Solar adsorption type refrigeration device and method for subgrade engineering in permafrost regions

An adsorption refrigeration and solar energy technology, applied in the field of permafrost engineering, can solve the problems of backward infrastructure, long engineering distance, difficult power supply, etc., achieve no consumption of electrical and mechanical energy, compact device structure, and prevent permafrost degradation. and heat-melt disease effects

Active Publication Date: 2018-03-09
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the long distance of the line project, the relatively backward infrastructure along the line, especially the difficulty of power supply, it cannot be used in a limited area like the artificial freezing construction method of building environment adjustment, industrial application, and mines, tunnels, and subways. Compression refrigeration method for network power supply

Method used

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  • Solar adsorption type refrigeration device and method for subgrade engineering in permafrost regions
  • Solar adsorption type refrigeration device and method for subgrade engineering in permafrost regions
  • Solar adsorption type refrigeration device and method for subgrade engineering in permafrost regions

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Embodiment 1

[0062] The embodiment of the present invention provides a solar adsorption refrigeration device and method for subgrade engineering in permafrost regions. By designing a vacuum sleeve structure nested inside and outside of stainless steel tubes and glass tubes, solar heat is collected to drive the refrigerant to circulate. , and use activated carbon-methanol as the refrigerant to carry out adsorption refrigeration to realize the maintenance of thermal stability of subgrade engineering in permafrost regions.

[0063] 1. One aspect of the embodiments of the present invention provides a solar adsorption refrigeration device for subgrade engineering in permafrost regions.

[0064] A schematic diagram of the structure of a solar adsorption refrigeration device for subgrade engineering in permafrost regions. Figure 1-6 As shown, the device mainly includes: stainless steel tube 20, glass tube 12, mechanical seal structure 1, glass-metal sealing joint 11, spring support 14, and conne...

Embodiment 2

[0118] This embodiment provides a solar adsorption refrigeration device for subgrade engineering in permafrost regions, and its specific realization structure is as follows Figure 1-6 As shown, the details are as follows:

[0119] The device mainly includes an evaporative refrigeration section 4 buried in the permafrost foundation, a mechanical seal structure 1 above the ground, a heat collection / adsorption section 2, and a condensation section 3. The heat collection / adsorption section 2 is composed of a stainless steel tube 20 , a refrigerant vapor channel 15 , and a solar selective absorption coating 13 . The condensation section 3 is formed by socketing a glass tube 12 and a stainless steel tube 20 through a glass-metal sealing joint 11 . The mechanical seal structure 1 is composed of a pressure relief valve 5 and a one-way valve 7 .

[0120] The manufacture of the solar adsorption refrigeration tube includes two parts: device processing and filling activated carbon-meth...

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Abstract

An embodiment of the invention provides a solar adsorption type refrigeration device and method for subgrade engineering in permafrost regions. The device mainly comprises a stainless steel pipe, a glass pipe, a mechanical sealing structure and connecting components, wherein the stainless steel pipe is nested in the glass pipe to form a vacuum casing pipe structure, the mechanical sealing structure is arranged at the top of the vacuum casing pipe structure, the part, embedded in frozen soil foundation, of the vacuum casing pipe structure is an evaporative refrigeration section, the part abovethe ground comprises a heat collecting / adsorbing section and a condensation section, and the heat collecting / adsorbing section and the evaporative refrigeration section are filled with an adsorbent and a refrigerant respectively; the heat collecting / adsorbing section automatically converts solar energy into heat energy to drive adsorption refrigeration cycle, and the refrigerant desorption processand the adsorption process is circularly performed by use of the night and day difference of solar intensity. Solar energy can be utilized for automatic adsorption refrigeration, frozen soil is efficiently protected in real time, and permafrost degradation and subgrade engineering heat damage are prevented effectively.

Description

technical field [0001] The invention relates to the technical field of frozen soil engineering, in particular to a solar adsorption refrigeration device and method for subgrade engineering in permafrost regions. Background technique [0002] China's permafrost is mainly distributed in the Qinghai-Tibet Plateau, the northern part of the Greater and Lesser Khingan Mountains in the northeast, the Tianshan Mountains and the Altai Mountains in the west, accounting for about 22.4% of the country's land area. When road construction is carried out in the above-mentioned areas, due to the changes in the heat exchange between the original natural surface and the atmosphere, the water and heat transport of the seasonal melting layer, etc., the water and heat balance of the original permafrost is broken, making the natural season under the roadbed The depth of the thawed layer changes and causes various undesirable permafrost phenomena. When the solid ice in permafrost liquefies, it wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B27/00F25B15/02F24S10/40F24S10/70
CPCF25B15/025F25B27/007Y02B30/62Y02A30/27
Inventor 刘建坤胡田飞刘大伟常键郝中华牛巍崴
Owner BEIJING JIAOTONG UNIV
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