. 또한 난방 기간 중에는 일평균 $39^{\circ}C{\sim}40^{\circ}C$의 온수를 공급하였다. 지열 히트펌프만의 월 평균 성능지수는 3.8에서 8.4의 범위에서 변하였다. 반면 냉각탑을 포함한 하이브리드 지열시스템의 월 평균 성능지수는 2.6에서 6.6 사이에서 변하였다.

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References

  1. Kavanaugh, S., 1998, "A Design Method for Hybrid Ground-Source Heat Pump," ASHRAE Transactions, Vol. 104, pp. 691-698.
  2. Qi, Z., Gao, Q., Liu, Y., Yan, Y., and Spitler, J., 2014, "Status and Development of Hybrid Energy Systems from Hybrid Ground Source Heat Pump in China and Other Countries," Renewable and Sustainable Energy Reviews, Vol. 29, pp. 37-51. https://doi.org/10.1016/j.rser.2013.08.059
  3. Fan, R., Gao, Y. Hua, L., Deng, X., and Shi, J., 2014, "Thermal Performance and Operation Strategy Optimization for a Practical Hybrid Ground-Source Heat-Pump System," Energy and Buildings, Vol. 78, pp. 238-247. https://doi.org/10.1016/j.enbuild.2014.04.041
  4. Nguyen, H. V., Law, Y. L. E., Alavy, M., Walsh, P., Leong, W., and Dworkin, S., 2014, "An Analysis of the Factors Affecting Hybrid Ground-Source Heat Pump Installation Potential in North America," Applied Energy, Vol. 125, pp. 28-38. https://doi.org/10.1016/j.apenergy.2014.03.044
  5. Wang, S., Liu, X., and Gates, S., 2015, "Comparative Study of Control Strategies for Hybrid Gshp System in the Cooling Dominated Climate," Energy and Buildings, Vol. 89, pp. 222-230. https://doi.org/10.1016/j.enbuild.2014.12.054
  6. Sohn, B. and Kwon, H. S., 2014, "Performance Prediction on the Application of a Ground-Source Het Pump(GSHP) System in an Office Building," Korean Journal of Air-Conditioning and Refrigeration Engineering, Vol. 26, No. 9, pp. 409-415. https://doi.org/10.6110/KJACR.2014.26.9.409
  7. Sohn, B., Choi, J. H., and Min, K. C., 2015, "Heating Performance of Geothermal Heat Pump System Applied in Cold Climate Region(Mongolia)," Korean Journal of Air-Conditioning and Refrigeration Engineering, Vol. 27, No. 1, pp. 31-38. https://doi.org/10.6110/KJACR.2015.27.1.031
  8. Phetteplace, G. and Sullivan, W., 1998, "Performance of a Hybrid Ground-Coupled Heat Pump System," ASHRAE Transactions, Vol. 104, pp. 763-770.
  9. Hackel, S. and Pertzborn, A., 2011, "Effective Design and Operation of Hybrid Ground-Source Heat Pumps: Three Case Studies," Energy and Buildings, Vol. 43, pp. 3497-3504. https://doi.org/10.1016/j.enbuild.2011.09.014
  10. Pertzborn, A., Hackel, S., Nellis, G., and Klein, S., 2011, "Experimental Validation of a Ground Het Exchanger Model in a Hybrid Ground Source Heat Pump," HVAC&R Research, Vol. 17, pp. 1101-1114.