HEAT ACCUMULATOR

摘要

Provided is a heat accumulator in which a heat accumulation quantity can be increased without necessity for increasing the size thereof. The heat accumulator (4) for accumulating the heat of a heat medium oil heated to a predetermined temperature beyond 100ºC comprises a heat accumulation tank (41) for storing the heat medium oil and a heat accumulating material (40) which is provided in the heat accumulation tank (41) and has a heat capacity (C?V) per unit volume higher than that of the heat medium oil.