Split single-tank solid stacked bed heat storage system

Abstract

Provided is a split type single-tank solid accumulation bed heat storage system. A split type solid accumulation bed heat storage tank of the system is formed by stacking a top conical heat storage tank body (1), multiple split type cylindrical heat storage tank bodies and a bottom conical heat storage tank body (16) in parallel in the height direction. The two conical heat storage tank bodies (1 and 16) are connected with the split type cylindrical heat storage tank bodies through flanges (12). A fluid inlet pipeline (2) and a fluid outlet pipeline (17) are mounted on the upper portion of the top conical heat storage tank body (1) and the lower portion of the bottom conical heat storage tank body (16) respectively. A current equalizer (7) is mounted at the bottom of the top conical heat storage tank body (1), and the bottom of each split type cylindrical heat storage tank body is provided with a porous supporting grate (11). Solid heat storage materials are supported by the supporting grates (11) so as to be accumulated in the split type cylindrical heat storage tank bodies to form a porous bed body, and a heat transfer fluid channel is formed. The heat storage materials in the split type cylindrical heat storage tank bodies are different, and the accumulation modes are different.

Description

technical field [0001] The invention relates to a heat storage system, in particular to a solid stacked bed solar heat storage system. Background technique [0002] In the field of solar thermal utilization, especially in the field of solar thermal power generation, due to the intermittent and scattered characteristics of solar radiation, the operation of the system is strongly unstable, which leads to unstable power generation output and even damage to equipment. Heat storage technology can effectively solve the problem of time and space mismatch between heat energy supply and demand, so heat storage system is a key subsystem in solar thermal utilization system. For solar thermal power generation systems, the heat storage system can convert solar radiation into heat and store it when the solar energy is sufficient, and then use the stored heat energy to generate electricity when the solar energy is insufficient or there is no solar radiation. The "peak shifting and valley ...

AI Technical Summary

Problems solved by technology

However, the system is an integrated single-tank heat storage tank, which still fails to solve the problem of thermal ratchet effect when the system is running at high temperature; and multiple parallel baffles are arranged in the tank, although it increases the flow rate of the heat exchange fluid. , but at the same time it also increases the resistance of the fluid flow in the tank, increasing the irreversible loss of available energy; at the same time, due to the fixation of the serpentine flow channel, the fluid distribution in the tank is not uniform, which may cause the heat exchange fluid in the tank and Results of uneven radial temperature distribution of solid heat storage materials

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