A solar thermal power generation system of a dot-line focusing coupling heat collecting field

Abstract

The invention discloses a solar thermal power generation system of a dot-line focusing coupling heat collecting field. The solar thermal power generation system includes a dot-line focusing coupling heat collecting subsystem, a heat storage subsystem, and a power-electricity generating subsystem. Wherein, the dot-line focusing coupling heat collecting subsystem includes a tower-typed heat collecting field, a linear Fresnel-typed or parabolic trough-typed heat collecting field and auxiliary equipment, and is used for focusing the solar energy so that water is heated to create steam; the heat storage subsystem includes a high-temperature heat accumulator, a low- temperature heat accumulator and auxiliary equipment, and is used for storing heat in the case of good irradiating condition and releasing heat in the case of unfavorable irradiating condition so that the system can continuously run; the power-electricity generating subsystem includes a steam turbine, a generator unit and auxiliary equipment, and is used for converting heat energy to electric energy and outputting the electric energy. The solar thermal power generation system of a dot-line focusing coupling heat collecting field increases a steam parameter. Thus, the electricity generating efficiency is evidently enhanced and the comprehensive heat collecting efficiency is enhanced so that heat loss during the heat collecting course is reduced, and reasonable gradient usage of high-quality energy is realized. Therefore, the energy usage ratio is improved.

Description

technical field [0001] The invention belongs to the technical field of solar light-heat utilization, and in particular relates to a point-line focusing coupled heat collection field solar thermal power generation system. Background technique [0002] Energy issues are related to the national economy and the people's livelihood, and are the main restrictive factors for the rapid and healthy development of my country's social economy. The rational and effective use of solar energy is expected to become one of the important means to solve this problem. [0003] At present, parabolic trough and tower focusing technologies are the two technologies with the most mature development and the highest degree of commercialization in the field of solar thermal power generation. Among them, the parabolic trough focusing technology belongs to line focusing, and the corresponding focusing ratio ranges from 20 to 100. The heat transfer fluid used is mostly heat transfer oil, and its applicat...

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Problems solved by technology

[0007] In view of this, the present invention provides a point-line focusing coupled heat collector field solar thermal power generation system to solve the shortcomings of a single type of heat collector field and improve the overall efficiency of the solar thermal power generation system

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