Across-waveform channel solar air thermal collector combining solid-solid phase transition heat-storage material

Abstract

The invention relates to the technical field of solar energy utilization, in particular to an across-waveform channel solar air thermal collector combining solid-solid phase transition heat-storage material, comprising a transparent cover plate, a frame, a heat-insulation layer, a sine-wave-shaped hear absorption plate, a sine-wave-shaped burble bottom plate, solid-solid phase transition heat storage material, an air filter, an air inlet and an air outlet, wherein the sine-wave-shaped hear absorption plate and the sine-wave-shaped burble bottom plate of the thermal collector form an across-waveform channel. After entering the thermal collector through the air filter, the air is burbled by the sine-wave-shaped burble bottom plate so as to ensure that air sufficiently exchanges heat with the sine-wave-shaped hear absorption plate in the across-waveform channel and the heat exchange area of the sine-wave-shaped hear absorption plate is increased. Prepared polylol solid-solid phase transition heat-storage material is added to a metal sheet and encapsulated in an upwards convex wave-shaped groove in the lower surface of the sine-wave-shaped hear absorption plate, therefore, when phase change occurs, the polylol solid-solid phase transition heat-storage material can adversely absorb and release a great deal of heat and has small volume change, light degree of supercooling without toxicum, erosion or liquid phase. The invention can ensure that the temperature of the air outlet can be kept in a more stable range when the air thermal collector works, reduce the heat loss, improve the efficiency and prolong the working time of the air thermal collector.

Description

Technical field: [0001] The invention relates to the technical field of solar heat utilization, in particular to a solar air heat collector with cross wave channels combined with a solid-solid phase change heat storage material. Background technique: [0002] Flat-plate air collectors can be divided into permeable and non-permeable types according to the form of the heat-absorbing plate and the internal air flow. The characteristic of the non-permeable collector is that the air flows above or below the heat-absorbing plate It cannot penetrate the heat-absorbing plate itself, and its advantages are simple structure, small resistance, and low cost, and its disadvantage is low efficiency. In order to enhance the heat transfer of air, measures such as fins can usually be added to the heat absorbing plate, but it will also increase the flow resistance; the heat absorbing plate of the permeable collector is characterized in that air can pass through the heat absorbing plate, and t...

AI Technical Summary

Problems solved by technology

However, solid-liquid phase change heat storage materials are severely undercooled and prone to liquid phase stratification, resulting in deterioration of heat storage performance.

In addition, due to the existence of the liquid phase, there is often a certain degree of corrosion and toxicity, and corrosion-resistant materials such as metals, plastics, etc. are required to make sealed containers, so that the price of the container is often higher than that of the heat storage material.

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