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High-concentration photovoltaic device based on crystalline silicon cell and annular Fresnel condenser

A Fresnel condenser and crystalline silicon cell technology, applied in the field of solar photovoltaic utilization, can solve the problems of triple junction cells, high cost, limiting the maximum power of crystalline silicon cells, etc. Effect

Inactive Publication Date: 2021-06-01
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Abstract
  • Description
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Problems solved by technology

Existing high-power concentrating solar cells have the disadvantage of extremely high cost, such as triple-junction cells, etc.
Crystalline silicon cells have low cost and high utilization efficiency, but the working efficiency of crystalline silicon cells will decrease with the increase of temperature; in addition, the current generated by traditional crystalline silicon cells under high solar irradiation There will be a certain upper limit, which limits the maximum power of crystalline silicon cells

Method used

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  • High-concentration photovoltaic device based on crystalline silicon cell and annular Fresnel condenser
  • High-concentration photovoltaic device based on crystalline silicon cell and annular Fresnel condenser
  • High-concentration photovoltaic device based on crystalline silicon cell and annular Fresnel condenser

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Embodiment Construction

[0013] The present invention is further described below as shown in the figure and the specific embodiment:

[0014] Such as figure 1 Shown are the ray diagrams of two adjacent lenses, which describe Q, H, , , the specific definition of D, the formulas (1), (2), and (3) are all provided by the attached figure 1 derived. Formula 1 describes the basic principle that the light irradiated to the center of (2) satisfies, that is, the light irradiated to the center of (2) will be reflected to the center of the receiver, corresponding to the radius and height and , Values ​​are related. Formulas 2 and 3 describe the relationship between the height and radius between adjacent lenses. The derivation principle is: the light reflected from the upper edge of the Nth reflector is just not blocked by the N+1th lens, and the Nth lens The lower edge of is on the same X coordinate as the upper edge of the N+1th lens.

[0015] Such as figure 2 Shown is a three-dimensional schematic...

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Abstract

The invention discloses a high-concentration photovoltaic device based on a crystalline silicon cell and an annular Fresnel condenser, and belongs to the field of solar photovoltaic application. According to the method, a high-power Fresnel condenser and a high-power condensation crystalline silicon battery suitable for the light spot shape of the condenser are included. The high-power annular Fresnel condenser is a high-power point type condenser, the cost of the high-power annular Fresnel condenser is lower than that of a traditional disc type condenser, the shape and size of a Fresnel lens condenser are not limited, the condensation multiple of the high-power annular Fresnel condenser is higher than that of a common line type condenser, and the high-power annular Fresnel condenser has high application prospects in the high-power condensation photovoltaic field. Compared with a traditional crystalline silicon cell, the high-power condensation crystalline silicon cell has the advantages that the area of a single crystalline silicon cell is optimized, and meanwhile, the combination mode of crystalline silicon cell pieces in a crystalline silicon cell assembly is optimized.

Description

technical field [0001] The invention belongs to the field of solar photovoltaic utilization, and in particular relates to a high-power concentrating crystal silicon battery and a corresponding high-power annular Fresnel concentrator. Background technique [0002] Solar photovoltaic technology is one of the main forms of solar energy utilization. Under the current situation of increasingly tense energy utilization trends, the research and development of photovoltaic technology has a great effect on the sustainable utilization of energy. High-power concentrating photovoltaics have a high conversion rate and efficiency. In addition to high conversion rates, high-power concentrating photovoltaics also have small temperature coefficients, good grid matching (high daily power generation), and environmental friendliness (small land occupation, land can be comprehensively utilized), and the efficiency can be improved. Existing high-power concentrating solar cells have the disadvant...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/042H02S40/22H02S40/42G02B19/00
CPCH01L31/042H02S40/22H02S40/425G02B19/0042Y02E10/52
Inventor 梁凯张衡陈海平刘扬张泳
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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