Stainless steel tube heat transfer coefficient
Thread Content
I want to make a casing heat exchanger by myself, using 2 cents stainless steel tubes to make coiled tubes, with water on the tube side and thermal oil on the shell side. This requires calculating the heat exchange area of 2 cents stainless steel tubes. So, can any expert give advice on what is the appropriate thermal conductivity of stainless steel tubes?
The thermal conductivity of stainless steel pipe is 14kcal/(mhk)
You can take a look at the link below http://bbs.hcbbs.com/viewthread.php?tid=370392 In addition, the thermal conductivity of materials also changes according to temperature. You should be able to find relevant data in some material manuals.
You can find it if you check it online. It is definitely lower than carbon steel.
It should be around 4 million. The value on the second floor is a bit too conservative.
Stainless steel 16W/m.℃ at 30℃. 1% carbon steel 45W/m.℃ at 18℃. Sourced from Dai Gance's "Introduction to Transfer Phenomenon" p177. The numbers on the 2nd floor are basically consistent with what I checked, so they seem to be more reliable. Because 14kcal/(mhk)=14000 * 4.18/3600W/m.℃=16.26W/m.℃ is consistent with the value I checked. The person on the 5th floor may have only read the title of the original poster, looked at the numerical value and unit, and the answer should be the total heat transfer coefficient. The author's title is indeed inaccurate. This post was last edited by lucky1909 on 2009-4-14 15:12 ]
The thermal conductivity of stainless steel has too little impact on heat transfer, so it doesn't need to be so precise. I think the original poster meant the heat transfer coefficient mentioned in the title.
Stainless steel generally recommends 16W/m.℃, but it is related to temperature.
Is it necessary to determine the thermal conductivity of the material very accurately? The thermal conductivity of the material often has little effect on the K value.