A dish type solar concentrator and its design method

Abstract

The invention provides a dish type solar energy concentrator. The bottom of a dish surface is provided with a circular opening, the dish surface is a rotation curved surface, and the bus of the rotation curved surface is a curve based on a specific first-order nonlinear differential equation. Disclosed is also a design method of the dish type solar energy concentrator. According to a light uniform reflection principle and related optical geometry knowledge, the specific first-order nonlinear differential equation bus equation of the rotation curved surface of the dish surface is derived through calculating. According to the dish type solar energy concentrator and the design method thereof, the dish type solar energy concentrator is provided with the dish bottom opening, and the rotation curved surface bus of the dish surface is a specific first-order nonlinear differential equation curve, so that the dish type solar energy concentrator can form quite uniform hot-fluid distribution on a receiver, and the energy conversion efficiency and other integration performance of the concentrator are substantially improved. Therefore, the dish type solar energy concentrator and the design method thereof are especially suitable for an optically focused photovoltaic solar device of a large-dimension receiver.

Description

technical field [0001] The invention relates to a dish-type solar concentrator and a design method thereof, belonging to the technical field of solar concentrators. Background technique [0002] As a clean, non-polluting and inexhaustible renewable energy, solar energy has increasingly become a research hotspot in the field of energy. Especially in recent years, the rapid development of concentrated photovoltaic solar energy technology has not only gradually reduced the total system cost by reducing the raw materials of photovoltaic cells, but also effectively improved the energy conversion efficiency and production capacity, so it has been more and more widely used. The concentrating photovoltaic solar energy device adopts a dish concentrator, and the reflector of the dish concentrator is a rotating paraboloid, which has good light concentrating performance and heat collection performance. [0003] However, the existing dish-type solar concentrators also have inherent defe...

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Problems solved by technology

[0006] The purpose of the present invention is to solve the problems existing in existing dish solar concentrators, such as receiver shading, rotating paraboloid geometry, etc., which cause uneven distribution of receiver heat flow, affect light concentration performance, and reduce energy conversion efficiency. Insufficient, provide a dish type solar concentrator with an opening at the bottom of the dish surface, the generatrix of the rotating curved surface of the dish surface is a special curve and its design method, the dish type solar concentrator can form a relatively uniform heat flow distribution on the receiver , improve the energy conversion efficiency and other comprehensive performance of the concentrator, especially suitable for concentrating photovoltaic solar energy devices with large receivers

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