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

Heating and Cooling Performance Analysis of Ground Source Heat Pump System in Low Energy House

저에너지주택의 지열히트펌프시스템 냉·난방 성능분석

  • Baek, Namchoon (Solar Thermal Laboratory, Korea Institute of Energy Research) ;
  • Kim, Sungbum (Department of Architectural Engineering, Graduate School of Daejeon University) ;
  • Shin, Ucheul (Department of Architectural Engineering, Daejeon University)
  • 백남춘 (한국에너지기술연구원 태양열연구실) ;
  • 김성범 (대전대학교 건축공학과 대학원) ;
  • 신우철 (대전대학교 건축공학과)
  • Received : 2016.04.30
  • Accepted : 2016.08.25
  • Published : 2016.10.10
Download PDF
⟨ Previous Next ⟩

Abstract

A ground source heat pump system maintains a constant efficiency due to its stable heat source and radiant heat temperature which provide a more effective thermal performance than that of the air source heat pump system. As an eco-friendly renewable energy source, it can reduce electric power and carbon dioxide. In this study, we analyzed one year of data from a web based remote monitoring system to estimate the thermal performance of GSHP with the capacity of 3RT, which is installed in a low energy house located in Daejeon, Korea. This GSHP system is a hybrid system connected to a solar hot water system. Cold and hot water stored in a buffer tank is supplied to six ceiling cassette type fan coil units and a floor panel heating system installed in each room. The results are as follows. First, the GSHP system was operated for ten minutes intermittently in summer in order to decrease the heat load caused by super-insulation. Second, the energy consumption in winter where the system was operated throughout the entire day was 7.5 times higher than that in summer. Moreover, the annual COP of the heating and cooling system was 4.1 in summer and 4.2 in winter, showing little difference. Third, the outlet temperature of the ground heat exchanger in winter decreased from $13^{\circ}C$ in November to $9^{\circ}C$ in February, while that in summer increased from $14^{\circ}C$ to $17^{\circ}C$ showing that the temperature change in winter is greater than that in summer.

Keywords

References

  1. 2014 NEW and RENEWABLE ENERGY WHITE PAPER, New and Renewable Energy Center, 2014.
  2. Safa, A. A., Fung, A. S., and Kumar, R., 2015, Heating and cooling performance characterisation of ground source heat pump system by testing and TRNSYS simulation, Renewable Energy, Vol. 83, pp. 565-575. https://doi.org/10.1016/j.renene.2015.05.008
  3. Liu, S., Shukla, A., and Zhang, Y., 2014, Investigations on the integration and acceptability of GSHP in the UK dwellings, Building and Environment, Vol. 82, pp. 442-449. https://doi.org/10.1016/j.buildenv.2014.09.020
  4. Sohn, B.-H., Cho, C.-S., Shin, H.-J., and An, H.-J., 2005, Cooling and Heating Performance of a GSHP System, Korean Journal of Air-Conditioning and Refregeration Engineering, Vol. 17, No. 1, pp. 71-81.
  5. Sohn, B.-H., Choi, J.-M., and Choi, H.-S., 2011, Performance Simulation of Ground-Coupled Haet Pump (GCHP) System a Detached House, Korean Journal of Air-Conditioning and Refregeration Engineering, Vol. 23, No. 6, pp. 392-399. https://doi.org/10.6110/KJACR.2011.23.6.392
  6. Baek, N.-C., Jeong, S.-Y., Yoon, E.-S., and Lee, K.-H., 2012, The Development and Performance Analysis of Compact Type Solar Thermal/Ground Coupled Heat Pump Hybrid System for Heating, Cooling and Hot water, Journal of the Korean Solar Energy Society, Vol. 32, No. 5, pp. 59-67. https://doi.org/10.7836/kses.2012.32.5.059
  7. Kong, H.-J., Kang, S.-J., Yun, K.-S., and Lim, H.-J., 2013, An Experimental Study on the Cooing and Heating Performance of a Residential Ground Source Heat Pump System, Korean Journal of Air-Conditioning and Refrigeration Engineering, Vol. 25, No. 3, pp. 156-163. https://doi.org/10.6110/KJACR.2013.25.3.156