By Shin'ya Obara
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Extra resources for Compound Energy Systems: Optimal Operation Methods
When Eneed,t is less than Esep, it generates electricity by supplying reformed gas and air to the fuel cell. 5). After compressing these gases, they are stored in each cylinder. When Eneed,t exceeds Esep, it generates electricity by supplying the hydrogen and oxygen in the cylinders to the fuel cell through the network. 5 37 Fuel cell operation. leveling, it is necessary to determine Esep, where hydrogen and oxygen are produced at a time of low load, and the amount is consumed at a time of high load balance.
2) expresses heat consumption, the 1st term is the heat demand of each building connected to the network, and the 2nd term expresses the heat release of the hot-water piping that connects each building. 4) is the balance equation of hydrogen. 4) expresses the quantity of hydrogen production of the water electrolyzer, and the 2nd term expresses the hydrogen quantity supplied to the network from the cylinder, and the 3rd term expresses the quantity of hydrogen production of the reformer. Moreover, the right-hand side expresses the hydrogen consumption of the fuel cell of M.
The optimal path of the hot-water piping network in FEN is considered to be inﬂuenced by the generation capacity of the fuel cells of each building, the quantity generated by solar modules, and energy-demand patterns. 14 should be obtained. Therefore, it is thought that the heat-release volume of the hot-water piping previous and subsequent to such a building with a large fuel cell capacity will exceed that of the hot-water piping connecting other buildings. The path planning calculation of hot-water piping of parts with relatively low heat-release volumes requires higher analytical accuracy compared with hot-water piping parts with considerable heat release.