[Dsg-rich] Assumptions for the N2 purge test

[Pablo Campero]

Hello, 




Some assumptions for the RICH nitrogen purge test by using Nitrogen cylinder gas as supply: 



RICH nitrogen volume: 5000 [l] 

Inlet Nitrogen pipe: 3/8 '' 

Inside Nitrogen pipe: 1/4 '' (6 pipes per inlet line) 

Outlet Nitrogen pipe: 3/4 '' 



Area for 3/8 ''-pipe: 0.11 [in^2] 

Area for 1/4''-pipe (x 6): 0. 29[in ^2] 

Ratio (Inside/Inlet area): 2.64 



Max allowed pressure: 15 [psi] (Pressure after the regulator in the N2 gas cylinder) 

Inside RICH pressure: 14.69 [psi] (atmospheric pressure) 

Calculated flow rate: ~ 250 [LPM] 

Time to supply the entire RICH volume with nitrogen: ~ 20 min/line (If two lines are used ~10 [min]) 



Based on the results, there won't back pressure, and we'll be able to flow the nitrogen at ~ 250 [l/min] without exceeding the established max pressure (15 [psi]). 



Best Regards, 

Pablo 
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