Temperature of Nitrogen in a Pipe

[daz18983]

Hi, i am on work experience and they have given me a short task which is sort of the next step up from work i have done previously. Can anyone help me with the following:-

Vessel containing nitrogen at 50 ^oC

Nitrogen is pumped along a 30m length of pipe at a flow rate of 1.5 litres per minute

pipe line is at ambient temp 20 ^oC

I need to find the temperature of the Nitrogen upon it reaching the end of the pipe at 30m

I have calculated and gathered the following info -

pipe OD - 0.00635m
pipe ID - 0.00457m
Specific Heat Ration of Nitrogen (k) - 1.4
Absolute Preesure through pipe - 9bar
Density of nitrogen at 9bar - 9.47748 kg/m³

I'm not exactly sure how to start this?? But i have looked through some books and believe i need to work out the velocity first?? Any help would be greatly appreciated.

 

[daz18983]

Please ignore this post and refer to the later post on 01/07/2008 named "Thermodynamics Change in Gas Temperature along pipe" which is an attempt at the question and should be a clearer.

Thanks