Distributed thermal energy storage system

Abstract

The invention relates to a distributed heat collection and energy storage system with molten salt as the medium, including four subsystems: a heat collection subsystem, a molten salt pipe network, an energy storage subsystem and a heat exchange subsystem. The heat collection subsystem includes a collection The heat module and the heat collection module are connected to the energy storage subsystem through the molten salt pipe network. The molten salt pipe network adopts double pipes of high-temperature molten salt pipes and low-temperature tank and cold molten salt storage tank, the heat exchange subsystem includes a heat exchanger, wherein the hot molten salt in the hot molten salt storage tank exchanges heat with water through the heat exchanger to generate hot steam, and the molten salt after heat exchange The salt becomes cold molten salt, which flows into the cold molten salt storage tank. The invention has strong design innovation, reasonable and clear system design, and effectively solves the problem of molten salt transportation and energy storage in the field of distributed photothermal power generation through unique technology and flow, especially the large-scale molten salt pipe network has freezing blockage The problem of risk ensures the stable and efficient operation of the system.

Description

technical field [0001] The invention relates to a distributed heat collection and energy storage system using molten salt as a medium, belonging to the technical field of photothermal power generation. Background technique [0002] At present, solar power plants with heat storage capacity in the field of photothermal power generation mostly use molten salt as the heat absorbing and heat storage working medium. Due to the low flux density of solar energy, solar thermal power plants need to occupy a large amount of land resources. The modular mirror field design can greatly improve the light efficiency of the mirror field, thereby improving the land utilization rate. In the design of a modular photothermal power station, it usually includes 3-20 identical mirror fields and heat collection modules, each heat collection module is equipped with a molten salt heat absorber, and the cold molten salt pumped from the energy storage system After being heated up by the heat absorber t...

AI Technical Summary

Problems solved by technology

For a large molten salt pipeline network, if a large amount of electric heat tracing is used to heat the pipeline, it will inevitably lead to a huge power consumption of the plant, resulting in a reduction in the economy of the power plant

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