Method for predicting and maintaining condensation performance of solar disc type condensation system

Abstract

The invention discloses a method for predicting and maintaining condensation performance of a solar disc type condensation system, and the method comprises the following steps: 1), building a finite element model of the disc type condensation system, and calculating the optical information of a disc type condenser under a non-bearing condition without an optical error; 2) calculating optical parameters of each plane infinitesimal grid of a condenser reflecting mirror surface when self-weight and wind pressure load boundary conditions are applied; 3) predicting the focusing energy flow distribution and the optical performance of the disc type condensation system under the action of the load by adopting a ray tracing method; 4) fitting to obtain a function model of the tracking error angle value and the centroid position of the focusing light spot; 5) determining the centroid position of the focusing light spot according to the operation condition, and reversely solving the output cornererror value of the double-axis tracking device; and rotating an output shaft of the double-shaft tracking device by a corresponding angle, so that the condensation performance of the disc type condensation system is kept. The method is easy to implement, the light condensation performance of the disc type light condensation system under the bearing working condition can be predicted, energy flowdistribution is kept, and the design of the disc type system is guided.

Description

technical field [0001] The invention belongs to the technical field of solar energy concentration utilization, and in particular relates to a method for predicting and maintaining the light concentration performance of a solar dish type concentration system. 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. Dish-Stirling solar thermal power generation system uses a parabolic dish concentrator to gather sunlight to the surface of the metal coil in the receiver, and is used to heat the gas working fluid (usually hydrogen or helium) in the metal coil , and then the heated gas working medium will drive the Stirling heat engine to drive the generato...

AI Technical Summary

Problems solved by technology

However, during the service period of the project, the dish concentrating system will be subjected to structural deformation due to its own weight and wind load, which will deteriorate its focusing performance and radiation energy flow distribution, and cause the solar radiation energy received by the surface of the Stirling heat engine heat sink to be insufficient. Balanced, reducing light-heat-work-electricity conversion efficiency, and more seriously, it will cause high-temperature hot spots on the heat absorber coil, resulting in safety problems such as ablation or burn-through

In particular, the more stringent requirements of commercial power stations are that the concentrating dish system should operate normally within a certain wind speed (usually 8-level wind), which brings more severe challenges to the safe and efficient operation of the concentrating dish system.

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