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Heat pipe receiver in intermediate temperature in use for generating electricity from solar heat

A solar thermal power generation and receiver technology, which is applied to solar thermal power generation, solar thermal collectors, solar thermal collectors using working fluid, etc. Solar radiation absorption and other issues, to achieve the effect of increasing service life, saving manufacturing costs, and improving heat transfer effect

Inactive Publication Date: 2007-02-21
NANJING TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The heat absorbing tube used in the existing parabolic trough concentrator has the following disadvantages: ① the metal expansion joint 17 is expensive, which makes the manufacturing cost of the heat absorbing tube relatively high, resulting in a high cost of the parabolic trough concentrator; ② too many welding points, The tensile stress caused by the expansion of each weld is strong, so that the vacuum degree between the glass casing 1 and the heat-absorbing steel pipe 15 is destroyed; ③The use of the shield 16 reduces the solar radiation absorption of the heat-absorbing pipe
These disadvantages have affected the efficiency and popularization of the technology

Method used

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  • Heat pipe receiver in intermediate temperature in use for generating electricity from solar heat
  • Heat pipe receiver in intermediate temperature in use for generating electricity from solar heat
  • Heat pipe receiver in intermediate temperature in use for generating electricity from solar heat

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The specific structure of the medium temperature heat pipe receiver for solar thermal power generation in this embodiment is as follows figure 2 As shown, it includes a glass sleeve 1 and a cooling fluid channel 3. The glass sleeve 1 is closed at one end and open at the other end, and also includes a medium-temperature heat-absorbing heat pipe 2. The medium-temperature heat-absorbing heat pipe 2 is inserted into the glass sleeve 1. The medium-temperature heat-absorbing heat pipe 2 Made of metal (carbon steel below 450°C, heat-resistant steel or low alloy steel above 450°C). The part of the medium-temperature heat-absorbing heat pipe 2 exposed to the glass sleeve 1 gradually shrinks into a smaller-diameter condensation section 8, the condensation section 8 is located in the cooling fluid passage 3, and is sealed with the cooling fluid passage 3, the medium-temperature heat-absorbing heat pipe 2 and the glass sleeve The open ends of the tubes 1 are sealed and connected b...

Embodiment 2

[0031] The specific structure of the medium temperature heat pipe receiver for solar thermal power generation in this embodiment is as follows image 3 as shown, Figure 4 for image 3 The A-A section diagram. The glass sleeve 1 of this embodiment is a double-layer glass sleeve, with a vacuum layer between the two layers of glass, and the outer surface of the part of the medium-temperature heat-absorbing heat pipe 2 located in the glass sleeve 1 is covered with a high-temperature-resistant selective absorption coating 6 . The closed end of the glass sleeve 1 is provided with a vacuum sealing tube 7 on the outer glass, which is used to evacuate the middle of the two layers of glass into a vacuum layer. Heat conduction fins 21 are also welded on the medium-temperature heat-absorbing heat pipe 2 , and a thermal insulation cap 13 and a filler 14 are provided at the sealed connection between the medium-temperature heat-absorbing heat pipe 2 and the open end of the glass sleeve 1...

Embodiment 3

[0034] The specific structure of the medium temperature heat pipe receiver for solar thermal power generation in this embodiment is as follows Figure 5 As shown, the glass sleeve 1 of this embodiment is a double-layer glass sleeve, with a vacuum layer between the two layers of glass, and the surface of the inner tube of the double-layer glass sleeve is covered with a high-temperature-resistant selective absorption coating 6 . The closed end of the glass sleeve 1 is provided with a vacuum sealing tube 7 on the outer glass, which is used to evacuate the middle of the two layers of glass into a vacuum layer. Heat conduction fins 21 are also welded on the medium-temperature heat-absorbing heat pipe 2 , and a thermal insulation cap 13 and a filler 14 are provided at the sealed connection between the medium-temperature heat-absorbing heat pipe 2 and the open end of the glass sleeve 1 . Other structures of this embodiment are the same as those of Embodiment 1.

[0035] Working proc...

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Abstract

A medium temperature heat tube receiver used on heat power generation unit of solar energy is featured as inserting medium temperature heat tube in glass jacket tube, setting condensation section on portion exposed from glass jacket tube by said heat tube, setting condensation section in channel of cooling fluid and connecting it with cooling fluid channel in seal connection mode, using seal element to make seal connection between opening end of glass jacket tube and said heat tube.

Description

technical field [0001] The invention relates to a solar absorbing device, in particular to a medium-temperature heat pipe receiver for solar thermal power generation. Background technique [0002] Using a parabolic trough concentrator to focus solar energy and generate high-temperature steam for power generation is a solar thermal power generation technology with a relatively simple structure and low technical difficulty. But a key technology involved therein——the sealing and thermal expansion between the vacuum glass sleeve and the heat absorbing tube become a major obstacle to the reliability, durability and cost of this technology. Thereby hindering the popularization of this technology. [0003] The structure of the heat absorbing tube used in the existing parabolic trough concentrator is as follows: figure 1 As shown, the heat-absorbing pipe is composed of a heat-absorbing steel pipe 15 coated with a high-temperature-resistant selective absorption coating 6 on its out...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24J2/32F24J2/24F24J2/05F24S10/95F24S10/40F24S10/70
CPCF24J2/055Y02E10/44F24J2/32F24S10/45F24S10/95
Inventor 张红战栋栋许辉庄骏陈兴元
Owner NANJING TECH UNIV
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