Loop heat pipes for solar energy water heater

Abstract

The invention relates to solar energy heat pipes, in particular to loop heat pipes for a solar energy water heater, comprising an evaporation section, a condensation section and a heat insulation section, wherein the heat insulation section is arranged between the evaporation section and the condensation section, the shells of heat pipes in the evaporation section are internally provided with a working medium, the evaporation section is a loop pipe which is formed by connecting two sections of pipes via a bent pipe, a narrower structure compared with the middle section and the back section of the evaporation section is arranged between the two sections of the pipes of the front section of the evaporation section, the two sections of the pipes of the front section of the evaporation section converge in the heat insulation section by a vaporous working medium outlet and a liquid working medium inlet at a position closing to the heat insulation section, the two sections of the pipes of the evaporation section are connected to a position corresponding to a pipe of the vaporous working medium outlet and a position corresponding to the pipe of the liquid working medium inlet, and a pipeline at the rear part of the liquid working medium inlet of the evaporation section is provided with a structure inclining downwards. The heat pipes of the invention strengthen the evaporation and condensation processes of the working medium inside the heat pipes, thereby not only increasing transmitted power of the heat pipes at a small angle of inclination and at the level, but also solving the defect of single installation of the solar energy water heater.

Description

technical field [0001] The invention relates to a solar heat pipe, in particular to a loop heat pipe for a solar water heater. Background technique [0002] At present, for heat pipe collectors in solar water heating systems, there are many limitations in the use of two-phase closed thermosiphons and conventional horizontal heat pipes on the market. The two-phase closed thermosiphon has no liquid-absorbing core inside, and the manufacturing process is simple. The work of the working fluid is only through the action of gravity to complete the entire working process and realize the heat absorption and heat release of the heat pipe. However, gravity has directionality. Therefore, the two-phase closed thermosiphon that only relies on gravity to realize the circulation of the working fluid must meet a certain inclination angle in installation, and it cannot operate in a horizontal state, which has great limitations. In the conventional horizontal heat pipes commonly used at pres...

AI Technical Summary

Problems solved by technology

Conventional horizontal heat pipes have no directionality in use and can operate in a horizontal state. However, due to the use of a liquid-absorbing core structure, the structure is complicated and the manufacturing process is cumbersome. At the same time, the structure of the liquid-absorbing core affects the diameter of its vapor chamber, causing its Reduced power makes it difficult to meet actual production needs

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