Measurement method of energy flux density distribution of heliostat filed of tower type power station

A technology of energy flux density and measurement method, which is applied in the field of concentrating energy flux density distribution measurement of the heliostat field of a tower power station, can solve the problem that it cannot meet the measurement needs of the power station and cannot obtain the concentrating energy of the heliostat field to the sun. Flow density distribution, etc.

Active Publication Date: 2018-06-29
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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Problems solved by technology

[0014] None of the existing three types of measurement methods for the distribution of concentrated energy flow density in the heliostat field of tower-type powe

Method used

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  • Measurement method of energy flux density distribution of heliostat filed of tower type power station
  • Measurement method of energy flux density distribution of heliostat filed of tower type power station
  • Measurement method of energy flux density distribution of heliostat filed of tower type power station

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Embodiment Construction

[0041] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0042] Embodiments of the present invention are as follows:

[0043] install as figure 2 The moonlight photometering station shown is used to measure the normal direct illuminance of moonlight, wherein a dual-axis moon tracker 5 tracks the moon, and a reference illuminance meter 4 fixed on the dual-axis moon tracker measures the normal direct illuminance of moonlight , Install or share the existing heliometry station of the tower power station on the ground, mainly composed of a dual-axis solar tracker and a pyranometer. The measurement steps are as follows:

[0044] 1. Calculate the position angle of the sun at different times during the day: altitude angle and azimuth angle, and the position angle of the moon at different times at night: altitude angle and azimuth angle, and record the corresponding moments when the position angles of the ...

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Abstract

The invention discloses a measurement method of energy flux density distribution of heliostat filed of a tower type power station. The method comprises the following steps: (1), computing the positionangles of the sun at day time and the moon at night at different times, and recording times corresponding to the sun and the moon when the position angles of the sun and the moon are the same; (2), selecting day time, full moon night and unclouded full moon night when the position angles of the sun and the moon are the same, arranging an illuminometer array on a heat absorber of a tower type heliostat filed sun tower, and measuring the energy flux density of a concentrating light spot; obtaining the relative energy flux density of a moonlight concentrating light spot, namely a concentrating ratio function by comparing a moonlight normal direct illuminance measured through a moonlight measuring station; measuring a sun normal direct illuminance at a particular time through a sun measuringstation at day time with the same position angle with the unclouded full moon night, multiplying the sun normal direct illuminance with the concentrating ratio function, so as to obtain the energy flux density distribution of the discrete tower type heliostat filed to a sun concentrating light spot, and obtaining the f energy flux density distribution of the continuous sunlight concentrating lightspot through data interpolation.

Description

technical field [0001] The invention relates to a method for measuring the distribution of concentrated energy flow density in a heliostat field of a tower-type power station. Background technique [0002] Solar tower power generation is a system in which multiple heliostats that track the sun reflect solar radiation to a heat absorber placed on the tower to obtain a high-temperature heat transfer medium, and the high-temperature heat transfer fluid directly or indirectly generates power through a thermal cycle. The solar tower power station mainly includes heliostats, solar towers, heat absorbers, heat storage and generator sets, etc. Solar tower concentrating has the following characteristics: ①Many heliostats in the concentrating field concentrate on the heat absorber on the top of the tower at the same time, forming high-intensity non-uniform concentrating energy on the plane of the daylight opening and the heat absorbing surface of the heat absorber Flux density; ②Affe...

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Application Information

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IPC IPC(8): G01J1/00G01M11/02
CPCG01J1/00G01M11/02
Inventor 王楠郭明焕张喜良王志峰
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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