PURPOSE:To efficiently use an apparatus by providing cold removing means for removing cold at the time of discharging hydrogen from first metal hydride, and generating means having a turbine to be driven by the movement of hydrogen between second metal hydrides. CONSTITUTION:When a room cooling is not conducted, metal hydrides of vessels 3, 4 are not used, but only metal hydrides of vessels 1, 2 are used. In this case, movements of hydrogens between the vessels 1 and 3 and between the vessels 2 and 4 are stopped by switching valves 16a, 16b, one of the hydrides of the vessels 1, 2 is raised to high temperature and high pressure, the other is cooled, and to ambient temperature and low pressure, a gas turbine 17 is driven by the movement of the hydrogen therebetween, and a generator 18 is generated. The process is switched by switching means 7 and gas 3-way valves 14, 15 to continuously electrically generate.
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