Computing method of lighting surface light condensation energy flux density distribution of solar tower type electric generation thermal absorber

A technology of energy flow density and calculation method, which is applied in calculation, instrumentation, electrical digital data processing, etc., and can solve problems such as large amount of calculation

Active Publication Date: 2014-01-22
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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Problems solved by technology

[0008] In short, to calculate the energy flux density distribution on the daylighting surface of the heat absorber, it is necessary to calcul

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  • Computing method of lighting surface light condensation energy flux density distribution of solar tower type electric generation thermal absorber
  • Computing method of lighting surface light condensation energy flux density distribution of solar tower type electric generation thermal absorber
  • Computing method of lighting surface light condensation energy flux density distribution of solar tower type electric generation thermal absorber

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Embodiment Construction

[0031] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0032] The embodiment of the present invention is a cavity-type heat absorber with a daylight opening size of 2m×2m, that is, the daylight surface of the heat absorber is a square plane of 2m×2m. Such as figure 1 As shown in , in order to interpolate and reconstruct the concentrated energy flow density distribution on the daylighting surface of the heat absorber, the area of ​​the daylighting surface is divided into rectangular grids 1 with N rows and M columns, where M=N=12, correspondingly there are N+1 grids Horizontal grid lines, M+1 vertical grid lines, the intersection of grid lines is grid point 2. Take a certain row of grid points in the middle, a certain column of grid points in the middle, and add the grid points on the boundary of the rectangular area to form the "Tian"-shaped grid boundary 3 of the lighting surface, and the "Tian"-...

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Abstract

Provided is a computing method of lighting surface light condensation energy flux density distribution of a solar tower type electric generation thermal absorber. According to the thermal absorber corresponding to an unilateral heliostat field, the lighting surface of the thermal absorber is divided into rectangular grids to form rectangular planar grids or cylindrical surface grids, and meanwhile borders of a grid in a shape of Chinese character 'tian' of the lighting surface are determined. The reverse light tracing method is used, a light condensation energy flux density value of the heliostat field on the borders of the 'tian'-shaped grid of the lighting surface of the thermal absorber is computed, the lighting surface grid of the thermal absorber is unfolded into an X-Y planar grid, according to the light condensation energy flux density value of the heliostat field on the borders of the 'tian'-shaped grid of the lighting surface of the thermal absorber, energy flux density values of all grid points of the lighting surface of the thermal absorber are reset in an interpolation mode. In reference to a circumferential heliostat field, for all cylindrical surface lighting surface sub areas, the energy flux density value of the borders of the 'tian'-shaped grid is computed first, and then light condensation energy flux density values of corresponding lighting surface sub areas are reset in an interpolation mode.

Description

technical field [0001] The invention belongs to the field of solar energy heat utilization, and relates to a method for calculating the density distribution of concentrated energy flow on the daylighting surface of a heat absorber of a solar tower type power station. Background technique [0002] In a solar tower thermal power station, the heat absorber is generally placed on the top of the central heat absorption tower, and there are many heliostats on the ground around the solar tower to form a concentrating field. These heliostats can rotate around two axes, automatically track the sun, and reflect the incident sunlight to the daylighting surface of the heat sink. Compared with the heat-absorbing tower, the concentrating field of the heliostat generally has two modes of north-facing single-side arrangement and circumferential arrangement. For the heliostat field arranged on one side in the north direction, one side of the heat absorber on the top of the tower is the dayl...

Claims

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Application Information

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IPC IPC(8): G06F19/00
Inventor 郭明焕王志峰
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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