Heat Loss to free air pipeline
Heat Loss to free air pipeline
(OP)
Hi everyone,
Probably I've done it before but it wasn't my best subject at the university.
At work I had a question about the heat loss of oil flowing through a pipeline in free air.
I have the following known parameters:
Type of oil
Mass flow
Starting temperature of the oil
Air temperature
Length, diameter and wall thickness of the pipeline.
I've found countless examples about heat exchangers but I'm struggling to find the temperature drop along a bare straight pipe without insulation with a fluid flowing through the pipe.
Can someone help me with this?
Probably I've done it before but it wasn't my best subject at the university.
At work I had a question about the heat loss of oil flowing through a pipeline in free air.
I have the following known parameters:
Type of oil
Mass flow
Starting temperature of the oil
Air temperature
Length, diameter and wall thickness of the pipeline.
I've found countless examples about heat exchangers but I'm struggling to find the temperature drop along a bare straight pipe without insulation with a fluid flowing through the pipe.
Can someone help me with this?





RE: Heat Loss to free air pipeline
RE: Heat Loss to free air pipeline
RE: Heat Loss to free air pipeline
That said, many heat trace companies (Thermon, Raychem, etc.) have design guides that have tables to estimate watt/ft for heat loss calcs. You could use something like that to calculate temp in versus temp out at the end of the line.
RE: Heat Loss to free air pipeline
Numerous online calculators for this. Also check insulation companies.
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P.E. Metallurgy, Plymouth Tube
RE: Heat Loss to free air pipeline
RE: Heat Loss to free air pipeline
Try engineering toolbox.
https://www.engineeringtoolbox.com/heat-loss-bare-...
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: Heat Loss to free air pipeline
If you need some quick rough values, look up Perry Chem Engg Handbook 7th edition, page 5-14, table 5-2.
RE: Heat Loss to free air pipeline
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: Heat Loss to free air pipeline
The only thing covering the pipeline is epoxypaint. No insulation because it's located at the harbour and it would be a risk to have corrotion.
If I finish the excel-template I will post it here