How to calculate the heat loss of pipes
Thread Content
Knowing the flow rate and temperature of the smoke at the starting point, how can one calculate how much the temperature drops after the pipe has traveled 200 meters? I seek advice from the experts! I’d like to add that, as our company wants to save money, the pipes are of DN1800 size; insulation requires a significant amount of money. Since it’s summer now, we want to save as much as possible, so we’d like to calculate just how much the temperature will drop. This post was last edited by yourp on 2009-2-11 16:43]
You can refer to the calculation methods for pipeline insulation in this book. http://bbs.hcbbs.com/viewthread.php?tid=257996&highlight=%B9%A9%C8%C8%B9%A4%B3%CC
You can refer to the chapter on heat transfer.
It should also be known: the density of gas； Pipe diameter, wall thickness, material ； Insulation thickness, material ； Data such as ambient temperature.
It should be based on the flue gas temperature； Calculations of parameters such as pipe diameter, wall thickness, material and thermal conductivity, insulation layer thickness and material, as well as ambient temperature.
It is necessary to know the heat transfer temperature difference, the heat transfer area, the heat transfer coefficient of the pipe material, as well as the flow conditions of the air; the flow velocity of the gas should also have an impact. The thermal resistance should be mainly caused by the gas film; the heat transfer coefficient of the pipe material can likely be ignored. The heat transfer temperature difference isn’t constant either, which seems a bit annoying! Wait for the experts!