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Case Studies > Ecoflux* Corrugated Tube Heat Exchanger > Case 3
AQ. Ammonia Preheater

Shell & Tube Heat Exchanger Versus Ecoflux * Corrugated Tube Heat Exchangers

Process Parameters Units Shell Side Tube Side
AQ. AMMONIA PREHEATER
Fluid -- Boiler Feed Water Aqueous Ammonia
Flow Rate kg / hr 25607 26187
Temperature In / Out °C 128.2 / 85.5 38 / 80
Heat Load kcal / hr 1,098,000 1,098,000
Allowable Pressure Drop kg / cm2 0.7 0.7
Fouling Factor hr.m2.oC/kcal 0.0002 0.0003
Inlet Pressure kg / cm2 2.6 3.03
Design Pressure kg / cm2 5 5
Design Temperature oC 160 110
Test Pressure kg / cm2 7.5 7.5
Material Of Construction -- SS 304 L SS 304 L

Details Of Heat Exchanger Shell & Tube Cthe
No Of Tubes nos. 120 79
Tube O.D. mm 19.05 18
Tube Thickness mm1.65 0.70
Tube Length mm 6000 6000
Heat Transfer Area m2 43 26.8
Shell I.D. mm 387 267
No Of Passes nos. 4 1
Fluid Velocity In Shell m / s 0.35 0.21
Fluid Velocity In Tube m /s 1.27 0.44
Baffles nos. Provided Not Required
Actual Pressure Drop
Shell Side kg / cm2 0.20 0.006
Tube Side kg / cm2 0.40 0.03
Heat Trf. Coefficient
Design kcal / hr.m2.oC 637 855
Clean kcal / hr.m2.oC 2020 1791
Area Reduction % -- 37.6

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