A method for predict that condensing performance of a dish-type triangular element splice parabolic film condenser

A technology of performance prediction and triangular elements, which is applied in the direction of instruments, special data processing applications, complex mathematical operations, etc., can solve the problems of unclear physical meaning and inability to truly reflect the specific situation of triangular elements combined with paraboloids, etc.

Active Publication Date: 2019-03-12
XIDIAN UNIV
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  • Application Information

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Problems solved by technology

The method in the above-mentioned literature is based on the standard parabolic equation and applied to the trough concentrator, which is different from the application object of the method of the present invention; Ma Hongcai uses the probability function to approximate the simula...

Method used

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  • A method for predict that condensing performance of a dish-type triangular element splice parabolic film condenser
  • A method for predict that condensing performance of a dish-type triangular element splice parabolic film condenser
  • A method for predict that condensing performance of a dish-type triangular element splice parabolic film condenser

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Embodiment 1

[0099] Ignoring the daily tracking error, the quasi-geodetic grid model accepts the prediction of surface energy flow density, assuming that the solar radiation energy flow density is 200w / m 2 , the position of the receiving surface is located at Z=F, Z=F+0.075, Z=F-0.075, predicting the energy flow density of different receiving surfaces, Figure 7 is a specific forecast map.

[0100] refer to figure 1 , the basic parameters of the concentrator are the aperture D=5m, the focal length F=2m, the number of sub-rings P=8, and the number of first torus slices TN=6

[0101] Step 1. Establish the reflective film surface of the quasi-geodesic grid concentrator

[0102] combine Figure 2a and Figure 2b , to establish the topological relationship between the quasi-geodesic mesh film surface and the triangular elements. The surface area of ​​the condenser aperture is:

[0103]

[0104] In the formula, A is the area of ​​the condenser aperture, and D is the diameter of the ref...

Embodiment 2

[0166] Ignoring the daily tracking error, the three-way grid merges the parabolic model, assuming that the solar radiation energy flow density is 200w / m 2 , the position of the accepting surface is at Z=F, Figure 8 is the specific prediction result graph.

[0167] The basic parameters of the concentrator are aperture D = 5m, focal length F = 2m, number of sub-rings P = 8, number of first torus slices TN = 6

[0168] Step 1. Establish the reflective film surface of the concentrator,

[0169] combine Figure 3a and Figure 3b , to establish the topological relationship between the three-way mesh film surface and the triangle elements. The three-way mesh divides the radius into P parts on the projection surface, but the triangles in the projection surface are equilateral triangles.

[0170] All the other steps are identical with embodiment 1

[0171] For specific applications, there are apparent solar tracking errors, quasi-geodetic grid models, and prediction of surface en...

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Abstract

A method for predict that condensing performance of a triangular element splice parabolic film condenser is characterized in that the method at least comprises the follow steps: step 1, establishing areflective film surface of the condenser; 2, calculate that normal vector of each triangular element by using the topological relation of the triangular element and the vertex coordinates; 3, simulate a solar cone model by considering incident solar ray, and generating incident points of rays on a small flat surface of a triangular element at random by use a Monte Carlo method; 4, calculate thatray equation reflected by the triangular element by use the Fresnel principle; 5, calculate that coordinate of the intersection point of the reflected light ray and the receive surface, wherein the coordinate value of the intersection point is the coordinate of the light ray reflected by the triangular element and the receiving surface; 6, collect that intersection point and the energy of the light reflected by the receive surface and calculating the distribution of the energy flow density. The invention can simulate the distribution of the received surface energy flow density under the conditions of different incident angles of the light rays.

Description

technical field [0001] The invention belongs to the field of solar thermal power generation, in particular to a method for predicting the concentrating performance of a dish-type triangular-element spliced ​​parabolic thin-film concentrator. Background technique [0002] Solar thermal power generation is to convert sunlight into heat energy after focusing, and then use internal combustion engines or steam turbines for energy exchange, and finally convert solar energy into electrical energy. Due to the low energy density of the sun irradiated to the ground, theoretically, the maximum temperature of the object can only be raised to close to 100 degrees Celsius, which cannot meet the requirements of thermal power generation. Therefore, it is necessary to gather solar energy. [0003] In the field of solar thermal power generation, according to the concentration method of concentrators, it can be divided into tower type, dish type, trough type and linear Fresnel type. At presen...

Claims

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Application Information

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IPC IPC(8): G06F17/50G06F17/11
CPCG06F17/11G06F2111/08G06F30/17G06F2111/10G06F30/20Y02E10/40
Inventor 季祥郑飞王海红李鹏郑涛芮喜任星张峰斌
Owner XIDIAN UNIV
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