24 June 2014
The authors developed performance prediction tool for the GSHP system
considering the influence of the ground surface. In this paper, the outlines of calculation method are firstly explained. Next, the TRT was carried out to validate the precision of the
performance prediction tool. As the result, good agreement with the measured outlet temperature of the GHEX and the calculated one was observed. Additionally, performance of
the GSHP systems using foundation pile with length of 6 m installed to the residential house is predicted. The minimum outlet temperature and maximum temperature of GHEX are less than 10 oC and more than 35 oC respectively when 15 piles are used as the GHEXs. Therefore, more than 20 piles are required for the GSHP system used for heating and cooling in the residential house. The heating SCOPs are approximately 4.0 and the cooling
SCOPs are approximately 5.0. The results indicate that the GSHP system using Foundation piles can operate with high efficiency.