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http://dx.doi.org/10.6110/KJACR.2013.25.1.028

Performance Prediction of Geothermal Heat Pump(GHP) System Using Cast-in-Place Energy Piles  

Sohn, Byonghu (Green Building Research Division, Korea Institute of Construction Technology)
Jung, Kyung-Sik (S-Tech Consulting Group)
Choi, Hangseok (School of Civil, Environmental and Architectural Engineering, Korea University)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.25, no.1, 2013 , pp. 28-36 More about this Journal
Abstract
The aim of this study is to evaluate the performance of the GHP system with 45 cast-in-place energy piles(CEP) for a commercial building. In order to demonstrate the feasibility of a sustainable performance of the system, transient simulations were conducted over 1-year and 20-year periods, respectively. The 1-year simulation results showed that the maximum and minimum temperatures of brine returning from the CEPs were $23.91^{\circ}C$ and $6.66^{\circ}C$, which were in a range of design target temperatures. In addition, after 20 years' operation, these returning temperatures decreased to $21.24^{\circ}C$ and $3.68^{\circ}C$, and finally reached to stable state. Annual average extraction heat of cast-in-place energy piles was 94.3 MWh and injection heat was 65.7 MWh from the 20 years of simulation results. Finally, it is expected this GHP system can operate with average heating SPF of more than 3.45 for long-term.
Keywords
Cast-in-place energy pile; Ground heat exchanger; Geothermal heat pump system; Cooling and heating performance; Transient simulation;
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Times Cited By KSCI : 1  (Citation Analysis)
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