11-65 In a textile manufacturing plant, the waste dyeing water (c=4295 J/kg-K) at 80°C is to be used to preheat fresh water (c=4180 J/kg-K) at 10°C at the same flow rate in a double-pipe counterflow heat exchanger. The heat transfer sur- face area of the heat exchanger is 1.65 m², and the overall heat transfer coefficient is 625 W/m².K. If the rate of heat transfer in the heat exchanger is 35 kW, determine the outlet tempera- ture and the mass flow rate of each fluid stream.
11-65 In a textile manufacturing plant, the waste dyeing water (c=4295 J/kg-K) at 80°C is to be used to preheat fresh water (c=4180 J/kg-K) at 10°C at the same flow rate in a double-pipe counterflow heat exchanger. The heat transfer sur- face area of the heat exchanger is 1.65 m², and the overall heat transfer coefficient is 625 W/m².K. If the rate of heat transfer in the heat exchanger is 35 kW, determine the outlet tempera- ture and the mass flow rate of each fluid stream.
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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Question
Transcribed Image Text:le C:/Users/MEGA/Downloads/Cengel.%20Heat%20and%20mass%20Transfer%20Fur
600°C. Plot the rate of heat transfer, the exit temperature of
exhaust gases, and the rate of evaporation of the water as a
function of the temperature of the exhaust gases, and discuss
the results.
11-65 In a textile manufacturing plant, the waste dyeing
water (c=4295 J/kg-K) at 80°C is to be used to preheat fresh
water (c=4180 J/kg-K) at 10°C at the same flow rate in a
double-pipe counterflow heat exchanger. The heat transfer sur-
face area of the heat exchanger is 1.65 m², and the overall heat
transfer coefficient is 625 W/m².K. If the rate of heat transfer
in the heat exchanger is 35 kW, determine the outlet tempera-
ture and the mass flow rate of each fluid stream.
Dyeing
water
19
80°C
Tout
FIGURE P11-65
Fresh
water
10°C
Th.out
11-66 A performance test is being conducted on a double-
pipe counterflow heat exchanger that carries engine oil and
water at a flow rate of 2.5 kg/s and 1.75 kg/s, respectively.
Since the heat exchanger has been in service for a long time, it
IT
a
C
30
el
0.
ex
da
the
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