Concept explainers
The overall heat transfer coefficient based on the inner and the outer surface of copper tube.
Explanation of Solution
Given:
The heat capacity for hot fluid
The inlet temperature for hot fluid
The length of tube
The thermal conductivity of copper
The inner diameter of inner tube
The outer diameter of inner tube
The mass flow rate of hot fluid
The exit temperature of hot fluid
The inlet temperature for cold fluid
The outlet temperature for cold fluid
The outside fouling factor
The outside fouling factor
Calculation:
Refer Table A-19 “Properties of liquid”.
Obtain the following properties of liquid corresponding to the temperature of
Refer Table A-15 “Properties of water”.
Obtain the following properties of liquid corresponding to the average temperature of
Calculate the inner surface areas of the heart exchanger.
Calculate the outer surface areas of the heart exchanger.
Calculate the volume flow rate of the oil.
Calculate the Reynolds number for the oil.
Calculate the mass flow rate of cooling water.
Calculate the hydraulic diameter of the annular space on the shell side.
Calculate the average velocity of cooling water.
Calculate the number for the flow of water.
Calculate the friction factor for oil.
Calculate the friction factor for water.
Calculate the Nusselt number for oil.
Calculate the inner convective heat transfer coefficient for oil.
Calculate the Nusselt number for water.
Calculate the inner convective heat transfer coefficient for water.
Calculate the overall heat transfer coefficient.
Calculate the overall heat transfer based on the inner surface.
Calculate the overall heat transfer based on the outer surface.
Thus, overall heat transfer based on the outer surface is
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Chapter 22 Solutions
Fundamentals of Thermal-Fluid Sciences
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