Cold water (cp = 4180 J/kg·K) enters the tubes of a heat exchanger with 2-shell passes and 12-tube passes at 14°C at a rate of 3 kg/s, while hot oil (cp = 2200 J/kg·K) enters the shell at 200°C at the same mass flow rate. The overall heat transfer coefficient based on the outer surface of the tube is 300 W/m2·K and the heat transfer surface area on that side is 20 m2. Determine the rate of heat transfer using (a) the LMTD method and (b) the ε–NTU method
Heat Exchangers
Heat exchangers are the types of equipment that are primarily employed to transfer the thermal energy from one fluid to another, provided that one of the fluids should be at a higher thermal energy content than the other fluid.
Heat Exchanger
The heat exchanger is a combination of two words ''Heat'' and ''Exchanger''. It is a mechanical device that is used to exchange heat energy between two fluids.
Cold water (cp = 4180 J/kg·K) enters the tubes of a heat exchanger with 2-shell passes and 12-tube passes at 14°C at a rate of 3 kg/s, while hot oil (cp = 2200 J/kg·K) enters the shell at 200°C at the same mass flow rate. The overall heat transfer coefficient based on the outer surface of the tube is 300 W/m2·K and the heat transfer surface area on that side is 20 m2. Determine the rate of heat transfer using
(a) the LMTD method and
(b) the ε–NTU method
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