HEAT ACCUMULATION APPARATUS

PURPOSE:To provide a heat accumulation apparatus capable of performing stable heat accumulation and accumulating heat under a high efficiency by providing a nozzle which mixes a gaseous guest agent with a liquid guest agent and injects the mixture into a heat accumulation tank. CONSTITUTION:In case of performing heat accumulating operation, a compressor 2 is started to operate to take out freon gas from a gaseous region 12 of a heat accumulation tank 1; the gas is compressed by a compressor 2 and condensed within a condensor 5 to form a freon liquid. The liquid enters a fluid nozzle 9, thermally expands and then enters the heat accumulation tank 1. The liquid reacts with water, acting as a host agent, within the heat accumulation tank 1 to generate a gas clathrate compound and latent heat of a guest agent for generating the gas clathrate compound, i.e. freon is accumulated in the heat accumulation tank 1. Gaseous freon taken out from an upper gaseous phase of a condensor 5 is guided into a gaseous guest agent inlet of a double-fluid nozzle 9 through a flow rate adjusting valve 4. Application of a double-fluid nozzle enables a simultaneous supplying and mixing of the gaseous guest agent and the liquid guest agent, resulting in that it becomes possible to get a large value of guest agent flow speed at a nozzle outlet. A generation of ice near the nozzle is prohibited and a mixed state of fluid within the heat accumulation tank is drastically improved.