Mirror field optimization design method of cornfield and tower type solar thermoelectric system

Abstract

The invention discloses a mirror field optimization design method of a cornfield and tower type solar thermoelectric system. The mirror field optimization design method includes the steps of using the product of the comprehensive optical efficiency of a mirror field and a land coverage rate of the mirror field as an optimization target, and optimizing the distance between the first row of heliostats in the mirror field and a heat absorber in the mirror field, the distance between every two rows of the heliostats and the distance between every two lines of the heliostats through a simplex algorithm so that the value of the optimization target can be the largest when the number of the heliostats and the arrangement of the heliostats are under a specific condition. According to the mirror field optimization design method, the contradiction between the number of the heliostats and the comprehensive optical efficiency of the mirror field is solved, and the mirror field optimization design method has better robustness and stability through the simplex algorithm. The comprehensive optical efficiency of each cornfield type small mirror field arranged through the mirror field optimization design method is more than 80% and is improved by 10% compared with the comprehensive optical efficiency of an existing ordinary mirror field.

Description

technical field [0001] The invention relates to the technical field of solar energy, in particular to a mirror field optimization design method of a wheat field-type tower solar thermal power system. Background technique [0002] The tower system, also known as the centralized system, mainly includes several heliostats, absorption towers and heat absorbers installed on the absorption towers. The working principle of tower solar thermal power generation technology is to gather sunlight to the heat absorber on the top of the tower through a certain number of heliostats to generate high temperature, and then heat the medium flowing through the heat absorber to convert light energy into heat energy and generate High-temperature steam drives steam turbines to generate electricity, which is a large-scale and large-scale concentrated power generation method. Each heliostat is equipped with its own tracking mechanism to accurately focus the sunlight reflection on a heat sink at the...

AI Technical Summary

Problems solved by technology

[0011] For the optimal design of the mirror field, there are the most traditional ones that take the receiving energy and investment cost as the optimization goals, but for the specific parameters such as the cost of the land area, the cost of the wire, and the cost of the receiving tower included in the investment cost, as well as the construction materials and geographical location and other related factors, it is not easy to estimate uniformly

However, there is a contradictory relationship between the number of heliostats and the comprehensive optical efficiency of the mirror field. If the land area is fixed, when the number of heliostats is large and the arrangement is dense, more shadow occlusion loss will occur, and the overall comprehensive optical efficiency of the mirror field will be higher. The efficiency will decrease accordingly; and when the number of heliostats is small and the arrangement is sparse, the comprehensive optical efficiency of the mirror field will increase relatively

Images