Abstract
This paper constitutes Part 2 in the series of studies that aim at development of a design and performance prediction tool for the GSHP system. First, authors described the high-speed algorithm of calculation of the ground temperature response for heat extraction of the multiple ground heat exchangers. Next, a variation of ground temperature calculated by using this method was compared with the one calculated by using superposition of the theoretical equation. As the result, the method's preciseness was proved and the calculation time was about 1/135 compared to the method described this paper with theoretical solution. From these, it was shown that the method has performance required to use as a design tool. In final, if the ground heat exchangers often become short in such a case that foundation piles of the building are used as the ground heat exchangers, it is necessary to consider heat transfer from edge of the ground heat exchangers. Thus authors reviewed the modification coefficients in order to obtain average surface temperature of the ground heat exchangers influenced by the heat transfer. The temperature calculated with the modification coefficient was compared to one calculated without the modification coefficient.
