Calculating method for mirror field optical efficiency on basis of graphics processing unit (GPU) tower type solar energy thermoelectric system

A tower solar and thermoelectric system technology is applied in the field of calculation based on the optical efficiency of the mirror field of the GPU tower solar thermoelectric system.

Active Publication Date: 2012-06-27
ZHEJIANG UNIV
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Problems solved by technology

The traditional method "grids" the mirror surface of the heliostat, and sequentially judges whether the central light of each grid block is blocked. This sequential calculation time is long and the efficiency is low, e

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  • Calculating method for mirror field optical efficiency on basis of graphics processing unit (GPU) tower type solar energy thermoelectric system
  • Calculating method for mirror field optical efficiency on basis of graphics processing unit (GPU) tower type solar energy thermoelectric system
  • Calculating method for mirror field optical efficiency on basis of graphics processing unit (GPU) tower type solar energy thermoelectric system

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Embodiment Construction

[0028] Such as figure 1 As shown, a GPU-based calculation method for the optical efficiency of the mirror field of the tower solar thermoelectric system, including:

[0029] (1) Determine the mirror field parameters and the position of the sun to obtain the center coordinates of each heliostat, and the unit vector of incident and reflected light;

[0030] Mirror field parameters include mirror specifications, spacing, mirror height, absorber height, and absorber inlet parameters. In addition to mirror field parameters, it is also necessary to determine the height and azimuth of the sun, or determine a simulation time, which can be obtained based on latitude and longitude these two angles. The unit vector of the light reflected by each heliostat can be obtained by combining the two; the unit vector of the incident light of the sun can be determined through the sun's altitude angle and azimuth angle. Because it is parallel light, this vector is applicable to each heliostat. Si...

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Abstract

The invention discloses a calculating method for mirror field optical efficiency on the basis of a graphics processing unit (GPU) tower type solar energy thermoelectric system, which comprises requesting mirror plane central coordinate matrix of a mirror field, determining the position of the sun, requesting mirror field cosine and atmosphere transmission efficiency; determining heliostats possibly having blocking and shading (B and S) effects with each mirror, translating the top points of a row of mirrors to the plane where the calculated mirror is arranged, and recording the coordinate after transformation; projecting the coordinate at the top point of an inlet of an absorber to the plane of each heliostat and recording the coordinate data; and utilizing the Monte-Carlo method and Helen theory to calculate B and S and intercept (B and S and Int) efficiency of the heliostats according to the recorded coordinate data, utilizing a compute unified device architecture (CUDA) calculatingplatform and a GPU double-layer parallel structure to accelerate calculation, compositing various efficiency to obtain the total optical efficiency of the mirror field. The method can improve simulation calculating speed of the mirror field optical efficiency of the tower type solar energy power station while ensuring accuracy so as to save optimization cost.

Description

technical field [0001] The invention relates to the field of tower solar power generation, in particular to a method for calculating the mirror field optical efficiency of a GPU tower solar thermoelectric system. Background technique [0002] The tower solar power generation system uses thousands of mirrors to gather sunlight to the absorber on the high tower to generate heat and then generate electricity. It is the most economical large-scale solar power generation method. In the cost of the entire power generation system, the heliostat field has the largest proportion. Different mirror field arrangements will directly affect the optical efficiency (light-gathering ability) and power generation of the system. Therefore, the optimal mirror field arrangement scheme is obtained through simulation. It is beneficial to reduce costs and increase production capacity, and how to quickly obtain the optical efficiency of a certain arrangement is the premise of optimization. [0003]...

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Application Information

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IPC IPC(8): F24J2/07G06F19/00F24S20/20
CPCY02E10/41Y02E10/40
Inventor 赵豫红谢飞赵敏迮银曦
Owner ZHEJIANG UNIV
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