Octahedral low-concentration photovoltaic unit body, as well as concentrating photovoltaic assembly and concentrating photovoltaic power generating device consisting of octahedral low-concentration photovoltaic unit body

Abstract

The invention discloses an octahedral low-concentration photovoltaic unit body. The octahedral low-concentration photovoltaic unit body comprises a photovoltaic battery which is square or similar to a square, as well as four front side surface light reflecting plates and four inclined side surface light reflecting plates, which are arranged around the photovoltaic battery; each front side surface light reflecting plate contains a rectangular effective light reflecting surface; each inclined side surface light reflecting plate contains a rhombic effective light reflecting surface; each rectangular effective light reflecting surface and each rhombic effective light reflecting surface reflect the incident light which is perpendicular to a plane in which the photovoltaic battery is positioned, and the surface of the photovoltaic battery is just full of the generated reflected light uniformly. The invention further discloses a concentrating photovoltaic assembly and a concentrating photovoltaic power generating device which consist of the octahedral low-concentration photovoltaic unit body. The limit concentration ratio of the octahedral low-concentration photovoltaic unit body disclosed by the invention can reach 9; the radiation received by the photovoltaic battery is uniform; compared with the conventional reflecting type low-concentration technical scheme, the radiation quantity and the electricity generating capacity of the photovoltaic battery in a unit area are greatly improved.

Description

Technical field [0001] The invention belongs to the technical field of solar photovoltaic power generation, and relates to an eight-sided low-power concentrating photovoltaic unit body, and a concentrating photovoltaic component and a photovoltaic power generation device composed of the concentrating photovoltaic unit body. Background technique [0002] With the increasing harm to the environment caused by the development and utilization of traditional fuel energy and the limited availability of energy, the development of renewable clean energy is a common issue facing the world. In the development and utilization of renewable energy, photovoltaic power generation uses photovoltaic cells to convert the light energy received on its surface into electrical energy. It has attracted attention because of its inexhaustible solar energy as an energy source, but ordinary flat panels The relatively high cost per kilowatt-hour of photovoltaic power generation devices restricts the wider pr...

AI Technical Summary

Problems solved by technology

The three implementation methods given above all use the reflection method to concentrate sunlight so that the light intensity reaching the photovoltaic cell is one to several times the intensity of sunlight. The advantage is that when the incident sunlight is parallel light, Since the reflection effect of the plane mirror is relatively uniform, the light intensity incident on the photovoltaic cell is also relatively uniform; however, the disadvantage of the reflection method is the limited light concentration ratio

It can be proved by mathematical theoretical derivation that the above-mentioned concentration power generation device reported by ZSW in Germany, when the concentration ratio achieved by the double-sided V-shaped reflector is used (that is, under the condition of vertical light irradiation, the photovoltaic cell passes through direct radiation and reflection (or refraction) The ratio of the total light intensity received by the superimposed radiation to the light intensity received by the photovoltaic cell through direct radiation) The theoretical limit (when the inclination angle between the reflector and the photovoltaic cell is greater than and close to 90°, and the length of the reflector is infinite) is 3 (actual In the application, when the inclination angle between the reflective plate and the photovoltaic cell is 120°, when the effective length of the reflective plate is equal to the length of the photovoltaic cell, the concentration ratio is 2); the concentrator disclosed in the U.S. patent with the patent No. The theoretical limit of the light ratio is 5 (in practical applications, when the inclination angle between the reflective plate and the photovoltaic cell is 120°, when the effective length of the reflective plate is equal to the length of the photovoltaic cell, the concentration ratio is 3); the patent No. ZL200510200596. For battery power generation devices, since the reflected light from two sets of oblique sides cannot evenly cover the photovoltaic cells on the bottom surface, the power generation efficiency improvement effect of using octahedral light funnel reflectors is not ideal compared with the use of four-sided reflectors, and the uneven light intensity will affect the photovoltaic cells. In addition, the octagonal entrance window has a large waste of lighting area in the array combination

Images