【Q&A Question 262】2018.09.25
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【Q&A Question 262】September 25, 2018: Briefly explain why fins are needed on the tubes of air coolers. Since the coolant used in air coolers is air, whose heat transfer coefficient is very low, whereas that of liquids is high, the main issue is that the thermal resistance associated with air controls the overall heat transfer coefficient. The purpose of adding fins to these tubes is to enhance the heat transfer efficiency, that is, to increase the overall heat transfer coefficient. (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) Correct: 3 wealth, Incorrect: 1 wealth ； Mass posting of posts – rated based on the lowest score ； Replies that are unrelated to the answer are considered spam and will be deleted immediately. For management purposes, if you need to view content from a few days ago, please go to https://bbs.hcbbs.com/home.php?mod=space&uid=3862647&do=thread&view=me&from=space through the summary post below
The heat transfer medium for air coolers is air, and the heat transfer efficiency of air is lower compared to that of water; therefore, fins need to be added to increase the heat exchange area
Increase the heat exchange area to boost heat dissipation
Increase the heat exchange area to improve heat exchange efficiency.
Air cooling is achieved through heat transfer via convection with air, and the fins on the air-cooling tube bundles can increase the heat transfer area and thus the heat transfer coefficient, which in turn enhances the cooling effect of air cooling.
Since the coolant used in air coolers is air, whose heat transfer coefficient is very low, whereas that of liquids is high, the main issue is that the thermal resistance associated with air plays a controlling role on the overall heat transfer coefficient. The addition of fins to the tubes is intended to enhance the heat transfer efficiency, that is, to increase the overall heat transfer coefficient
Since the coolant used in air coolers is air, whose heat transfer coefficient is very low, whereas that of liquids is high, the main issue is that the thermal resistance associated with air plays a controlling role on the overall heat transfer coefficient. The addition of fins to the tubes serves to enhance the heat transfer efficiency, that is, to increase the overall heat transfer coefficient.
Q=KHT. Since the coolant used in air coolers is air, and the heat transfer coefficient of air is very low, the main issue is that the thermal resistance associated with air plays a controlling role on the overall heat transfer coefficient. Therefore, fins are added to the tubes in order to enhance the heat transfer efficiency, that is, to increase the overall heat transfer coefficient K. At the same time, these fins increase the heat exchange area, thereby significantly raising the heat transfer amount Q
As air passes through the tube bundle, the fins separate the air that undergoes heat exchange first, allowing the air to cool down rapidly and providing cold air for the cooling of the subsequent tubes in the bundle
Since the coolant used in air coolers is air, whose heat transfer coefficient is very low, typically ranging from 15 to 50 kilocalories per meter·hour·°C, whereas the heat transfer coefficient of liquids is as high as several hundred kilocalories per meter·hour·°C, the main problem is that the thermal resistance associated with air plays a controlling role on the overall heat transfer coefficient. Therefore, the purpose of adding fins to the tubes is to enhance the heat transfer efficiency, that is, to increase the overall heat transfer coefficient.
Since the coolant used in air coolers is air, and the heat transfer coefficient of air is very low, the prominent problem is that the thermal resistance on the air side dominates the overall heat transfer coefficient. Therefore, the purpose of adding fins to the tubes is to enhance the heat transfer efficiency, that is, to increase the overall heat transfer coefficient. Since the coolant used in air coolers is air, and the heat transfer coefficient of air is very low, the prominent problem is that the thermal resistance on the air side dominates the overall heat transfer coefficient. Therefore, the purpose of adding fins to the tubes is to enhance the heat transfer efficiency, that is, to increase the overall heat transfer coefficient.