Anti-frozen-heaving heat pipe

A technology for preventing frost heave and heat pipes, which is applied to heating devices, heat exchange equipment, solar thermal devices, etc., can solve problems such as failure to work normally, heat pipe failure, and damage to solar water heating devices, and achieve the effect of solving the defects of frost heave cracked pipes.

Inactive Publication Date: 2009-11-04
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When frost heaving occurs, the heat pipe, the core heat transfer component of the heat pipe solar water heating device, may crack the

Method used

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  • Anti-frozen-heaving heat pipe
  • Anti-frozen-heaving heat pipe
  • Anti-frozen-heaving heat pipe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] In the tube wall 1 (inner wall) of the evaporation section of the heat pipe, there is a liquid 2, namely water, at the bottom; the porous medium structure 3 is arranged in the evaporation section of the heat pipe, close to the tube wall 1, and one end, that is, the lower end, goes deep into the liquid 2, and the upper end is higher than or Much higher than the liquid level of liquid 2, that is, the liquid level of liquid 2 when the heat pipe stands vertically at normal temperature.

[0028] One of the porous medium structures 3 is a wire mesh 3 (also known as a liquid-absorbing core structure), the wire mesh 3 is in close contact with the tube wall 1 of the evaporation section, and the wire mesh 3 is made of copper wire; similar structures formed by sintering .

[0029] The second part of the porous medium structure 3 is a channel 6, and a plurality of channels 6 are engraved on the tube wall 1 of the heat pipe evaporating section. In the liquid 2 at the lower end of th...

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Abstract

The invention relates to an anti-frozen-heaving heat pipe. A structure of the heat pipe comprises: a porous medium structure is arranged on the wall surface in an evaporation section of the heat pipe, wherein the porous medium structure is in a porous arrangement; each aperture is between 0.05 and 1.0 mm; and the upper end of the porous medium structure is higher than the liquid level. The invention solves the problems that when the frozen heaving happens, a core heat transfer component of a heat pipe solar water heater, namely the heat pipe may have the phenomenon of pipe cracking to cause that the heat pipe has no effect and the whole solar water heater is damaged and cannot work normally. The heat pipe is analyzed from the angles of crystallization kinetics and material mechanics, and the porous medium structure is arranged on partial positions of the evaporation section of the heat pipe; and the effect of the anti-frozen heaving of the heat pipe is realized in a mode of changing the crystallization of a liquid-phase working medium and in a mode of reducing the phase-transition swell capacity.

Description

technical field [0001] The invention relates to a heat pipe or a thermosiphon that can withstand multiple freeze-thaw cycles without rupture, in particular to an anti-freeze expansion heat pipe. Background technique [0002] The technology of domestic solar water heating devices has been greatly developed, from all-glass vacuum tube solar water heaters to solar heat pipe water heating devices. The defect of the all-glass vacuum tube solar water heater is that the reliability of the system is relatively low. For example, if a glass tube of the collector is broken, the whole water heater will not work normally. The heat pipe hot water system basically solves the above problems and realizes continuous operation with high reliability. Even if a certain heat collecting pipe fails, it will not affect the operation of the whole water heater. [0003] Before the present invention, when there is no sunshine continuously in winter, especially when using solar water heating devices in...

Claims

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Application Information

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IPC IPC(8): F28D15/02F28F21/08F24J2/46
CPCY02E10/40
Inventor 陶汉中
Owner NANJING UNIV OF TECH
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