Hi
I have a 4 inch pipe of 150 ft in length which is assumed to be 90 % full of LNG.
If the initial pressure is 0 Psig How much time does it take to reach 100 Psig.
I have calculated till this part
I have assumed a heat in leak rate 138 Btu/hr for the pipe to calculate a vapor flow rate of 0.63 lb/hr based on 220 Btu/lb of mass heat of vaporization since LNG vaporizes slowly.
I assumed that since LNG is 90% full then rest of it is vapor.
I calculated the initial mass of vapor form of LNG to be 0.2 lb.
How can I calculate the time increment to pressure increments ?
Thank you
Edited by nivedita12, 18 June 2019 - 01:49 PM.