Calculation method of concentrated energy flow density distribution on the daylighting surface of solar tower type power generation heat absorber

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

Active Publication Date: 2016-09-28
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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  • Abstract
  • Description
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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 calculate the concentrated energy flux density values ​​at all grid points on the daylighting surface, which requires a large amount of calculation

Method used

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  • Calculation method of concentrated energy flow density distribution on the daylighting surface of solar tower type power generation heat absorber
  • Calculation method of concentrated energy flow density distribution on the daylighting surface of solar tower type power generation heat absorber
  • Calculation method of concentrated energy flow density distribution on the daylighting surface of solar tower type power generation heat 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

A method for calculating the light-converging energy flow density distribution of the lighting surface of a solar tower power generation heat absorber. For a heat absorber corresponding to a heliostat field arranged on one side, the lighting surface of the heat absorber is divided into a rectangular grid to form a rectangular grid. Plane mesh or cylindrical mesh, and determine the "Tian"-shaped grid boundary of the lighting surface at the same time; use the reverse ray tracing method to calculate the concentration of the heliostat field on the boundary of the "Tian"-shaped mesh of the heat absorber lighting surface. Light energy flux density value; expand the grid of the heat absorber lighting surface into an X-Y plane grid, and use the calculated value of the concentrated light energy flux density on the boundary of the "field"-shaped grid to interpolate and reconstruct all the heat absorber lighting surface. Energy flux density values ​​at grid points. For the circumferentially arranged heliostat field, for each cylindrical lighting surface sub-area, the energy flux density value on the boundary of the "field"-shaped grid can be calculated first, and then the concentrated light energy on the corresponding lighting surface sub-area can be reconstructed by interpolation. Flow density distribution.

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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Patent Type & Authority Patents(China)
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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