An optimization method for radiation energy light spot analysis model parameters

A technology of analytical models and optimization methods, applied in design optimization/simulation, electrical digital data processing, special data processing applications, etc., can solve problems such as model parameter determination, low simulation accuracy, and low solution efficiency

Active Publication Date: 2019-04-30
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The shortcomings of the previous analytical model are mainly due to the low solution efficiency (numerical method solution) or low simulation accuracy due to model simplification.
Another problem is the determination of the parameters of the model, and there are few literatures that discuss and explain in detail

Method used

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  • An optimization method for radiation energy light spot analysis model parameters
  • An optimization method for radiation energy light spot analysis model parameters
  • An optimization method for radiation energy light spot analysis model parameters

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Embodiment Construction

[0096] In this embodiment, the simulation process of the radiant energy density distribution of the spot in solar thermal power generation is divided into three steps. First, consider the influence of shadow and occlusion, and extract the effective reflection area on the surface of the heliostat; then, deduce and establish the heliostat The analytical model of the scalar field function of the virtual radiant energy density distribution defined in the local coordinate system of the mirror; finally, the virtual scalar field function is obliquely and parallel projected onto the receiving plane along the direction reflected by the heliostat, thus completing the reception on the receiver Modeling of the radiant energy density distribution, the coordinate systems established in the simulation method of this embodiment are the global coordinate system O-XYZ of the heliostat field, the local coordinate system o-xy of the heliostat, and the coordinate system c-uv of the receiving surface...

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Abstract

The invention discloses an optimization method for radiation energy light spot analysis model parameters. The optimization method comprises the following steps: (1) establishing a virtual radiation energy density scalar field on a heliostat; (2) projecting the radiation energy on a receiving surface through oblique parallel projection to obtain a final radiation energy distribution result; (3) obtaining a virtual radiation energy density distribution function on a heliostat coordinate system; (4) setting a global measurement index root-mean-square error; (5) optimizing the parameter s by adopting a weighted objective function; (6) minimizing the indexes in the steps (4) and (5) within a preset requirement, and solving to obtain the value of the optimized parameter s. Compared with an existing analysis method, the method is higher in precision and can be used for quickly calculating, and the problems that an analysis model for simulating radiation energy density light spots reflected bya heliostat is low in precision simulation precision and parameters are difficult to determine in the past are solved.

Description

technical field [0001] The invention relates to the technical field of tower-type solar thermal power generation system simulation, in particular to a method for optimizing parameters of a radiant energy spot analysis model. Background technique [0002] Tower-type solar thermal power generation is an environmentally friendly and sustainable emerging technology to deal with the energy crisis in the contemporary world (Romero M, Steinfeld A. Concentrating solar thermal power and thermochemical fuels [J]. Energy&Environmental Science, 2012, 5(11): 9234 -9245.). In this type of system, the maneuvering strategy, especially when the system is unstable, requires extensive real-time radiant energy simulations. In addition to the consideration of power generation efficiency, the distribution of radiant energy density on the surface of the receiver is related to the safe operation of the system (Roldán M I, Monterreal R. Heat flux and temperature prediction on a volumetric receiver ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 赵豫红冯结青何才透
Owner ZHEJIANG UNIV
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