Paper Conference

Proceedings of ASim Conference 2014: 2nd Asia conference of IBPSA-China, Japan, Korea


Effect of Energy Saving and Peak Power Reduction by Combination of Several Thermal Storage Methods ―The formulation of the secondary side simulation model and the review of the method to operate the soil heat- storage system―

Kasumi Nakaguma, Daisuke Sumiyoshi, Yasunori Akashi, Harunori Yoshida, Takao Katsura, Yuichiro Amano, Mitsuhiro Onosaka, Toshihiro Yasuoka

Abstract: This study aims to formulate an efficient way to operate complex heat- storage systems based on the review of the combination and the operation of multiple heat- storage systems while taking advantage of each feature. In this report, a whole air-conditioning system was replicated with the secondary side model in addition to the simulation model that had been developed. With this method, it became possible to more precisely replicate the secondary side behaviors at the time of heat release from the soil heat storage. A discussion was implemented on the operation methods of the soil heat storage system using the developed model. As a result, it was revealed that it is necessary to increase the heat release in order to make the soil heat-storage more energy efficient. It was clarified that for this purpose, it is necessary to make the time length of the heat release from the soil heat storage longer and preset the flow rate with the differences in the temperature and flow rate between the inlet and outlet taken into consideration.
Keywords: Soil thermal storage, method to operate, Commissioning, Simulation, air-conditioning system
Pages: 817 - 824