Non-imaging disc type condenser and design method thereof

Abstract

The invention discloses a design method of a non-imaging disc type condenser. The design method includes the steps of establishing a global coordinate system, installing a cavity receiver on a focal point position of an ideal parabolic dish condenser, establishing a spatial equation of a curved surface of a reflector of the non-imaging disc condenser, establishing a radius model of the focused light spots of each ring of the reflector surface, establishing a mathematical model with the energy flow uniformity as a target and the rotating angle of each section of a parabolic bus as an optimization variable, optimizing the established mathematical model, finally determining the curved surface shape of the reflector of the non-imaging disc condenser matched with a cavity receiver to obtain uniform energy flow distribution. The reflector of the non-imaging disc condenser is composed of multi-ring reflector surfaces, the curved surface equation of each ring of reflector surfaces is different, so that the energy flow uniformity can be remarkably improved, and the peak value of the local condensation ratio can be reduced. The formation of high-temperature hot spots is effectively avoided,so that the service lifetime of a heat absorber is prolonged, and reliability of the heat absorber is improved.

Description

technical field [0001] The invention relates to the field of solar power generation, in particular to a non-imaging dish concentrator and a design method thereof. Background technique [0002] Solar energy is clean, environmentally friendly, abundantly supplied and widely distributed renewable energy. Concentrating solar thermal power generation is an important technology for the development and utilization of solar energy resources, and is considered to be an important way to solve the problems of energy shortage and environmental pollution. The dish-Stirling solar thermal power generation system uses a parabolic dish concentrator to gather sunlight to the surface of the metal coil tube in the receiver, and is used to heat the gas working medium (usually hydrogen or helium) in the metal tube, Then the heated gas working medium will drive the Stirling heat engine to work and drive the generator to work and output electric energy. Because the dish-Stirling solar thermal pow...

AI Technical Summary

Problems solved by technology

Therefore, the energy flux distribution on the surface of the cavity receiver in the dish concentrator system is usually extremely non-uniform

However, the non-uniform and high-density solar radiation may have some adverse effects on the cavity receiver device, including reducing the working efficiency of the receiver, and more seriously, it may also produce high-temperature hot spots that affect the receiver's performance. safety and working life

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