HAD-AIR ] Gas-Air Preheater
This program is HAD-AIR which can design the gas-air preheater by calculating heat transfer of exhaust gas and air. The program can calculate the following contents.
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Tube type : Bare tube/Solid finned tube
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Pressure drop : Gas side/Air side
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Max. temperature of tube side
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Detail information of heat transfer
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Acid dew point
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Multi Gas pass condition
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* Thermal Design Calculation of Gas-Air Preheater *
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Customer : Test01
Gas Composition
CO2(Weight/Volume Fraction) % 16.6109 11.0000
SO2(Weight/Volume Fraction) % 0.0000 0.0000
N2(Weight/Volume Fraction) % 73.4336 76.0000
H2O(Weight/Volume Fraction) % 5.5635 9.0000
O2(Weight/Volume Fraction) % 4.3920 4.0000
HCL(Weight/Volume Fraction) % 0.0000 0.0000
GAS FLOW
Weight kg/hr 19504.
Normal Volume Nm3/hr 15000.
Density kg/Nm3 1.3003
Weight kg/sec 5.42
AIR FLOW
Weight kg/hr 12819.
Normal Volume Nm3/hr 10000.
Density kg/Nm3 1.2819
Weight kg/sec 3.56
GAS SIDE
GAS FLOW kg/hr 19504.
INLET PRESSURE mmAq 100.00
OUTLET PRESSURE mmAq 85.18
PRESSURE DROP mmAq 14.82
INLET TEMPERATURE deg C 200.0
OUTLET TEMPERATURE deg C 118.4
TEMPERATURE DIFF. deg C 81.6
FOULING FACTOR m2-hr-c/kcal 0.0004
AIR SIDE
FLUID FLOW kg/hr 12819.
INLET PRESSURE mmAq 500.00
OUTLET PRESSURE mmAq 451.12
PRESSURE DROP mmAq 48.88
INLET TEMPERATURE deg C 20.0
OUTLET TEMPERATURE deg C 150.3
TEMPERATURE DIFF. deg C 130.3
HEAT ABSORBED KW 476.89
HEAT ABSORBED kcal/hr 410336.2
FOULING FACTOR m2-hr-c/kcal 0.0002
Gas Side Velocity
Mean Velocity m/sec 4.59
Air Side Velocity
Mean Velocity m/sec 7.50
Tube metal temperature
1st Max. Tube Temp deg C 181.0
1st Min. Tube Temp deg C 156.0
Last Max. Tube Temp deg C 105.9
Last Min. Tube Temp deg C 80.9
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* Geometry *
GAS SIDE
FLOW CONFIGURATION COUNTER-CURR
TUBE ARRANGEMENT SQUARE
GAS SIDE SHLL
Number of shell passes 1
Number of tube passes 4
Width of Gas-Air Preheater mm 1700.0
Length of Gas-Air Preheater mm 5000.0
Tube Length(heating tube) mm 2100.0
Tube Diameter mm 50.80
Tube Min Thickness mm 2.7000
Number of Transverse Tubes 20
Transverse Spacing mm 85.000
Number of Longitudinal Rows 60
Longitudinal Spacing mm 85.000
Finned Type.(1=No,2=Solid) 1
Tube Roughness mm 0.10000
Surface area(Tube Outside) m 402.17
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* Heat Transfer *
Surface area(Tube Outside) m 402.17
UO kcal/m2-hr-c 14.62
LMTD 71.32
LMTD Correction factor 0.9782
Correction CMTD degC 69.77
Gas side heat transf. kcal/m2-hr-c 38.34
Air side heat transf. kcal/m2-hr-c 23.64
Enthapy of Inlet Flue Gas kcal/kg 47.03
Enth. of Outlet Flue Gas kcal/kg 25.93
HEAT ABSORBED kcal/hr 410336.2