Heat collecting module of metal-glass sheathing heat collecting pipe

Abstract

The invention discloses a heat collecting module of a metal-glass sheathing heat collecting pipe, belonging to the field of the solar thermal energy utilization technology. The current all-glass vacuum heat collecting pipe is not pressure-bearing, is easy to be explosive and is not anti-freezing, thereby being difficult to be applied to a heat collecting project; a selective heat absorption coating layer (a magnetron sputtering vacuum coating film) of the heat collecting pipe inner pipe outer surface of a vacuum heat pipe is easy to fall off under long-term basking. A vacuum glass pipe in the invention is the heat collecting module of the metal-glass suit heat collecting pipe, which does not contact working medium and is pressure-bearing and antiseptic and has high heat absorption efficiency and low heat emissivity. The heat collecting pipe comprises a glass vacuum heat preservation pipe and a metal heat collecting pipe, the heat collecting pipe is arranged in the glass vacuum heat preservation pipe, the outer surface of the heat collecting pipe is plated with copper chemically and a black nickel layer is electroplated after copper plating is carried out. Meanwhile, a flow channel blind plate is additionally arranged in a water filling circulating flow channel to separate cold and hot water working medium, and the water filling circulating flow channel is directly connected with a water filling pipe to guide cold water to directly reach the bottom part of the metal heating collecting pipe; and a new pressure-bearing connection type of connecting a collecting pipe and the heat collecting pipe is provided.

Description

technical field [0001] The invention relates to a metal-glass set heat collecting tube heat collecting module, which belongs to the technical field of solar thermal energy utilization. Background technique [0002] The solar collector is an extremely critical component of solar thermal conversion. Its structure and operation mode determine the conversion efficiency of solar energy, the environment for installation and application, the safety of system operation, the life of the system and the total cost of the system. [0003] At present, all-glass vacuum collector tubes are the most used. Due to the simple manufacturing process, low energy consumption, low emissions, and unprecedented industrialization of glass vacuum collector tubes, the manufacturing cost of glass vacuum tubes is extremely low! And the glass vacuum heat collector tube is anti-corrosion and not easy to scale. So it is easy to popularize. But the fatal disadvantage is that it is not pressurized, easy to e...

AI Technical Summary

Problems solved by technology

If metal and glass are directly vacuum-sealed (there are very few metals that can be directly sealed with glass, Kovar metal is commonly used at present, but it is not anti-corrosion), the process is quite complicated, and the yield is extremely low and the cost is high. Uneven heat and cold, more likely to burst, air leakage failure

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