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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