International Journal of Environmental Science and Development

Abstract—The potential of chemical heat storage (CHS) for saving energy and reducing CO₂ emissions through more effective utilization of combined heat and power systems (CHP) was evaluated using a mathematical model based on linear programming. The mathematical model constructed in this study can be used to minimize the total cost in industrial factories by optimizing the capacity and operational performance of the energy supply equipment. CHP utilization, total primary energy consumption, and total CO₂ emissions were calculated from the optimized results. Optimization and calculation were conducted for selected food factory and automobile factory in Japan. It was assumed that their energy system consisted of a power grid, boiler, gas engines or gas turbines as CHP, along with CHS using MgO/H₂O materials. In the case of the food factory, the potential of CHS for saving energy and reducing CO₂ emissions could not be confirmed because the energy supply could be optimized without CHS, using only the power grid, CHP, and boiler. On the other hand, for the automobile factory, CHS improved CHP utilization by 2.1%, and reduced total primary energy consumption and total CO₂ emissions by 1.4% and 1.5%, respectively.

Index Terms—Combined heat and power, chemical heat storage, linear programming.

Yoshikazu Shirai is with Tokyo Gas Co., Ltd., 1-7-7, Suehiro-Cho, Tsurumi-Ku, Yokohama, Kanagawa, Japan (e-mail: y.shirai@tokyo-gas.co.jp).

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Cite: Yoshikazu Shirai and Noriko Osaka, "Computational Study on Energy Savings and CO2 Reduction from Combined Heat and Power with Chemical Heat Storage," International Journal of Environmental Science and Development vol. 7, no. 10, pp. 772-777, 2016.