In a double-pipe counter-flow heat exchanger, water is heated by steam condensing at 130°C (hfg=2203 kJ/kg) in the shell. Water (Cp=4180 J/kg·°C) enters the 3.5-cm internal-diameter tube of heat exchanger at 19°C at a rate of 3.5 kg/s. Overall heat transfer coefficient of the heat exchanger is 850 W/m2·°C. Determine the length of the tube required in order to heat the water to 90°C using (a) the LMTD method and (b) the ɛ–NTU method.
In a double-pipe counter-flow heat exchanger, water is heated by steam condensing at 130°C (hfg=2203 kJ/kg) in the shell. Water (Cp=4180 J/kg·°C) enters the 3.5-cm internal-diameter tube of heat exchanger at 19°C at a rate of 3.5 kg/s. Overall heat transfer coefficient of the heat exchanger is 850 W/m2·°C. Determine the length of the tube required in order to heat the water to 90°C using (a) the LMTD method and (b) the ɛ–NTU method.
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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In a double-pipe counter-flow heat exchanger, water is heated by steam condensing at 130°C (hfg=2203 kJ/kg) in the shell. Water (Cp=4180 J/kg·°C) enters the 3.5-cm internal-diameter tube of heat exchanger at 19°C at a rate of 3.5 kg/s. Overall heat transfer coefficient of the heat exchanger is 850 W/m2·°C. Determine the length of the tube required in order to heat the water to 90°C using (a) the LMTD method and (b) the ɛ–NTU method.
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