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

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

Active Publication Date: 2012-08-29
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 the seasonal active layer of the permafrost foundation

[0039] From September to November, the geological records and moisture content tests were carried out in the permafrost foundation thermal stability maintenance area, and the thickness of the active layer was determined to be 1m;

[0040] (2), high thermal conductivity material embedding

[0041] In the permafrost foundation thermal stability maintenance area, the turf is transplanted outside the construction site, and trenches are excavated along the direction of the foundation. The width of the trench is set to 1m, and the depth is 1m; A layer of high thermal conductivity material is laid every 20cm vertically, 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 to its position and maintained;

[0042] (3), Buried and installed solar adsorption refrigeration dev...

Embodiment 2

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

[0049] From September to November, the geological radar survey method was used in the thermal stability maintenance area of ​​the permafrost foundation, and the thickness of the active layer was determined to be 3.5m;

[0050] (2), high thermal conductivity material embedding

[0051] In the permafrost foundation thermal stability maintenance area, the turf is transplanted outside the construction site, and trenches are excavated along the direction of the foundation. The width of the trench is set to 1.5m and the depth is 3.5m; A layer of high thermal conductivity material is laid every 50cm horizontally and vertically, 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 to its position and maintained;

[0052] (3), Buried and installed solar adsorption refrigera...

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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 foundation and maintaining its thermal stability, specifically a method for maintaining the thermal stability of the permafrost foundation, and the invention also includes a solar adsorption refrigeration device used in conjunction with the method. Background technique [0002] At present, in the permafrost regions of my country, the main methods to maintain the stability of permafrost foundations are: laying flakes and crushed stones on the outside of the foundation or at the interface with the natural ground to form a thermal barrier, and burying ventilation pipes 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 maintaining the sta...

Claims

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Application Information

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Patent Type & Authority Patents(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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