Solar energy heat collecting tube with film photovoltaic power generation coupling selective absorption coating

Abstract

The invention provides a solar energy heat collecting tube with a film photovoltaic power generation coupling selective absorption coating. The solar energy heat collecting tube comprises a metal tubeand a hood glass tube which sleeves outside of the metal tube, wherein a film photovoltaic power generation coupling selective absorption coating structure is formed in the outer wall of the metal tube, and extraction electrodes are connected to an inner side electrode coating belt and an outer side electrode coating belt; kovar metal sleeves are respectively in sealing connection with two ends of the hood glass tube, and are in tight connection with the outer wall of the metal tube through corrugated tube assemblies; a vacuum interlayer is formed between each hood glass tube and the metal tube; a bending section is formed by a conducting wire connected with each extraction electrode in the vacuum interlayer; and the tail end of each bending section is led outside the hood glass tube through direct leading or through transition materials. According to the solar energy heat collecting tube disclosed by the invention, a film photovoltaic power generation coupling selective absorption coating production line is perfectly merged to a conventional glass metal sealing solar energy heat collecting tube production line, so that the cost is reduced.

Description

technical field [0001] The invention relates to a coating structure of a solar heat collection tube, in particular to a glass-metal fusion-sealed straight-through solar heat collection tube structure utilizing thin-film photovoltaic power generation coupled with a selective absorption coating. Background technique [0002] Solar energy has the great advantages of being inexhaustible, inexhaustible, clean and environmentally friendly, and has been accepted by the society and developed rapidly. [0003] At present, there are two main ways to utilize solar energy: power generation and heat utilization. Power generation is divided into photovoltaic power generation and solar thermal power generation. Heat utilization mainly converts solar energy into heat energy to provide medium-temperature and low-temperature industrial or civil heat below 250°C. With the development of technology, there is a trend of technology coupling between photovoltaic and photothermal, that is, when s...

AI Technical Summary

Problems solved by technology

[0006] 1. They are all based on the combination of existing photovoltaic power generation sheet modules and low-temperature solar heat collector tubes. The structure and process are complicated, and it is difficult to carry out large-scale production

[0007] 2. The existing photovoltaic cells are separated from the solar selective absorption coating, or only use the excess heat of photovoltaic cells to achieve heat collection and heat exchange

[0008] The above factors lead to the complex structure, high cost, and low overall efficiency of the existing solar photovoltaic-photothermal integrated components, and it is difficult to perfectly integrate with the existing heat collector production line, resulting in the inability to scale up and develop a low-cost market

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