Phase-change heat storage and heat exchange integrated water tank

Abstract

The invention relates to the technical field of phase change energy storage and air energy heat storage and heat preservation, and discloses a phase-change heat storage and heat exchange integrated water tank which comprises a box body for water storage. A phase change layer is arranged at the outer side of the box body, and the phase change layer is divided into two parts by a first partition plate, wherein a material located above the first partition plate is a high-melting-point phase change material, and a material located below the first partition plate is a low-melting-point phase change material; and a heat preservation layer is arranged at the outer side of the phase change layer, an air layer is arranged between the heat preservation layer and the phase change layer, a plurality of parallel flow equalizing pore plates are arranged in the air layer, the inner sides of the flow equalizing pore plates are connected with the phase change layer, the outer sides of the flow equalizing pore plates are connected with the heat preservation layer, and a plurality of flow guide holes are evenly formed in the flow equalizing pore plates. According to the phase-change heat storage and heat exchange integrated water tank, the two-melting-point phase change materials are applied to the heat storage water tank, the thermal stratification effect of the water tank is improved, the phase change uniformity is enhanced, the energy storage density of the water tank is improved, and the water supply capacity of the water tank is guaranteed; and the heat preservation performance of the water tank is enhanced, the invalid heat loss is reduced, and the solar photo-thermal utilization efficiency is improved.

Description

technical field [0001] The invention relates to the field of phase change energy storage technology and air energy heat storage and heat preservation technology, in particular to an integrated water tank for phase change heat storage and heat exchange. Background technique [0002] Improving the utilization rate of renewable energy is one of the important ways to achieve the goal of carbon neutrality. In the field of renewable energy utilization, solar thermal technology is relatively mature and has been widely used. However, solar radiation is restricted by factors such as weather, day and night, and seasons, and has the characteristics of discontinuity and instability, which limits the effective utilization of solar heat and light. As a heat storage component in solar thermal utilization, the hot water storage tank has the functions of adjusting load fluctuations and storing hot water, and can effectively improve the influence of meteorological parameters on solar thermal...

AI Technical Summary

Problems solved by technology

Existing phase change heat storage tanks usually use a single melting point phase change material. Due to the temperature stratification in the vertical direction in the water tank, when the phase change material in the upper part of the water tank undergoes a phase change, the phase change material in the middle and lower part of the water tank often cannot reach the melting point.

Single melting point phase change heat storage tanks have the disadvantages of uneven and insufficient melting of phase change materials, which reduces the utilization rate of phase change materials

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