2011 Volume 33 Issue 1 Pages 29-40
Authors developed a new Ground Coupled Heat Pump (GCHP) system in Fukuoka city, southwestern Japan. The system was installed in the brick-made experiment house and it had experienced two years operation. The system was designed through the use of the geophysical prospecting method and the numerical heat transfer simulation. Its performance had been observed during the operation, and its high efficiency was confirmed. The system achieved a system COP (coefficient of performance) at a value of 5.0 throughout the cooling operation in 2007. The assessment on subsurface thermal environment caused by the newly developed system was also conducted. The result showed that the system affects the subsurface temperature field quite slightly during twenty years operation
