Cogeneration device for light condensation of single-reflection compound parabolic condenser and application method

Abstract

The invention relates to a cogeneration device for light condensation of a single-reflection compound parabolic condenser and an application method. The cogeneration device comprises a concentrating photovoltaic photothermal unit array, a tracking unit, an electricity recovery unit, a heat recovery unit and a control and monitor unit, direct sunlight parallel to the axis of the single-reflection compound parabolic condenser is reflected in one time by the single-reflection compound parabolic condenser, then sequentially passes through an ultra-white glass cover plate and an upper layer ethylene vinyl acetate (EVA) from top to bottom, and is converged to a crystalline silicon photovoltaic cell, the crystalline silicon photovoltaic cell generates electric energy and heat energy, the electric energy passes through a cable, is modulated by a photovoltaic inverter and then is incorporated into a power grid or used or stored in an off-grid way, and the heat energy is absorbed by a fluid passing through a cooling square pipe and then is introduced out for storage or application. The single-reflection compound parabolic condenser adopted by the invention is shorter than the traditional compound parabolic condenser and the traditional short and abrupt compound parabolic condenser, cost is low, high-quality electric energy can be generated, meanwhile, the heat energy can be provided, and high performance cost ratio is achieved.

Description

technical field [0001] The invention belongs to the research field of comprehensive utilization of concentrated photovoltaic light and heat, and relates to a concentrating heat and power cogeneration device utilizing a compound parabolic concentrator for concentrating light, in particular to a single reflection compound parabolic concentrator for concentrating heat and power cogeneration Device and method of use. Background technique [0002] For concentrators for comprehensive utilization of photovoltaic light and heat, trough, dish, spherical concentrating and Fresnel concentrating technologies are mainly used at present, and these concentrating technologies cannot use the scattered light of the sun; Concentrators, because their focusing planes are on the upper side of the mirror surface, the photovoltaic cell components or heat collectors installed at the focal plane will block part of the incident sunlight, thereby reducing the utilization rate of solar energy. In additi...

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Problems solved by technology

[0002] For concentrators for comprehensive utilization of photovoltaic light and heat, trough, dish, spherical concentrating and Fresnel concentrating technologies are mainly used at present, and these concentrating technologies cannot use the scattered light of the sun; Concentrators, because their focusing planes are on the upper side of the mirror surface, the photovoltaic cell components or heat collectors installed at the focal plane will block part of the incident sunlight, thereby reducing the utilization rate of solar energy. In addition, the photovoltaic cell components or collectors The heater is suspended on the upper side of the reflector surface, the cooling system is inconvenient to install, the rigidity of the overall structure of the concentrated photovoltaic photothermal system is not enough, and the wind resistance is poor

Although the traditional compound parabolic concentrator can solve the above-mentioned problems related to concentrators such as trough, butterfly, spherical concentrator and Fresnel concentrator, there are also some problems in the traditional compound parabolic concentrator itself, for example, There are multiple reflections of sunlight on the mirror body of the traditional compound parabolic concentrator; the parabolic mirror body of the traditional compound parabolic concentrator uses relatively too much material, especially with the increase of the geometric concentration ratio. A sharp increase; installation of photovoltaic cell modules or heat collectors at the light outlet where the concentrating spot is not uniform leads to problems such as a decrease in thermoelectric output performance; in addition, for the relatively excessive material used in the traditional compound parabolic concentrator reflector body , using the traditional truncation method that cuts off 1 / 3~1 / 2 of the height of the traditional compound parabolic concentrator, although the traditional truncation method reduces the material used for the parabolic mirror body of the compound parabolic It is truncated on the basis of the design of the traditional compound parabolic concentrator that requires a geometric concentration ratio, which leads to a reduction in the geometric concentration ratio required by the design, thus reducing the concentration efficiency of the truncated compound parabolic concentrator , and the traditional truncation method does not eliminate the multiple reflections on the mirror body; the compound parabolic concentrator obtained by the traditional truncation method still has uneven light output when the photovoltaic cell module or heat collector is installed on the concentrated spot The problem of lower thermoelectric output performance at the mouth

The aforementioned problems seriously restrict and reduce the cost performance of compound parabolic concentrators and corresponding concentrating heat and power cogeneration devices, which is not conducive to the development of industrialization

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