Sistema de Aire
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Transcript of Sistema de Aire
printing date: 04/18/2023 document.xls v1.00 (18/11/2003)
Rev.: A Sheet: 1
By: FR Of: 2
CLIENT:
JOB:
AIR RECEIVER CALCULATIONSProcess Data
= 249 SCMH total air consumption
= 0 % air dryer consumption
249 SCMH total air requirement
Fluid AirM = 28.9 g/mol molecular weightg = 1.4 - heat capacity ratio (Cp/Cv)
= 29.1 J/(mol K) heat capacity
Discharge from Vessel
= 249 SCMH discharge flow rate
= 5.08 kg/min discharge mass flow rate
= 9.3 barg initial pressure
= 6.5 barg final pressure
t = 20.70 min time
= 37.8 °C initial temperature
Isothermal Process
Final Temperature
= 37.8 °C
Exchanged Heat9,408 kJ 2,247 kcal
Average Heat Exchange Rate7.6 kW 109 kcal/min
Required VolumeV = 34.1 m³
Adiabatic Process
Final Temperature
= 11.3 °C
Exchanged Heat0 kJ 0 kcal
Average Heat Exchange RateQ = 0 kW 0 kcal/min
Required VolumeV = 45.8 m³
ns
nd
Cp
ns
ms
P0
Pf
T0
Tf
Tf
printing date: 04/18/2023 document.xls v1.00 (18/11/2003)
printing date: 04/18/2023 document.xls v1.00 (18/11/2003)
Rev.: A Sheet: 2
caso A Qentrada 600 By: FR Of: 2
CLIENT:
JOB:
AIR RECEIVER CALCULATIONSVessel Design
1 - number of vessels
OD = 84.00 in outer diameter 2,134 mm 2,102Ltt = 12,497 mm length t/t
V = 45.780 m³ volume per vessel
= 45.780 m³ total volume
5.9 - Ltt/OD
= 11.4 barg design pressure
S = 20 ksi maximum allowable stress
E = 1 - welding efficiency
C = 3.20 mm corrosion thicknessr = 7,800 kg/m³ material density
= 12.0 mm required thickness
= 0.63 in standard thickness 16.0 mmW = 11,919 kg empty weight per vessel
Vessel Filling
= 1,019 SCMH inlet flow rate
= 249 SCMH outlet flow rate
= 20.77 kg/min inlet mass flow rate
= 5.08 kg/min outlet mass flow rate
= 6.5 barg initial pressure
= 9.3 barg final pressure
= 11.3 °C initial temperature
= 500.0 °C inlet temperature
Isothermal Process
Final Temperature
= 11.3 °C
Required Timet = 9.8 min
Adiabatic Process
Final Temperature Calculated Final Pressure
= 86.3 °C 9.29 barg
Required Time SOLVEDt = 2.2 min 0.00
Vtot
Pd
tr
tstd
ne
ns
me
ms
P0
Pf
T0
Te
Tf
Tf
printing date: 04/18/2023 document.xls v1.00 (18/11/2003)
Rev.: A Sheet:
By: FR Of:
CLIENT:
JOB:
AIR RECEIVER CALCULATIONSVessel Design
EQUATIONS
Volume Calculation
Discharge from Vessel
Isothermal Process
Vessel Volume
Total Exchanged Heat
Adiabatic Process
Vessel Volume
Initial Mole Nomber
Vessel Sizing & Filling
Vessel Sizing
Required Vessel Thickness
Vessel Filling
Isothermal Process
Required time
2 0.4d
R Cd
P ODt t
S E P
0
s
f
RT n tV
P P
11
p f sQ C T t n
g
0fV P Pt
RT n
0 0
0
0 1
0
1
s
f
RT nV
P
tn n
P
P
g
printing date: 04/18/2023 document.xls v1.00 (18/11/2003)
Adiabatic Process
Temperature-time equation
Pressure-time equation
Time Constant
References
11
f
nsn T T n n te e s n
n T T n ne e o s
gg g
g g
0 1f
Rn tP
V
3
0
0
e
s
Vesselvolume m
JUniversal Gas Constant 8.3145
m K
Initial Pressure Pa
Final Pressure Pa
Initial Absolute Temperature K
Final Absolute Temperature K
n Inlet Molar Flow Rate mol/s
n Outlet Molar Flow Rate m
f
f
V
R
P
P
T
T
0
p
v
ol/s
n Net Molar Flow Rate mol/s
n Initial Mole Number mol
Time s
C= Heat Capacity Ratio -
C
Q Exchanged Heat J
t
g
Inlet Absolute Temperature KeT
0n
n