Tower Solar High and Low Temperature Complementary Power Generation System

Abstract

The invention discloses a tower type solar energy high and low temperature complementary power generation system, which belongs to the application field of solar energy and includes a high temperature power generation system and a low temperature compensation system. The high temperature power generation system includes a high tower, a solar receiver arranged on the top of the high tower, and a steam turbine generator , condenser and heliostat, the heliostat reflects sunlight to the solar receiver, and the solar receiver converts the received sunlight into high temperature heat energy; the low temperature compensation system includes solar low temperature collector, heat pump, steam generation The solar collector and the steam booster pump; the solar low-temperature collector or the solar low-temperature collector and the heat pump work together to provide heat energy for the steam generator to produce low-temperature steam, and the low-temperature steam is sent to the solar receiver through the steam booster pump, and the solar receiver will The low-temperature steam is heated to become superheated steam, and the superheated steam enters the turbo-generator to generate power, and the condenser is connected to the turbo-generator. It not only greatly improves the efficiency of solar energy utilization, but also greatly reduces investment and operating costs, and saves land.

Description

technical field [0001] The invention relates to the field of solar energy applications, in particular to a solar high temperature thermal power generation system. Background technique [0002] The tower-type solar high-temperature thermal power generation system in the prior art uses several heliostats to reflect and focus sunlight to the receiver on the top of the iron tower hundreds of meters high to obtain a high temperature of thousands of degrees to heat the molten salt for energy storage, and then passes through The heat exchanger turns the water into superheated steam and enters the turbogenerator to generate electricity, or the receiver on the top of the iron tower directly heats the water into superheated steam and enters the turbogenerator to generate power. The single unit capacity of the tower power station can reach one million kilowatts, which is considered by the industry to be the most promising alternative energy source. In the prior art, the tower-type sol...

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Problems solved by technology

In the prior art, the tower-type solar high-temperature thermal power generation system has the following disadvantages: 1. The cost of the heliostats used to automatically track the sun on several sides is high; 2. Since the scattered light is not focused, only the direct light of the sun can be used. Therefore, the utilization efficiency of solar energy is low; 3. In order to reduce the mutual shading between the heliostats when the sun's altitude angle is low, the distance between the mirrors is large, and the power station above one million kilowatts needs to occupy a lot of land, and , should be basically on the same plane, occupying a large area and high land cost; therefore, the tower type solar high temperature thermal power generation system has not been commercialized due to large investment, high cost and low efficiency, and it is necessary to make it commercialized , there is still a need for greater improvement

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