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Efficient double-glass vacuum heat-pipe solar heat-gathering pipe

A technology of solar collector tubes and vacuum heat pipes, applied in solar collectors, solar thermal energy, solar thermal power generation, etc., can solve the problems of low solar energy utilization efficiency and long heat transfer distance, so as to improve heat utilization efficiency and reduce heat loss Effect

Inactive Publication Date: 2007-03-28
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, since the outer wall of the inner tube of the double glass vacuum tube is coated with a coating with high absorption of solar radiation, the heat transfer path is: sunlight heats the glass tube → heat energy is transferred to the air layer in the tube → heat energy is transferred to the fins → Heat pipe, long heat transfer distance, low efficiency of solar energy utilization

Method used

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  • Efficient double-glass vacuum heat-pipe solar heat-gathering pipe

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Effect test

Embodiment 1

[0009] A high-efficiency double-glass vacuum heat pipe solar heat collection tube, including a double-glass vacuum tube 1, the right end of the double-glass vacuum tube 1 is equipped with an end cover 2, a metal heat pipe 3, and the evaporation section 3a of the metal heat pipe 3 is arranged in the inner tube 1a of the double-glass vacuum tube 1 In the chamber, the condensing section 3b is located outside the end cover 2, and the outside of the evaporating section 3a is provided with a cylindrical metal heat-collecting fin 4 welded with the evaporating section 3a. The outer surface of the metal heat-collecting fin Coated with a selective coating for high absorption of solar radiation, characterized in that: the outer wall of the inner tube 1a of the double glass vacuum tube 1 is coated with a low-emissivity (low-E) film with high solar radiation transmittance and low long-wave radiation rate ; The thickness of the (low-E) film coated on the outer wall of the inner tube 1a is 80...

Embodiment 2

[0011] A high-efficiency double-glass vacuum heat pipe solar heat collection tube, including a double-glass vacuum tube 1, the right end of the double-glass vacuum tube 1 is equipped with an end cover 2, a metal heat pipe 3, and the evaporation section 3a of the metal heat pipe 3 is arranged in the inner tube 1a of the double-glass vacuum tube 1 In the chamber, the condensing section 3b is located outside the end cover 2, and the outside of the evaporating section 3a is provided with a cylindrical metal heat-collecting fin 4 welded with the evaporating section 3a. The outer surface of the metal heat-collecting fin Coated with a selective coating for high absorption of solar radiation, characterized in that: the outer wall of the inner tube 1a of the double glass vacuum tube 1 is coated with a low-emissivity (low-E) film with high solar radiation transmittance and low long-wave radiation rate ; The thickness of the (low-E) film coated on the outer wall of the inner tube 1a is 20...

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Abstract

This invention relates to a high efficient double glass vacuum hot tube solar energy heat-collector characterizing that a low radiation membrane of high penetration rate of solar radiation and low rate of long wave radiation is coated on the outside wall of the inner tube of a double glass vacuum tube, so that the sun can irradiate onto the heat tube and its metal heat-collecting rib plates directly via a glass to shorten the path of solar energy in the heat-collecting tube and reduce the long wave radiation in the inner tube of the vacuum tube and heat loss.

Description

technical field [0001] The invention relates to utilization of solar energy, in particular to a high-efficiency double-glass vacuum heat pipe solar heat collection pipe. Background technique [0002] Reducing energy consumption and environmental protection are hot topics in the whole society at present. Solar energy is a kind of clean energy, and the utilization of solar energy has been paid more and more attention by people. Vacuum heat pipe solar heat collector tube is the core component of solar water heaters. Its function is to transfer solar heat energy. Its performance directly affects the efficiency of vacuum heat pipe solar water heaters. At present, there are two main types of vacuum heat pipe solar collector tubes: single glass vacuum heat pipe solar collector tubes and double glass vacuum heat pipe solar collector tubes. The single-glass vacuum heat pipe solar collector tube seals the heat pipe evaporation section with fins in the single-layer vacuum glass tube. ...

Claims

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Application Information

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IPC IPC(8): F24J2/05F24J2/32F24J2/24F24S10/40F24S10/70F24S10/95
CPCY02E10/44
Inventor 郑荣进傅莉霞张建高
Owner ZHEJIANG UNIV
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