Method for maintaining thermal stability of permafrost foundation by using semiconductor-driven heat pipe refrigeration
A permafrost foundation and semiconductor technology, applied in the fields of refrigerators, refrigeration and liquefaction, and machine operation modes, can solve problems such as failure to protect permafrost, and achieve the effects of preventing thermal thawing and subsidence and improving practicability.
Active Publication Date: 2020-01-03
NORTHWEST RES INST CO LTD OF C R E C
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Problems solved by technology
In the cold season, when the temperature of the evaporating section is higher than that of the cooling section, the refrigerant starts to circulate; in the warm season when the thermal erosion is the most serious, when the temperature of the evaporating section is higher than that of the cooling section, the cooling medium stops circulating. The heat pipes stop working, and the permafrost cannot be protected
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[0019] refer to figure 1 , 2 , the evaporation section 4 of the heat pipe 1 is placed in the permafrost layer, the transition section 3 and the heat dissipation section 2 are placed in the atmosphere; a semiconductor refrigeration device 7 is installed in the heat pipe transition section 3; a semiconductor refrigeration control is installed in the heat pipe heat dissipation section 2 device 13, and the semiconductor refrigeration controller 13 controls the semiconductor refrigeration device 7 to perform a refrigeration cycle.
[0020] Wherein, the heat pipe 1 is an internal heat collection type heat pipe, the heat dissipation section 2 of the heat pipe is provided with an external heat sink, the transition section 3 of the heat pipe is equipped with an internal heat sink 10 , and the evaporation section is filled with liquid refrigerant 9 .
[0021] refer to image 3 , 4 , the semiconductor refrigeration device 7 includes a semiconductor refrigerator 11 installed outside th...
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The invention provides a method for maintaining thermostabilization of a frozen soil foundation by utilizing a semiconductor for driving a heat pipe for refrigeration. An evaporation segment of the heat pipe is arranged in a perennial frozen soil layer, and a transition segment and a heat radiation segment are arranged in air; the transition segment of the heat pipe is provided with a semiconductor refrigeration device; and the heat radiation segment of the heat pipe is provided with a semiconductor refrigeration controller, and the semiconductor refrigeration controller controls the semiconductor refrigeration device for refrigeration circulation. According to the method, through forced refrigeration of the semiconductor refrigeration device, a negative temperature difference is generated by the evaporation segment and the heat radiation segment (or the transition segment) of the common heat pipe, and therefore the heat pipe can enhance circulating refrigeration in cold seasons, the heat pipe is forced to be started to work in warm seasons, whole year operation and circulating work of the heat pipe are achieved, and active refrigeration can be achieved especially in warm seasons of perennial frozen soil thawing seasons; and thaw settlement, inclination, cracking and other damage of the perennial frozen soil foundation can be effectively prevented and treated, and high practicality is achieved.
Description
technical field [0001] The invention relates to a method for maintaining thermal stability of permafrost foundations, in particular to a method for maintaining thermal stability of permafrost foundations by using semiconductor-driven heat pipe refrigeration. Background technique [0002] In the thermal stability operation and maintenance of permafrost subgrades, most of the domestic and foreign materials such as crushed stones and flakes are laid on the slope protection, road berms, subgrade bottom and other parts of the subgrade to form a thermal barrier to prevent the heat from being transferred downward in the warm season. To prevent the melting of permafrost. The use of these materials has played a certain role in the maintenance of thermal stability of permafrost subgrades. However, the gaps between crushed stones and flakes are easily covered by wind, sand or snow and lose the effect of convective heat transfer, causing the subgrade to suffer from thermal melting sink...
Claims
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IPC IPC(8): E01C3/04F25B21/02F28D15/02
CPCE01C3/04F25B21/02F28D15/02
Inventor 郑静米维军赵永虎屈耀辉武小鹏刘贺业李奋周有禄苗学云
Owner NORTHWEST RES INST CO LTD OF C R E C