System model analysis on effective utilization of waste heat from data center

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  • データセンター排熱の有効利用システムのモデル分析

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<p>The temperature of waste heat from a data center is about 40°C. The waste heat is not reused and thrown away. It is important to use it for other facility. The objective of this study is to build an optimum operation model to balance supply and demand of energy. The system consists of a heat pump, a hot water tank and tap water. Waste heat from the data center is recovered by the heat pump. The compressor of the heat pump is operated in response to heat demand. In this study, mass flow from the condenser to the hot water tank, and mass flow of tap water are assumed constant. The optimum operation is calculated with minimum use of electric power as the objective function. As the result, with given demand data electric power consumption is minimum when the mass flow from the condenser to the hot water tank is 0.3 [kg/s] and the mass flow of tap water is 0 [kg/s]. The model needs to involve a boiler in the system to be operated flexible.</p>

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