Comparison between Serrated & Notched Serrated Heat Exchanger Fin Performance Presented by NABILA RUBAIYA

Basics of Heat Exchanger

Plate Fin Heat Exchanger

Different Types of Plate Fin

Serrated Plate fin

Notched Serrated Plate Fin

Heat Transfer Theory Q = h A ΔT = h A (Tin - Tout) ΔP = ρ f (L/D) (V2/2) Q = Convection heat transfer rate ΔP = Pressure drop h = Heat transfer coefficient ρ = Air density A = Fin surface area f = Friction factor Tin = Fluid inlet temperature L/D = length to diameter ratio Tout = Fluid outlet temperature V = Air inlet velocity

Desired Performance Temperature difference Pressure drop

Pressure Drop Result (Serrated)

Pressure Drop Result (Notched Serrated)

Air Outlet Temperature (Serrated)

Air Outlet Temperature (Notched Serrated)

Final Result Temperature & Pressure for V= 5m/s Serrated Fin H.E Notched Serrated Fin H.E Change of temp of air from inlet to outlet 0.1 K 0.05 K Change of pressure across the total volume 46 Pa 29 Pa

Conclusion Heat exchanger working procedure Heat transfer and pressure drop theory Effect of surface area on heat exchanger performance Performance calculating parameters ANSYS Fluent simulations Notched serrated fin is more efficient than traditional serrated fin for pressure drop performance Serrated fin is more efficient than notched serrated fin for heat transfer performance

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