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A heat exchanger is to consist of a number of tubes each 25 mm diameter and 5 m long arranged in parallel. The exchanger is to be used as a cooler with a rating of 4 M W and the temperature rise in the water feed to the tubes is to be 20 deg K. If the pressure drop over the tubes is not to exceed 2 kN/m2, calculate the minimum number of tubes that are required. Assume that the tube walls are smooth and that entrance and exit effects can be neglected. Viscosity of water = 1 mNs/m2

A heat exchanger is to consist of a number of tubes each 25 mm diameter and 5 m long arranged in parallel. The exchanger is to be used as a cooler with a rating of 4 M W and the temperature rise in the water feed to the tubes is to be 20 deg K. If the pressure drop over the tubes is not to exceed 2 kN/m2, calculate the minimum number of tubes that are required. Assume that the tube walls are smooth and that entrance and exit effects can be neglected. Viscosity of water = 1 mNs/m2

Introduction to Chemical Engineering Thermodynamics
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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A heat exchanger is to consist of a number of tubes each 25 mm diameter and 5 m long
arranged in parallel. The exchanger is to be used as a cooler with a rating of 4 M W and
the temperature rise in the water feed to the tubes is to be 20 deg K.
If the pressure drop over the tubes is not to exceed 2 kN/m2, calculate the minimum
number of tubes that are required. Assume that the tube walls are smooth and that entrance
and exit effects can be neglected. Viscosity of water = 1 mNs/m2

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