PURPOSE: To prevent variation in a heat transfer capacity by thermally separating at least one of a heat absorption side heat exchanger and a heat radiation side heat exchanger from both hydrogen occlusion heat exchanger pair during a heat transfer capacity decreasing period due to switching of a hydrogen flowing direction between the pair of the hydrogen occlusion exchangers.
CONSTITUTION: If temperature of a hydrogen occlusion heat exchanger 2 is higher than that of a hydrogen occlusion heat exchanger 1, two-way valves 61, 63, 66, 68 are opened, and two-way valves 62, 64, 65, 67 are closed. Accordingly, a brine circulation pump 7 circulates low temperature brine through the exchanger 1, a heat absorption side heat exchanger 4, a heat accumulator 9a, and a brine circulation pump 8 circulates high temperature brine through the exchanger 2, a heat radiation side heat exchanger 5, and a heat accumulator 9b. If the temperature of the exchanger 2 is lower than that of the exchanger 1, the valves 61, 63, 66, 68 are closed, and the valves 62, 64, 65, 67 are opened. Accordingly, the pump 7 circulates the low temperature brine through the exchanger 2, the exchanger 4, and the accumulator 9a, and the pump 8 circulates the high temperature brine through the exchanger 1, the exchanger 5 and the accumulator 9b.
ISOTANI BUNICHI
MIURA MASAYOSHI
MAEDA HIRONORI
