WO2011091681A1 - Curved surface light concentrating photovoltaic receiver - Google Patents

Abstract

A curved surface light concentrating photovoltaic receiver has a curved surface substrate (1), and a solar battery or a solar battery module(2), wherein the shape of the curved surface substrate(1) is geometrically similar with the shape of a light concentrator(3), and the solar battery or the solar battery module(2) is fixed on a light accepting surface of the curved surface substrate(1). The shape of the curved surface substrate(1) connected with the solar battery or the solar battery module(2) is geometrically similar with the shape of the light concentrator(3), thus raising light intensity uniformity of a focal spot on the surface of the receiver, improving the efficiency of the whole light concentrating photovoltaic generation system, and reducing photovoltaic generation cost.

Description

 Curved concentrating photovoltaic receiver

Technical field

 The invention relates to a curved concentrating photovoltaic receiver, belonging to the technical field of concentrating photovoltaic power generation. Background technique

 Since concentrating solar cells are generally more efficient than ordinary solar cells, one of the effective ways to reduce the cost of solar cell power generation is to use concentrating solar cells to reduce the battery area required for a given power. The lighter partially replaces the expensive solar cell. The concentrator used for the concentrating solar cell array mainly includes a Fresnel lens, a trough parabola, a rotating paraboloid, etc., and the sunlight is condensed or reflected by the concentrator to condense a point or line of focal spot, which will be gathered. The concentrating photovoltaic power generation can be realized by placing the solar cell component in the focal spot position. However, the existing concentrating solar cell modules are all flat surfaces, and the light intensity distribution of the focal spot on this plane is an uneven distribution in which the middle strong side is weak. The unevenness of light intensity on the same battery will reduce the filling factor of the battery, resulting in a decrease in battery efficiency. If the solar cell is made up of several identical sub-cells in parallel, the actual current flowing through each sub-cell is also different due to the different light intensities. Differently, this will cause the junction voltage applied to each pn junction to be significantly different, so that each subcell does not work at the same optimal operating point. This phenomenon also causes the fill factor of the entire solar cell module to decrease, resulting in a system. The decline in efficiency. Summary of the invention

 It is an object of the present invention to overcome the deficiencies of the prior art and to provide a curved concentrating photovoltaic receiver.

 The technical solution of the present invention is summarized as follows:

 A curved concentrating photovoltaic receiver comprises a curved substrate, a solar cell or a solar cell assembly. The shape of the curved substrate is geometrically similar to the shape of the concentrator, and the solar cell or the solar cell assembly is fixed on the light receiving surface of the curved substrate.

 The geometry of the curved substrate is a trough parabola or a dish paraboloid.

 The curved concentrating photovoltaic receiver of the invention has the shape of the curved substrate connected with the solar cell or the solar cell module and the geometric shape of the concentrator, so that the uniformity of the intensity of the focal spot on the surface of the receiver can be improved. In turn, the efficiency of the entire concentrating photovoltaic power generation system is improved, which helps to reduce the cost of photovoltaic power generation. DRAWINGS

 1 is a schematic view showing the installation of a curved concentrating photovoltaic receiver and a trough concentrator according to the present invention.

2 is a bottom view of a curved concentrating photovoltaic receiver with a curved substrate as a trough paraboloid. detailed description

 The invention will now be further described with reference to the accompanying drawings.

 A curved concentrating photovoltaic receiver comprises a curved substrate 1, a solar cell or a solar cell module 2, the shape of the curved substrate is similar to the shape of the concentrator 3, and the solar cell or the solar cell assembly is fixed on the light receiving surface of the curved substrate.

 The geometry of the curved substrate is a trough parabola or a dish paraboloid.

 The shape of the curved substrate is similar to the shape of the trough concentrator, and the shape is a trough parabola, or the shape of the curved substrate is similar to the shape of the dish concentrator, and the shape is a dish paraboloid.

 The material of the curved substrate can be selected from high temperature resistant metal or non-metal materials.

 The back surface of the curved substrate may also be provided with fins or pipes for fluid flow.

 The solar cell or solar cell module can be fixed to the light-receiving surface of the curved substrate by cementing, soldering or mechanical connection.

 The curved concentrating photovoltaic receiver of the present invention can also be directly immersed in an insulating liquid to cool the solar cell or solar cell module by flowing insulating liquid.

Claims

A curved concentrating photovoltaic receiver comprising a curved substrate, a solar cell or a solar cell module, characterized in that the shape of the curved substrate is geometrically similar to the shape of the concentrator, and the solar cell or solar cell module is fixed at a light receiving surface of the curved substrate.  2. A curved concentrating photovoltaic receiver according to claim 1, wherein the curved substrate has a geometric shape of a trough parabola or a disc paraboloid.