Water is to be heated from 20°C to 70°C as it flows through a 40 mm internal Hiameter and 600 mm long tube. The outer surface of the tube is wrapped with electrical wire which acts as an electrical resistance heater. The heater provides uniform heat flux throughout the surface of the tube. The outer surface of the heater is well insulated. At steady state if the system provides hot water at 0.2475 kg/s, determine the power rating of the resistance heater and the inner surface temperature of the pipe at the exit. p= 990 kg/m³: k = 0.631 W/(m K); Cp 4180 J/(kg K); v = 0.66 x 10-6 m²/s; Pr-4.328
Water is to be heated from 20°C to 70°C as it flows through a 40 mm internal Hiameter and 600 mm long tube. The outer surface of the tube is wrapped with electrical wire which acts as an electrical resistance heater. The heater provides uniform heat flux throughout the surface of the tube. The outer surface of the heater is well insulated. At steady state if the system provides hot water at 0.2475 kg/s, determine the power rating of the resistance heater and the inner surface temperature of the pipe at the exit. p= 990 kg/m³: k = 0.631 W/(m K); Cp 4180 J/(kg K); v = 0.66 x 10-6 m²/s; Pr-4.328
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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Transcribed Image Text:Water is to be heated from 20°C to 70°C as it flows through a 40 mm internal
diameter and 600 mm long tube. The outer surface of the tube is wrapped with electrical wire
which acts as an electrical resistance heater. The heater provides uniform heat flux throughout
the surface of the tube. The outer surface of the heater is well insulated. At steady state if the
system provides hot water at 0.2475 kg/s, determine the power rating of the resistance heater
and the inner surface temperature of the pipe at the exit.
990 kg/m³: k
0.631 W/(m K); C 4180 J/(kg K); v = 0.66 x 10-6 m²/s;
P
Pr-4.328
=
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