Hello.
Related to the thermal expansion in pipes and how to model the pressure vs time, we are discussing with another process engineer the following:
If we have 2 pipes, of 1" and 3", filled with water and without flow, exposed to the sun, with the time the two pipes rise to to the same pressure or the 3" pipe will have a higher pressure?. What do you think?
I am looking without fortune a formula to model the pressure in the pipe thru the time. Anyone have an idea?.
Thanks.
Full Version: How To Model Pressure In Thermal Expansion
It is a little more complicated than it looks on the surface.
I suggest you read the following article:
"Forestall Pipe Bursts", David C. Copenhaver, L. W. Coppari, S. G. Rochelle, Chemical Engineering Magazine, January 2001.
The change in liquid volume due to the change in temperature is what causes the rise of pressure in the pipe and there are a number of parameters that affect this including: length of pipe, linear thermal expansion coefficient of the liquid, change in temperature and finally the pipe ID (and this is raised to the power of 2). Therefore, we can conclude that the 3" pipe should obtain the greater pressure.
I suggest you read the following article:
"Forestall Pipe Bursts", David C. Copenhaver, L. W. Coppari, S. G. Rochelle, Chemical Engineering Magazine, January 2001.
The change in liquid volume due to the change in temperature is what causes the rise of pressure in the pipe and there are a number of parameters that affect this including: length of pipe, linear thermal expansion coefficient of the liquid, change in temperature and finally the pipe ID (and this is raised to the power of 2). Therefore, we can conclude that the 3" pipe should obtain the greater pressure.
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