L = 4.5m Doz I 12 Dis 12.5mm 18.5 mm Hot, B Cold fluid A flows on the outside of a concentric tube heat exchanger and en

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L 4 5m Doz I 12 Dis 12 5mm 18 5 Mm Hot B Cold Fluid A Flows On The Outside Of A Concentric Tube Heat Exchanger And En 1 (87.93 KiB) Viewed 21 times

L = 4.5m Doz I 12 Dis 12.5mm 18.5 mm Hot, B Cold fluid A flows on the outside of a concentric tube heat exchanger and enters at -20°C. Hot fluid B flows on the inner tube of the heat exchanger and enters at 200°C. The inside diameter is 12.5mm, the outside diameter is 18.5mm. The tube between the two fluids is very thin and has negligible thermal resistance. The tube has a length of 4.5m. for convection coefficients, use NU₂ = 0.023 Rep Pr for the cold side, use the hydraulic diameter as D₁ = 4 Ac/p Assume constant fluid properties: cold, A Hot, B 0.25 ko/s mass flow rate. 0.25 kg/s r 1300 kg/m³ 1000 kg/m³ 0.00025 0.0010 m² 2700 kgk 4200 kgk k 0.25 W/mk 0.40 W/mK 1) find the exchanger effectiveness. 2) find the heat transfer from the hot to the cold fluid. 3) find the exit temperature for the hot fluid. Cold, A T: m C