High temperature heat storage system

Abstract

The invention relates to the field of energy storage, and provides a high-temperature heat accumulation system. The system comprises a low-temperature tank, a high-temperature tank, a heat tracing device and a gas-liquid separator, wherein a first liquid inlet valve of the low-temperature tank selectively communicates with outlets of an external heat source, a cold source and a heat accumulation liquid source, and a second liquid inlet valve of the gas-liquid separator and a third liquid inlet valve of the heat tracing device selectively communicate with the outlets of the external heat sourceand the cold source separately; a liquid drainage port of the low-temperature tank communicates with a first valve, a second valve and a first heat exchange valve through a low-temperature pump separately; the first valve and the third liquid inlet valve communicate with a third valve through the heat tracing device, and the second valve, the third valve and a second liquid inlet valve communicate with liquid inlet ports of the high-temperature tank and the low-temperature tank through the gas-liquid separator separately; a liquid outlet port of the high-temperature tank communicates with thefirst valve, the second valve and a second heat exchange valve through a high-temperature pump separately; and the first heat exchange valve and the second heat exchange valve communicate with inletsof the external heat source and the cold source separately. The high-temperature heat accumulation system is capable of avoiding mixing in heat accumulation liquids with different temperature grades,so that the heat accumulation efficiency is increased.

Description

technical field [0001] The invention relates to the technical field of energy storage, in particular to a high-temperature heat storage system. Background technique [0002] The world is facing dual pressures from energy and the environment. In order to coordinate the relationship between social development and natural environment protection, it has become the consensus of people from all walks of life to vigorously develop renewable energy and increase the proportion of renewable energy in the energy structure. At present, energy storage technology is the main way to promote the development of renewable energy and solve energy supply problems. One of the most widely used and mature technologies in energy storage technology is high temperature heat storage technology. [0003] High-temperature heat storage technology has the potential for large-scale energy storage, and the heat it stores has a high grade. This heat can not only be used for energy storage alone, but also ca...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the problem of low heat storage efficiency in the prior art due to the mixing of liquid media of different temperature levels in the high temperature heat storage system during the heat storage process

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