Medium and high temperature heat collecting tube for internal concentrated light and volume reduction solar energy and its manufacturing method

Abstract

The invention relates to an internal-condensation capacity-reducing solar medium and high temperature heat collection pipe and a method for manufacturing the same. The heat collection pipe comprises a vacuum internal-condensation solar heat collector, wherein the vacuum internal-condensation solar heat collector consists of an outer cover tube which is made of a light-transmitting material, a heat absorption tube which is coaxial with the outer cover tube and a composite parabolic reflecting plate which is assembled between the outer cover tube and the heat absorption tube; a heat energy conductor is arranged in the vacuum internal-condensation solar heat collector; the heat energy conductor consists of a metal sleeve, a metal flow guide cavity tube which is assembled in the metal sleeve, and heat conduction media which are filled in the metal sleeve and the metal flow guide cavity tube; the metal sleeve is inserted into an internal cavity of the heat absorption tube and tightly contacted with the heat absorption tube; and a heat conduction heat medium transmission path is formed between the metal flow guide cavity tube and the metal sleeve. The preparation steps of the high temperature heat collection pipe are as following: manufacturing focus solar collector in vacuum, processing heat sensor, and then assembling and moulding. The internal-condensation capacity-reducing solar medium and high temperature heat collection pipe is high in heat collection efficiency, high in heat transfer speed and safe, and can convert solar energy into a medium and high temperature heat source for use.

Description

Technical field [0001] The invention relates to a medium and high temperature heat collecting tube for internal concentrating light and reducing capacity of solar energy and a manufacturing method. Background technique [0002] At present, there are two main types of heat collection tubes used for solar energy. One is an all-glass vacuum heat collection tube. One end of the tube is a blind end, and the other end is an open end that communicates with the header. This type of heat collection tube uses water as the heat transfer medium. . The other type is a glass double vacuum heat pipe, both ends of which are blind ends, which use a heat conduction medium as the heat conduction medium of the solar heat collection tube. The two types of collector tubes have been widely used in solar water heaters, and solar water heaters are popular among the general public as a kind of daily necessities that provide cheap heat sources. In order to further improve the heat collection temperature ...

AI Technical Summary

Problems solved by technology

Although this kind of technical scheme can effectively increase the thermal efficiency of absorbing solar energy through the reflector, this patent still has the following technical defects: 1, because the focal axis of the reflector, the heat-absorbing tube and the outer cover tube of the program are not the central axis Overlap structure

Therefore, it not only increases the difficulty of processing and assembling the heat collecting tube

In particular, the reflector adopts a double-paraboloid or paraboloid non-tracking structure, which causes a part of the focal axis of the reflector to separate from the surface of the heat-absorbing tube within a certain period of time, which reduces the heat-absorbing efficiency.

2. The heat-absorbing pipe of this scheme is made of borosilicate glass. When the heat-absorbing pipe made of this material reaches a high temperature, it is easy to burst and leak heat medium, causing the system to fail.

In addition, the two ends of the heat-absorbing tube adopt an open sealing structure, and when the sealing interface is heated, it is very easy to cause the heat-absorbing tube to expand and explode.

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