2- A- Water is to be heated from 15°C to 65°C as it flows through a 3-cm-internal-diameter 5-m-long tube (Fig. below). The tube is equipped with an electric resistance heater that provides uniform heating throughout the surface of the tube. The outer surface of the heater is well insulated, so that in steady operation all the heat generated in the heater is transferred to the water in the tube. If the system is to provide hot water at a rate of 10 L/min: 1- determine the power rating of the resistance heater. 2- estimate the inner surface temperature of the pipe at the exit. 3- what is the hydraulic diameter of and tube and why?
2- A- Water is to be heated from 15°C to 65°C as it flows through a 3-cm-internal-diameter 5-m-long tube (Fig. below). The tube is equipped with an electric resistance heater that provides uniform heating throughout the surface of the tube. The outer surface of the heater is well insulated, so that in steady operation all the heat generated in the heater is transferred to the water in the tube. If the system is to provide hot water at a rate of 10 L/min: 1- determine the power rating of the resistance heater. 2- estimate the inner surface temperature of the pipe at the exit. 3- what is the hydraulic diameter of and tube and why?
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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Transcribed Image Text:2-
A- Water is to be heated from 15°C to 65°C as it flows through a 3-cm-internal-diameter 5-m-long tube (Fig.
below). The tube is equipped with an electric resistance heater that provides uniform heating throughout the
surface of the tube. The outer surface of the heater is well insulated, so that in steady operation all the heat
generated in the heater is transferred to the water in the tube. If the system is to provide hot water at a rate of 10
L/min:
1- determine the power rating of the resistance heater.
2- estimate the inner surface temperature of the pipe at the exit.
3- what is the hydraulic diameter of and tube and why?
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