Approximate constant pressure type pressurized hot water heat storage system and operation method thereof

Abstract

The invention discloses an approximate constant pressure type pressurized hot water heat storage system, and relates to the technical field of heat storage systems of compressed air energy storage power stations. The system comprises an under-pressure hot water heat storage system, and the under-pressure hot water heat storage system comprises a high-temperature water tank and a low-temperature water tank; the high-temperature water tank and the low-temperature water tank are filled with pressure-stabilizing gas and are connected through a communicating pipe; the pressure stabilizing system B comprises a buffer tank, a high-pressure gas storage tank and a pressure stabilizing gas pressurization system; the buffer tank is connected with the communicating pipe, and the high-pressure gas storage tank is connected with the communicating pipe. Compared with a high-pressure and high-temperature hot water heat storage system in the prior art, the air side pressure fluctuation range of the high-temperature water tank and the low-temperature water tank can be effectively reduced, stress fatigue of the high-temperature water tank and the low-temperature water tank is effectively relieved, the service life of the high-temperature water tank and the low-temperature water tank is prolonged, safety is improved, design difficulty and adopted measures are reduced, and the manufacturing cost of the storage tank is reduced. The invention further relates to an operation method of the approximate constant pressure type pressurized hot water heat storage system.

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