Phase-change heat storage solar photovoltaic photo-thermal flat-plate heat collector

Abstract

The invention discloses a phase-change heat storage solar photovoltaic photo-thermal flat-plate heat collector. The heat collector comprises a heat collector shell, a heat preservation layer arrangedin the heat collector shell, a PCM phase change heat storage plate array arranged on the top surface of the heat preservation layer, a heat collector plate core flow channel pipe arranged on the top surface of the PCM phase change heat storage plate array, a packaging photovoltaic cell piece arranged on the top surface of the heat collector plate core flow channel pipe, and a transparent cover plate arranged on the top surface of the packaging photovoltaic cell piece, wherein the transparent cover plate is arranged at the opening of the top of the heat collector shell, and seals the heat collector plate core flow channel pipe, the heat preservation layer, the PCM phase change heat storage plate array and the packaging photovoltaic cell piece in a cavity of the heat collector shell; the PCMphase change heat storage plate array comprises a first phase change heat storage plate array and a second phase change heat storage plate array; the first phase change heat storage plate array is used for absorbing heat of the heat absorption plate in the daytime, and the effect of improving the battery efficiency is achieved; and the second phase change heat storage plate array emits heat at night, so that the function of preventing the heat collector from being frozen is achieved.

Description

technical field [0001] The invention relates to a solar heat collector, and more specifically relates to a phase change heat storage solar photovoltaic photothermal flat plate heat collector. Background technique [0002] Solar photovoltaic / thermal comprehensive utilization technology (photovoltaic / thermal, PV / T) combines photovoltaic cells with solar heat collection technology. Utilize the technology that generates both electricity and heat at the same time. Photovoltaic photothermal comprehensive utilization technology realizes the integration of photovoltaic modules and solar collectors, saves material, production and installation costs, effectively controls the operating temperature of photovoltaic cells, improves power generation efficiency, and prolongs the service life of photovoltaic cells , and can provide heating and clean domestic hot water. This technology can also easily realize building integration. It has been widely used, especially in areas with relatively ...

AI Technical Summary

Problems solved by technology

However, there are many problems in this design: for example, due to the low heat exchange efficiency, even if there is a heat collector to absorb heat, the temperature of the photovoltaic heat absorbing plate is too high, and the efficiency drops; After a day of operation, it often freezes at night, causing serious damage to heat collectors and photovoltaic heat absorbing panels, greatly reducing their service life

However, most of the research and patents are limited to the use of more complex auxiliary support systems to achieve anti-freezing, and there are few studies on how to improve the anti-freezing ability of the collector itself; in the field of solar thermal energy, phase change heat storage has been used The material increases the temperature of the collector at night and achieves the purpose of antifreezing solar collectors. The existing phase change heat storage collector includes the collector shell, the collector plate core flow channel tube, the insulation layer, and the phase change heat storage plate array. , phase change plate array frame, heat absorbing plate and transparent cover plate, but this phase change heat storage collector only uses a single phase change material with a low phase change temperature, which can only guarantee the antifreeze effect at night in winter, and cannot Absorbs heat and lowers system temperature

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