[Haichuan Fun Chemical] The special properties of liquid ammonia play a role on the plateau
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In order to deal with plateau frozen soil, keep the frozen soil in a stable state, and avoid heat damage to the railway subgrade, this iron rod is inserted deep into the subgrade. The liquid ammonia absorbs the heat deep in the subgrade, turns into gas, rises to the top of the iron rod, dissipates heat through the heat sink, and then turns into liquid and returns to the root of the iron rod. The cycle goes back and forth, continuously discharging heat from the subgrade, ensuring the safety of the subgrade. I really admire the scientists who study plateau permafrost, they are amazing.
This issue was solved by Guo Hongxin, the boss of Jiangsu Zhongsheng. The principle of heat exchange with hot rods has been used to solve the world's problems of summer melting and winter frost heaving in the permafrost area of the Golmud-Lhasa section of the Qinghai-Tibet Railway. The running speed of the Qinghai-Tibet Railway in the permafrost area has always been maintained at 100 kilometers per hour, far exceeding the average speed of 40 kilometers per hour for similar railways in the world. It broke the assertion of foreign scholars that it was "impossible" to build the railway. This section of the railway was built at an altitude of more than 3,000 meters, with 960 kilometers at an altitude greater than 4,000 meters and 550 kilometers in permafrost.
I have seen Canadian crude oil pipelines in the Arctic region using this technology before. It is not clear whether the heat exchange medium is ammonia.
This post was last edited by wjl7212 on 2020-6-2 17:53 This technology seems to have been around in the 1960s. The medium can be used in many types of industries, such as CO2, propane, Freon, and even water, as long as the application places are different. In theory, any medium that can be vaporized can be used as this heat exchange medium.
This post was last published by a wise man on 2020-6-2 21:49. Editors should not follow what others say! Some stories are told too much and they deceive themselves. The solid temperature rod was used in the long-distance crude oil pipeline in the western United States in 1978.
This post was last edited by wjl7212 on 2020-6-3 09:08. The second reply was edited. I have already said that this technology existed in the 1960s, and was later used by him on the Qinghai-Tibet Line to solve the problem of frozen soil thawing and freezing. What does it mean to follow what others say: L:L:L
Sorry, I didn't mean to accuse you. I have heard this story told with excitement many times by the person involved. The editor-in-chief of "Energy" magazine once exposed this lie after visiting the United States. In the 1980s and 1990s, not long after the country was opened, information was relatively limited. Some intellectuals used the information and knowledge they had to introduce advanced foreign technologies to solve problems. This was a good thing that benefited the country and the people. However, using advanced technology to apply for patents or even compile it into GB standards is a bit unscrupulous. No wonder it is called "stealing" by others.
Maybe this has been improved in China, such as the heat exchange medium is better maintained? ? ? ?
I accidentally discovered another topic with a story
I also first saw it in a feature film introducing oil pipelines in alpine regions.