Composite paraboloidal photovoltaic hot-water heat collector

Abstract

The invention relates to a composite paraboloidal photovoltaic hot-water heat collector which comprises a curved reflecting mirror and a photovoltaic absorbing body, wherein the cross section of the curved reflecting mirror is in a W shape, the curved surfaces at both sides are paraboloids, the curved surfaces at both sides of the inner bending position of the bottom are circle involute curved surfaces, and the connecting position of the paraboloids and the circle involute curved surfaces carry out smooth transition; a U-shaped pipe of the photovoltaic absorbing body is positioned between twolayers of cell boards, and a heat insulating material is filled between the U-shaped pipe and the two layers of cell boards; three-circuit photovoltaic cells are respectively and uniformly distributed on the outer sides of the of the two layers of cell boards, and the two layers of photovoltaic cells are connected in parallel; and the photovoltaic absorbing body is horizontally positioned in the connecting position of the circle involute curved surfaces at both sides of the middle of the curved reflecting mirror. The invention can simultaneously generate power and hot water, improve the efficiency of the photovoltaic cells, the utilization ratio of solar energy in low power focus and the utilization ratio of the solar energy in low power spotlight, has no tracing, is convenient for use and fully utilizes the reflection of light rays.

Description

technical field [0001] The invention relates to the field of solar energy utilization, in particular to a photovoltaic hot water heat collector under compound deep groove parabolic low-magnification focusing. Background technique [0002] On the one hand, the compound parabolic concentrator CPC (Welford and Winston, 1978) is a non-imaging concentrator with low concentration ratio designed according to the principle of edge rays, which can convert the incident light within the range of acceptance angle to the ideal concentration ratio Collect on absorbent body. Winston (Winston) pointed out the potential of CPC as a solar collector. Compound parabolic concentrators (CPCs) with low concentration ratios (less than 3) have great practicability. They do not need to track the sun's trajectory to accept and concentrate incident light in a wide range of angles. Rabl gave the analysis method of the optical and thermal properties of the compound parabolic concentrator (CPC), and in ...

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Problems solved by technology

[0004] In order to solve the problem that the Maria Brogren structure cannot ensure that the photovoltaic cells on the absorber work at the same similar temperature, resulting in a decrease in the entire photovoltaic efficiency, the present invention provides a new structure compound parabolic photovoltaic hot water collector

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