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Howlin
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- how to calculate the w/m heat loss in pipework with xmm of insulation
Hi all,
I have a copper pipe which has 15mm of insulation on it. The outside radius of the pipe is 17.2mm and the inside radius is 14.8mm. The insulation will have a conductivity of 0.025.
I found an question which is meant to show an equation for the heat loss in an Insulated Cylinder or Pipe. I have attached an excel document which has this equation in it and the inputs.
When I calculate the heat loss in w/m, I get a figure if 11.27.
I am wondering is the correct, as it doesn't appear to be, I would have thought it to be lower, somewhere in the region of 8 or 9 w/m.
Can anyone tell me if it is right or where I might be going wrong?
I have a copper pipe which has 15mm of insulation on it. The outside radius of the pipe is 17.2mm and the inside radius is 14.8mm. The insulation will have a conductivity of 0.025.
I found an question which is meant to show an equation for the heat loss in an Insulated Cylinder or Pipe. I have attached an excel document which has this equation in it and the inputs.
When I calculate the heat loss in w/m, I get a figure if 11.27.
I am wondering is the correct, as it doesn't appear to be, I would have thought it to be lower, somewhere in the region of 8 or 9 w/m.
Can anyone tell me if it is right or where I might be going wrong?