Sizing a Parallel Flow and Counter Flow Heat Exchangers: Detailed Calculation Guide
Detailed steps to determine the necessary length of the parallel flow heat exchanger. In this tutorial, we'll explore how to size a parallel flow concentric heat exchanger. Here, hot oil is cooled by water that jackets it. The given information includes: Oil: Enters at 100°C and leaves at 60°C Mass flow rate: 0.15 kg/s (kilograms per second) Heat capacity: 2131 J/kg°C (joules per kilogram degrees Celsius) Convective heat transfer coefficient: 38.8 W/m²°C (watts per meter squared degrees C) Water: Enters at 25°C and leaves at 50°C Convective heat transfer coefficient: 2250 W/m²°C (watts per meter squared degrees C) We aim to determine the length of the tube required for the necessary cooling. We'll make a couple of assumptions: negligible heat loss to the surroundings and a thin wall between the fluids, implying no conductive heat resistance between them. Governing Equation Our heat transfer rate (𝑄) is given by the equation: Q=U×A×ΔT log mean ...