A kind of heat storage-heat exchange equipment

Abstract

The invention provides heat storage-heat exchange equipment. The equipment comprises a plurality of stacked heat storage-heat exchange units which are arranged in an array mode. Each heat storage-heat exchange unit comprises a heat storage shell, a heat storage material arranged in a cavity in the heat storage shell and a heat exchange device arranged in the heat storage material. The heat storage-heat exchange equipment is characterized in that the upper portions of the cavities in the heat storage shells are opened, the horizontal cross section areas of the cavities, storing the heat storage materials, in the heat storage shells are gradually increased in the height direction, and the heat storage shells have the heat sensing and heat storage capability. The heat storage-heat exchange units perform heat input and output through the heat exchange devices, and the heat storage-heat exchange equipment has the advantages that the cost is low, the temperature parameter utilization range is wide, the structure is simple, modular workshop production can be achieved, transportation is convenient, and field installation is simple and easy. The equipment can be applied to multiple fields.

Description

technical field [0001] The invention relates to a heat storage-heat exchange device, in particular to a heat storage-heat exchange device applied in the field of solar energy. Background technique [0002] With the development of society, the depletion of fossil energy is inevitable, which means that before the energy is exhausted, human beings must find new alternative energy—renewable energy. Among all renewable and clean energy sources, solar energy is the future alternative energy source that experts from all over the world are optimistic about. [0003] An obvious feature of solar radiation is that it is affected by regular changes such as day and night and seasons, as well as random factors such as cloudy, cloudy and rainy. In order to overcome the discontinuity of solar radiation, heat storage systems are used in solar energy utilization systems. Currently used heat storage materials are divided into three categories: sensible heat type, latent heat type and chemica...

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Problems solved by technology

As a heat storage material, high-temperature resistant concrete has a good application prospect, is safe and stable, and has low cost. However, it has low thermal conductivity, a large number of heat exchange pipes, a continuous drop in temperature, and the inability to obtain higher parameters. Heat exchange pipes Due to the difference in expansion coefficient between solid materials, material damage or cracks will appear after repeated heating and cooling, which will have a negative impact on the heat transfer effect and service life; inorganic salts have large latent heat of phase change and are widely used, but their impact on The container is corrosive to a certain extent, and the requirements for the material of the container are relatively high, so it is difficult to reduce the cost; The heat storage shell is formed into a cylinder or a rectangular cylinder, and the inorganic salt is in the cylindrical shell), the existing phase change heat storage has problems in engineering realization, the volume change brought about by the solid-liquid phase change process and the shell The material is not easy to match, and it will be damaged after many cycles. Specifically, when the heat storage tank system receives heat input, the internal heat exchange pipe first heats the inorganic salt inside the heat storage tank, while the external high temperature resistant concrete does not When the heat is received in time or only a small amount of heat is received, the temperature matching is inconsistent, causing the inorganic salt to expand outward, and the expansion of the heat storage shell is insufficient, resulting in cracks in the heat storage tank after multiple frequent cycles; The overall storage leads to too high thermal conductivity between different temperature regions, forming a uniform temperature effect, and it is difficult to guarantee the output temperature parameters; the large volume brings huge shell size, high pressure bearing requirements, and high shell cost; the cost of energy storage materials is also high. higher

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