Ethanol is vaporized at 788C (hfg 5 846 kJ/kg) in a double-pipe parallel-flow heat exchanger at a rate of 0.03 kg/s by hot oil (cp 5 2200 J/kg?K) that enters at 1208C. 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 e2NTU method.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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Ethanol is vaporized at 788C (hfg 5 846 kJ/kg) in a
double-pipe parallel-flow heat exchanger at a rate of 0.03 kg/s
by hot oil (cp 5 2200 J/kg?K) that enters at 1208C. 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 e2NTU method.

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