Calculate Pipeline Pressure decay

[zane009]

I am needing to calculate the pressure decay of a liquid ammonia pipeline (-33 oC). I am wanting to calculate the decrease in line pressure and discharge flowrate from a leak in the pipeline. This it to represent how much material is release after the isolation valve system is activated.

Thanks for any assistance

 

[BigInch]

Type "Leak" in the above left search box and look at page 2

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"Pumping systems account for nearly 20% of the world’s energy used by electric motors and 25% to 50% of the total electrical energy usage in certain industrial facilities." - DOE statistic (Note: Make that 99.99% for pipeline companies)

http://virtualpipeline.spaces.live.com/

 

[dcasto]

The pressure decay will be a fuction of ground temperature and heat transfer. The -33 C is the tempearture with 1 atm on the line, which means it won't come out. But, as the line gains heat from the ground, it will boil and the vapours will be released.