PV-T collector

Abstract

The invention discloses a PV-T collector. The PV-T collector comprises an aluminum alloy frame, a toughened glass, an EVA, photovoltaic cells, an ultrathin EVA, an absorber, heat preservation layers and a back plate, wherein the toughened glass, the EVA, the photovoltaic cells, the ultrathin EVA, the absorber, the heat preservation layers and the back plate which are arranged from top to bottom are fixed in the aluminum alloy frame, the toughened glass, the EVA, the photovoltaic cells, the ultrathin EVA and the absorber are heated and laminated into a whole, the upper surface of the absorber is coated with a selective absorption coating, heat circulation devices are further arranged between the absorber and the back plate, each heat circulation device is tightly attached to the back surface of the absorber, and the heat preservation layers are arranged around the heat circulation devices in a filling mode. According to the PV-T collector, the toughened glass, the EVA, the photovoltaiccells, the ultrathin EVA and the absorber are subjected to hot pressing into a whole, an air layer is not reserved, meanwhile, the heat transfer speed of the photovoltaic cells to the absorber can beeffectively improved by adopting the ultrathin EVA, the heat transfer speed is higher than that of a traditional EVA, the heat resistance is reduced, the working temperature of the cells is effectively reduced, the power generation efficiency is improved, meanwhile, a heat exchange device is arranged, and the heat exchange device can convert the residual light energy into heat energy of the heat exchange medium.

Description

technical field [0001] The invention relates to the technical field of solar heat collectors, in particular to a PV-T heat collector integrating power generation and hot water production. Background technique [0002] In recent years, with the increasingly prominent environmental problems and energy problems, new energy technologies have attracted more and more attention in the world today. Solar photovoltaic technology has emerged as a new type of pollution-free power generation technology, but efficiency issues have always been the bottleneck restricting the development of photovoltaic technology. , where temperature is one of the main factors restricting the efficiency of photovoltaic panels. PVT collectors combine traditional solar collectors with photovoltaic cells to generate hot water while cooling photovoltaic cells to improve electrical efficiency. Moreover, this heat collecting device is safe, energy-saving and pollution-free, and is favored by people. [0003] I...

AI Technical Summary

Problems solved by technology

However, there are many problems in this design: for example, due to the low heat transfer efficiency, even if there is a heat collector for heat absorption, the temperature of the photovoltaic heat absorbing plate is too high, and the efficiency decreases

[0009] Most of the current PV-T collectors use a 2-3cm air interlayer between the glass cover plate and the photovoltaic panel. On the one hand, the overall thickness of the collector will be increased, and the air interlayer is not conducive to heat transfer. If the efficiency is too low, it will affect the working efficiency of photovoltaic panels. At the same time, conventional photovoltaic panels generally leave gaps, and sunlight will pass through the gaps, and this part of the heat cannot be well utilized; in addition, conventional PV-T heat collectors The heat transfer efficiency of the device is also relatively low, which needs to be improved

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