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Method for maintaining thermal stability of permafrost foundation and complete solar refrigeration device

A permafrost-based, heat-stabilized technology, applied in refrigerators, refrigeration and liquefaction, energy-saving heating/cooling, etc., can solve problems such as inability to work in warm seasons

Active Publication Date: 2010-07-28
NORTHWEST RES INST CO LTD OF C R E C
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The defect and gap in this method is that in the warm season, the hot rod almost stops working, the cooling effect is limited by the season, and there is a gap that cannot work in the warm season

Method used

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  • Method for maintaining thermal stability of permafrost foundation and complete solar refrigeration device
  • Method for maintaining thermal stability of permafrost foundation and complete solar refrigeration device
  • Method for maintaining thermal stability of permafrost foundation and complete solar refrigeration device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Determine the thickness of seasonal active layer of permafrost foundation

[0039] From September to November, conduct on-site geological cataloging and water content test in the permafrost base thermal stability maintenance zone, and determine the thickness of the active layer to be 1m;

[0040] (2) Embedding of high thermal conductivity materials

[0041] In the thermal stability maintenance zone of the permafrost foundation, transplant the turf outside the construction site and excavate the trench along the direction of the foundation. The width of the trench is set to 1m and the depth is 1m; after the trench is excavated, horizontally in the trench Place a high thermal conductivity material every 20cm in the vertical direction, and backfill the original soil layer by layer; after the high thermal conductivity material is buried, the original transplanted turf on the ground surface will be restored and maintained;

[0042] (3) Buried and installed solar adsorption refrig...

Embodiment 2

[0048] (1) Determine the thickness of seasonal active layer of permafrost foundation

[0049] From September to November, the geological radar exploration method was used in the permafrost-based thermal stability maintenance area to determine the thickness of the active layer to be 3.5m;

[0050] (2) Embedding of high thermal conductivity materials

[0051] In the thermal stability maintenance zone of permafrost soil foundation, transplant the turf outside the construction site, and excavate the trench along the direction of the foundation. The width of the trench is set to 1.5m and the depth is 3.5m; A line of high thermal conductivity material is placed every 50cm in the horizontal and vertical directions, and the original soil is backfilled layer by layer; after the high thermal conductivity material is buried, the original transplanted turf on the ground surface is returned and maintained;

[0052] (3) Buried and installed solar adsorption refrigeration device

[0053] (3.1) Hole s...

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Abstract

The invention discloses a method for maintaining the thermal stability of a permafrost foundation, which adopts solar adsorption refrigeration technology comprising the following steps: a, determining the thickness of a seasonal active layer of the permafrost foundation; b, burying a high-thermal conductivity material; c, burying and installing the solar adsorption refrigeration device; and d, exchanging heat in the foundation into the air with the solar adsorption refrigeration device so as to reduce the temperature of the permafrost foundation and maintain the thermal steady state. The invention also discloses the solar adsorption refrigeration device for use in combination the method, which comprises a solar thermal collector and a foundation evaporator, wherein the foundation evaporator is buried underground; and the upper end of the foundation evaporator is connected with absorption and desorption gas ducts which are connected through each pipeline and are connected with the solar thermal collector respectively. The method of the invention effectively relieves the influences of global warming on the permafrost foundation. The device of the invention is strong in practicability, simple in structure and conveniently buried, and can solve the problem that a thermal rod cannot work in warm seasons.

Description

Technical field [0001] The invention relates to the field of methods for cooling the permafrost ground and maintaining its thermal stability, in particular to a method for maintaining the thermal stability of the permafrost ground. The invention also includes a solar adsorption refrigeration device matched with the method. Background technique [0002] At present, in my country’s permafrost regions, the main methods for maintaining the stability of permafrost foundations are: laying rubble and gravel on the outside of the foundation or forming a thermal barrier at the interface with the natural ground, and burying the ventilation pipe in the middle or bottom of the foundation A ventilation pipe heat dissipation structure is formed, and the hot rod is buried in the permafrost layer of the foundation to increase the cold storage of the permafrost layer. These methods mainly have the following limitations: [0003] (1) The method of using rubble and crushed stone to form a thermal bar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D3/115F25B17/00F25B27/00
CPCY02B30/62Y02A30/27
Inventor 米维军熊治文韩龙武李勇
Owner NORTHWEST RES INST CO LTD OF C R E C
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