PSV Reaction Force Calculation [PDF]

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PSV Reaction Force Calculation



117



Calculation No. :



For any Gas, Vapor, or Steam



24-PSV-240/241



PSV Tag No. : Project :



Coal Boiler Plant



Prepared by :



C'WHY



Date :



31-Aug-2010



Remarks : Open Discharge System



Flow of any gas or vapor



W=



81804



Ratio of specific heats (Cp/Cv)



k=



1.001



Temperature at inlet



T=



515.6



Molecular Weight of the process fluid



M=



18.02



kg/h



= 22.7233333 kg/s



°C



=



788.75



°K



A = 345.0424 cm2



= 34504.2378 mm2



P=



1.05



= 1.02969825 barg



Dynamic Load Factor (impact factor) DLF =



2.00



Area of the outlet at the point of discharge Static Pressure within the outlet at the point of discharge Specific heat at constant pressure



Cp



Specific heat at constant volume



Cv



Reaction Force at the point of discharge to the atmosphere



F



kg/cm2



Calc. Formula API Recommended Practice 520 Sec. 2.4.1 for gas, vapor, or steam discharge in metric units:



(



F = DLF × 129 W



√



kT + 0 .1 ( AP ) ( k +1 ) M



Reaction Force,



)



F = 34539.1 N =



3522



kgf



at PSV Nozl



460812611.xls



-why-



02/20/2020 - 16:36:43