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Heat Transfer in a Pipe

Heat Transfer in a Pipe

Heat Transfer in a Pipe

(OP)
I want to put in two miles of pipe to convey a product from my facility to a plant down the street.  How do I calculate the temperature at the end of the uninsultated pipe?

RE: Heat Transfer in a Pipe

Dear brian21954,

You have only stated two miles(10560 feet),the other data required is diameter,material of construction,fluid properties or The fluid ,the initial temperature,the prevaling wind speed in your location(for overground pipe)..

There are graphs,indicating heat loss per square foot of exposed area (BTU/SQ FT),from which you can calculate the heat lost ,which then can be translated into temperature drop for your inside fluid.
If you have a temperature sensitive case,then you should insulate to avoid any problems..

For references,check in Kern (Process Heat Transfer)

Regards,

Whylie

RE: Heat Transfer in a Pipe

If it is important to control the temperature of the product, you could also install electric heat tracing along the pipe.  This can of the self regulating style or mineral insulated cable with temperature control.  It would require insulation to be effective, but would allow you to regulate the temperature coming into your other plant.

Tim

RE: Heat Transfer in a Pipe

on a theretical basis.
The problem is a heat  transfer in a  pipe which is  long  enough that the flow  is completely  developed . The condition out side  is  such that the constant temperature conditions  prevails . You can directly apply the  basic  correlations  to calculate the  heat transfer coefficientand  thereby the heat loss knowing  the  temperature  of  the fluid  at inlet and  the  ambient temperature. The process demands an iterative  solution to get  the  fluid temperature  at  the  exit of  the pipe.

RE: Heat Transfer in a Pipe

(OP)
This is a real situation. The prospective customer is about two miles away and they want to know the delivery conditions of a gas product.  I am trying to determine the conditions I don't insulate the pipe.

RE: Heat Transfer in a Pipe

I use WinSim to model this type of pipelines all the time.  From experience, if you have turbulent flow, you'll be right at ground temperature within two miles.  

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