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Water at 20 °C flows at 3 m/s in the annulus of a c The annulus is the area between two concentric annulus has a diameter of 25 mm and the outer wall

Water at 20 °C flows at 3 m/s in the annulus of a c The annulus is the area between two concentric annulus has a diameter of 25 mm and the outer wall

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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Water at 20 °C flows at 3 m/s in the annulus of a concentric tube heat exchanger. The annulus is the area between two concentric circles. The inner wall of the annulus has a diameter of 25 mm and the outer wall a diameter of 50 mm. What is the pressure drop over 30 meters if i) the walls are taken as smooth? ii) the walls are made of commercial steel? Water has p = 10³ kg/m³ and µ = 10-³ Pa.s.
Transcribed Image Text:Water at 20 °C flows at 3 m/s in the annulus of a concentric tube heat exchanger. The annulus is the area between two concentric circles. The inner wall of the annulus has a diameter of 25 mm and the outer wall a diameter of 50 mm. What is the pressure drop over 30 meters if i) the walls are taken as smooth? ii) the walls are made of commercial steel? Water has p = 10³ kg/m³ and µ = 10-³ Pa.s.
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Step 1: Darcy-Welsbach equation for the pressure drop

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