A simulation of an underground heat storage system using midnight electricpower

The purpose of this study is to investigate how much the peak daytime deman d for electricity is reduced by an underground heat storage system that use s surplus electricity during the nighttime. In this paper, we report on a n umerical simulation method and the results from an energy performance simul ation of this system at Park Dome Kumamoto, a Kumamoto Prefectural indoor a thletic facility. The simulation results were in good agreement with the me asurements, and that shows that this simulation method is applicable for th e prediction and optimization of an underground heat storage system for oth er conditions. (C) 2001 Elsevier Science Ltd. All rights reserved.