Water is to be heated from 20°C to 70°C as it flows through a 40 mm Inter 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. p = 990 kg/m³: k Pr-4.328 = 0.631 W/(m K); c = 4180 J/(kg K); v = 0.66 x 10-6 m²/s:

Water is to be heated from 20°C to 70°C as it flows through a 40 mm Inter 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. p = 990 kg/m³: k Pr-4.328 = 0.631 W/(m K); c = 4180 J/(kg K); v = 0.66 x 10-6 m²/s:

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Question

determine the value of AB.
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.
Р = 990 kg/m³; k = 0.631 W/(m K); c
Pr-4.328
= 4180 J/(kg K); v = 0.66 x 10-6 m²/s:

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