Q7. In a double-pipe heat exchanger of 10 m length, a hot fluid flows in the annulus and a cold fluid flows in the inner pipe. The temperature profiles of the hot (T) and cold (T) fluids along the length of the heat exchanger (x, such that x 2 0), are given by A A A T, (x) = 80 – 3x T. (x) = 20 + 2rwhere T, and T, are in °C, and x is in meter. The logarithmic mean temperature difference (in °C) is (A) 24.6 A A (B) 27.9 (C) 30.0 (D) 50.0

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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4) (a) (b) (c)
Answer
5) (a) (b)
Answer
6) (a) (b)
Answer
7) (a) (b) (c)
Answer
8) (a) (b)
Answer
9) (a) (b)
(d)
Q7. In a double-pipe heat exchanger of 10 m length, a hot fluid flows in the annulus
and a cold fluid flows in the inner pipe. The temperature profiles of the hot (T,) and
cold (T) fluids along the length of the heat exchanger (x, such that x > 0), are given by
(c)
(d)
(c)
T (x) = 80 – 3x
T. (x) = 20 + 2rwhere T, and T, are in °C, and x is in meter.
The logarithmic mean temperature difference (in °C) is
(A) 24.6
%3D
(d)
%3D
(c)
(c)
(d)
Answer
(B) 27.9
10) (a)
(b) (c) (d)
(C) 30.0
Answer
==:
=====
(D) 50.0
Transcribed Image Text:4) (a) (b) (c) Answer 5) (a) (b) Answer 6) (a) (b) Answer 7) (a) (b) (c) Answer 8) (a) (b) Answer 9) (a) (b) (d) Q7. In a double-pipe heat exchanger of 10 m length, a hot fluid flows in the annulus and a cold fluid flows in the inner pipe. The temperature profiles of the hot (T,) and cold (T) fluids along the length of the heat exchanger (x, such that x > 0), are given by (c) (d) (c) T (x) = 80 – 3x T. (x) = 20 + 2rwhere T, and T, are in °C, and x is in meter. The logarithmic mean temperature difference (in °C) is (A) 24.6 %3D (d) %3D (c) (c) (d) Answer (B) 27.9 10) (a) (b) (c) (d) (C) 30.0 Answer ==: ===== (D) 50.0
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