Phase-change energy storage and heating device as well as energy storage and heating method

Abstract

A phase-change energy storage and heating device (1) comprises an energy storage equipment box body (2) and a central heat storage assembly, wherein the central heat storage assembly comprises a heating water-outlet water distributor (3), a heat-storage water-return water distributor (4), a heating water-return water distributor (5), a heat-storage water-outlet water distributor (6) and phase-change heat storage elements (7); the heating water-outlet water distributor (3) and the heat-storage water-return water distributor (4) are arranged at the upper part of the energy storage equipment box body (2); the heating water-return water distributor (5) and the heat-storage water-outlet water distributor (6) are arranged at the lower part of the energy storage equipment box body (2); and the phase-change heat storage elements (7) are arranged at the middle of the energy storage equipment box body (2), and distributed in an array or a laminate. The phase-change energy storage and heating device has the following functions: various phase-change heat storage materials can be converted into heat storage elements, and the heat storage elements can be distributed according to the unified arrangement mode and structure in different containers for heat storage and heating. Therefore, the heating energy consumption of the city life can be lowered, and the comprehensive recovery and utilization ratio of industrial waste heat can be improved.

Description

technical field [0001] The invention relates to a heat recovery, storage, and reuse device and method thereof, in particular to a phase change energy storage device and a heat storage and release method thereof, belonging to the energy-saving and environment-friendly field. Background technique [0002] my country's industrial energy utilization rate is generally low, with an average of less than 27%. For example, 65% of the high-quality waste heat generated in the production process of various industries such as municipal waste incineration, landfill gas, iron and steel, metallurgy, chemical industry, sewage treatment, and power generation The left and right are basically recovered for power generation and industrial steam, but the intermittent, unstable, and low-quality waste heat accounting for more than 85% of the total waste heat has not been fully recovered due to the lack of mature heat storage technology and engineering equipment. The recovery and utilization of waste ...

AI Technical Summary

Problems solved by technology

[0006] 2) High waste heat grade requirements

Once the user determines the temperature of the water supply, strict requirements are placed on the fluctuation of waste heat supply. Therefore, the use of conventional waste heat recovery and utilization process technology solutions requires the fluctuation of waste heat to be small, because the waste heat recovery system does not have a heat storage device, which limits a large number of Recycling of fluctuating waste heat in line with heating requirements

[0007] 3) The waste heat capacity requirement is high. For a large number of users whose heat supply load is dynamically changing, the conventional waste heat recovery and utilization process technology scheme requires the waste heat capacity to meet the user's maximum heat load, because the waste heat recovery system has no heat storage device. The utilization rate of waste heat is reduced, and the efficiency of the whole waste heat recovery and utilization system is low.

The use of conventional technology solutions will inevitably lead to excessive heat supply capacity and high investment. However, the utilization rate of waste heat is very low, which is extremely unfavorable for the utilization of waste heat.

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