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

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...

AI Technical Summary

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

Images