Ethanol is vaporized at 78°C (hfg = 846 kJ/kg) in a double-pipe parallel-flow heat exchanger at a rate of 0.03 kg/s by hot oil (cp = 2200 J/kg·K) that enters at 120°C. If the heat transfer surface area and the overall heat transfer coefficients are 6.2 m2 and 320 W/m2·K, respectively, determine the outlet temperature and the mass flow rate of oil using (a) the LMTD method and (b) the «-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.
Ethanol is vaporized at 78°C (hfg = 846 kJ/kg) in a
double-pipe parallel-flow heat exchanger at a rate of 0.03 kg/s
by hot oil (cp = 2200 J/kg·K) that enters at 120°C. If the heat
transfer surface area and the overall heat transfer coefficients
are 6.2 m2 and 320 W/m2·K, respectively, determine the outlet
temperature and the mass flow rate of oil using (a) the
LMTD method and (b) the «-NTU method.
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