Phase-change heat transfer type intermediate temperature heat reservoir as well as manufacturing and application thereof

Abstract

The invention discloses a phase-change heat transfer type intermediate temperature heat reservoir and an intermediate temperature solar air-conditioning system formed by the phase-change heat transfer type intermediate temperature heat reservoir. The phase-change heat transfer type intermediate temperature heat reservoir is a closed pressure container and comprises a box body, a plurality of ring frames, screens, heat accumulation layers and heat exchanging tubes, wherein the plurality of ring frames are respectively and horizontally fixed on the inner wall at the lower part of the box body, a plurality of screens are respectively arranged on each ring frame, the heat accumulation layers are respectively paved on each sieve screen, each heat accumulation layer is formed by mixing a composite phase-change heat accumulation material and grains of sand, the heat exchanging tubes are arranged in an inner cavity in the upper part of the box body, a tube cavity of each heat exchanging tube is isolated from the inside of the box body and is communicated with the outside of the box body, wherein a heat conducting device flows in the tube cavity, the intermediate temperature heat accumulation device takes water and water vapor as phase-change heat transfer working mediums, and the phase-change heat transfer mediums are directly evaporated or condensed on the surface of the granular composite phase-change heat accumulation material to realize phase-change heat exchange. The phase-change heat transfer type intermediate temperature heat reservoir and the intermediate temperature solar air-conditioning system have the advantages of excellent heat exchange capability, high solar utilization ratio, simple structure, easy manufacture and long service life.

Description

technical field [0001] The invention relates to a solar energy utilization device, in particular to a phase-change heat type medium-temperature heat storage device and its manufacture and application, belonging to the field of energy technology. Background technique [0002] Solar energy is a clean, environmentally friendly, efficient and inexhaustible new energy. The market for solar heat utilization products is huge, so all countries regard the utilization of solar energy resources as an important part of sustainable development strategies. At present, among solar thermal utilization, the technology of solar water heater is relatively mature, but there are still some unsatisfactory places. For example, most of these water heaters can only provide low-temperature hot water below 80 degrees for daily life, but cannot provide high-temperature air or steam that the water temperature required by industry reaches more than one hundred degrees. [0003] Solar air-conditioning sy...

AI Technical Summary

Problems solved by technology

These two patents basically represent the current mainstream technology of solar air-conditioning systems, which are characterized by: the heat collector has a low heat collection temperature, directly provides hot water to the refrigerator, and has no heat storage or only a symbolic low-temperature heat storage device

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