20 September 2011
In order to investigate design and operating method of the ground source heat pump (GSHP) system combined cooling tower, the authors developed a computer aided simulation program for the system. Performance of the GSHP system combined cooling tower, which has been installed in a new office building in Kitakyushu City, is predicted with the simulation program. The result shows the combined GSHP system can operate with high cooling SPF of 5.4. In addition, the authors investigated connection sequence and operation
method of the combined GSHP system. The result shows that the GSHP system provides the highest cooling SPF when cooling tower is connected in series with ground heat exchangers (GHEXs) and the water as heat carrier fluid is circulated to the cooling tower ahead of the GHEXs. The system performance is additionally improved by set the water
temperature in which the cooling tower is operated.