HAD-ECO ] Economizer
This program is called HAD-ECO which can design the Economizer by calculating the heat transfer of exhaust gas and water. The program can calculate the following contents.
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Tube type : Bare tube/Solid finned tube/Serrated finned tube
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Pressure drop : Gas side/Water side
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Max. temperature of tube/fin metal tubes
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Detail information of heat transfer
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ASME tube thickness (ASME section I)
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Acid dew point
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* Thermal Design Calculation of Economizer *
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Customer : test01
Gas Composition
CO2(Weight/Volume Fraction) % 25.5211 17.5830
SO2(Weight/Volume Fraction) % 0.2324 0.1100
N2(Weight/Volume Fraction) % 66.3304 71.7897
H2O(Weight/Volume Fraction) % 4.1010 6.9022
O2(Weight/Volume Fraction) % 3.8152 3.6151
Ar(Weight/Volume Fraction) % 0.0000 0.0000
GAS FLOW
Weight kg/hr 74295.
Normal Volume Nm3/hr 54919.
Density kg/Nm3 1.3528
Weight kg/sec 20.64
This calculator uses the method described by A G Okkes.
SO2(Weight) % 0.232421
SO2(Volume) % 0.110013
SO2 vppm 1100.13
SO3 vppm 35.52
Conversation ratio(SO2)=>(SO3) % 3.23
Acid dew point C 140.0166
GAS SIDE
GAS FLOW kg/hr 74295.
PRESSURE DROP mmAq 86.9
INLET TEMPERATURE deg C 284.0
OUTLET TEMPERATURE deg C 145.4
TEMPERATURE DIFF. deg C 138.6
SPECIFIC HEAT kcal/kg-C 0.2580
HEAT REJECTED KW 3087.20
HEAT REJECTED kcal/hr 2656292.5
RADIATION & CONVECTION LOSS % 1.4849
OTHER LOSS % 0.5000
FOULING FACTOR m2-hr-c/kcal 0.0001
TUBE SIDE
FLUID FLOW kg/hr 73225.
INLET PRESSURE kg/cm2-g 17.00
OUTLET PRESSURE kg/cm2-g 16.73
TUBE PRESSURE DROP Kg/cm2 0.27
INLET TEMPERATURE deg C 135.0
OUTLET TEMPERATURE deg C 169.5
TEMPERATURE DIFF. deg C 34.5
HEAT ABSORBED KW 3025.92
HEAT ABSORBED kcal/hr 2603567.8
FOULING FACTOR m2-hr-c/kcal 0.0005
Gas Side Velocity
Inlet Velocity m/sec 14.20
Outlet Velocity m/sec 10.67
Water Side Velocity
Inlet Velocity m/sec 0.58
Outlet Velocity m/sec 0.61
Tube & Fin metal temperature
Max. Tube Temp deg C 189.9
Min. Tube Temp deg C 136.9
Max. Fin Temp deg C 217.7
Min. Fin Temp deg C 139.4
Tube & Pipe Pressure drop(kg/cm2-a)
TUBE SIDE
INLET PRESSURE(abs) kg/cm2 18.03
OUTLET PRESSURE(abs) kg/cm2 17.76
TUBE PRESSURE DROP kg/cm2 0.27
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* Geometry *
GAS SIDE
Heating Surface m2 1375.4
Tube Diameter mm 50.80
Tube Min Thickness mm 4.0000
Tube Length mm 2657.4
Width of Economzier mm 2214.0
Tube Material A213 T11
Tube Design Temp (Standard) C 204.
Number of Transverse Tubes 26
Transverse Spacing mm 82.000
Number of tubes on w/steam side 1
Number of tube passes 32
Number of Longitudinal Rows 32
Longitudinal Spacing mm 150.000
Tube Arrang.(1=Stagg.,2=lnline) 1
Finned Type.(0=No,1=Solid,2=Serr.) 2
Flow Type.(Counter=1,Paralled.=2) 1
Fin Design Temp (Standard) C 226.
Fin Height mm 14.0000
Fin Thickness mm 1.2000
Fin pitch mm 12.7000
Fin per Meter ea/m 78.74
Fin per Inch ea/in 2.00
Fin Material C. Steel
Fin Segment mm 4.0000
Fin Base Height mm 5.0000
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* Heat Transfer *
TUBE SIDE
HEAT REJECTED(LMTD) Gcal/hr 2.719287
HEAT REJECTED(Correc.) Gcal/hr 2.656105
UO Correction factor 0.9000
LMTD Correction factor 0.9768
UO kcal/m2-hr-c 50.562531
UO X U Corr f kcal/m2-hr-c 45.506279
RTO m2-hr-C/kcal 0.0197775
RO m2-hr-C/kcal 0.0158557
RWO m2-hr-C/kcal 0.0004907
RIO m2-hr-C/kcal 0.0034310
HO kcal/m2-hr-c 74.893517
HI kcal/m2-hr-c 4139.504
KW kcal/m-hr-c 34.489674
KF kcal/m-hr-c 46.812187
Enthapy of Inlet Flue Gas kcal/kg 67.83
Enth. of Outlet Flue Gas kcal/kg 32.08
Enth. of Inlet Water kcal/kg 135.82
Enth. of Outlet Water kcal/kg 171.37
INLET PRESSURE(abs) kg/cm2 18.03
OUTLET PRESSURE(abs) kg/cm2 17.76
HEAT REJECTED kcal/hr 2656292.5
HEAT ABSORBED kcal/hr 2603567.8
Cp of flue gas(in) kJ/kg-degC 1.102949
Cp of flue gas(out) kJ/kg-degC 1.057030
Vis of flue gas(in) kg/m-sec 0.00002651
Vis of flue gas(out) kg/m-sec 0.00002149
K of flue gas(in) W/m-degC 0.041561
K of flue gas(out) W/m-degC 0.032296
rho of flue gas(in) kg/m3 0.663232
rho of flue gas(out) kg/m3 0.882777
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* ASME Tube Wall Thickness Calcuation (ASME Section 1 ) *
TUBE SIDE
Tube Material A213 T11
Tube Diameter mm 50.80
Tube Thickness(initial) mm 4.0000
Min. Wall Thickness(PG27.2.1) mm 1.2540
Corrosion allowance mm 1.0000
Min. Wall Thickness(Ca=0.0) mm 0.2540
Design Pressure (Pin x 1.2) bar_a 21.22
Max. Allowed Working Press bar_a 129.15
Max. Allowed Stress (Mater.) bar_a 1130.00
Tube Material A213 T11
Tube Design Temp (Standard) C 203
Max. Allowed Tube Temp.(Only) C 510
Max. Oxidizer Tube Temp.(Only) C 565
Fin Material C. Steel
Fin Design Temp (Standard) C 225
Max. Allowed Fin Temp.(Only) C 0