Novel solar thermal collector

Abstract

The invention provides a novel solar thermal collector which comprises a heat-transfer area, heat-transfer mediums, a heat exchange area and heat exchange mediums. The novel solar thermal collector is characterized in that the heat-transfer area is positioned in the position of solar ray convergence and surrounds the heat exchange area, the flowing heat-transfer mediums are arranged in the heat-transfer area, the flowing heat exchange mediums are arranged in the heat exchange area, the boiling point of the heat-transfer mediums in the heat-transfer area is higher than the output temperature of the heat exchange mediums, sunlight energy transmits heat to the heat exchange mediums flowing through the heat exchange area through the heat-transfer area and the heat-transfer mediums in the heat-transfer area, after the absorption of the heat, the heat exchange mediums flow out of the solar thermal collector, and heat exchange is completed. The novel solar thermal collector is capable of being applied to a direct shift gearbox (DSG) system in the field of solar optothermal, safe and reliable in running and low in cost, and has a good application range.

Description

technical field [0001] The invention relates to a solar heat collector in the field of solar heat utilization. Background technique [0002] With the vigorous development of renewable energy such as solar energy in the world, concentrated solar power (CSP) is gradually recognized by people. In the CSP system, the heat absorption and heat transfer part plays a very important role. The heat exchange medium of solar heat collection technology currently mainly uses heat transfer oil as the heat transfer medium, and after heat exchange through the heat transfer oil, it drives a conventional steam turbine to drive a generator set to generate electricity. Since the current working temperature of heat transfer oil must be controlled within 400°C, exceeding this temperature will lead to problems such as heat transfer oil cracking, increased viscosity, and reduced heat transfer efficiency, which limits the working temperature of solar thermal power generation. At the same time, the c...

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Problems solved by technology

Due to the unstable state of water when boiling in the heating tube, there are problems such as two-phase flow transmission and uneven vaporization pressure in the heat collecting tube, such as water hammer, vibration, and fatigue damage of pipeline materials; in addition, when saturated steam becomes superheated In the steam section, due to the poor thermal conductivity and weak heat absorption capacity of the steam, the pipeline is prone to overheating damage; and when the pipeline is heated unevenly, the temperature difference of the pipe wall is large, and severe bending will occur, causing other losses (such as vacuum sealing Destruction); Moreover, the existing technology still does not solve a series of problems caused by the DSG pipeline without local heating (such as local shadows caused by cloud occlusion in the mirror field), such as water input and steam output flow control, and parameter changes. influences

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