A steel tube with a thermal conductivity of 55 W/m.K carries a fluid at 175°C, with a convection heat transfer coefficient of 190 W/m²./K. The tube has an external diameter of 5 cm, a wall thickness of 1 cm and a length of 1.5 m. The ambient air and surroundings are at 27°C, with a convection heat transfer coefficient of 20 W/m².K. Neglecting the effects of radiation, determine: a) the resistance by conduction through the tube wall b) the convection resistance inside the tube c) The total rate of heat transfer

A steel tube with a thermal conductivity of 55 W/m.K carries a fluid at 175°C, with a convection heat transfer coefficient of 190 W/m²./K. The tube has an external diameter of 5 cm, a wall thickness of 1 cm and a length of 1.5 m. The ambient air and surroundings are at 27°C, with a convection heat transfer coefficient of 20 W/m².K. Neglecting the effects of radiation, determine: a) the resistance by conduction through the tube wall b) the convection resistance inside the tube c) The total rate of heat transfer

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter1: Basic Modes Of Heat Transfer

Section: Chapter Questions

Problem 1.19P: 1.19 A cryogenic fluid is stored in a 0.3-m-diameter spherical container is still air. If the...

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Concept explainers

Conduction and Convection

When energy travels from one object to another it is said to have undergone heat transfer. Heat transfer is nothing but the transfer of thermal energy or internal energy from one thing to another, like e.g., when a vessel with water, kept on top of a burner, heats up because of the flame underneath it.

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A steel tube with a thermal conductivity of 55 W/m.K carries a fluid at 175°C, with a convection heat transfer coefficient of 190 W/m²./K. The tube has an external diameter of 5 cm, a wall thickness of 1 cm and a length of 1.5 m. The ambient air and surroundings are at 27°C, with a convection heat transfer coefficient of 20 W/m².K. Neglecting the effects of radiation, determine:
a) the resistance by conduction through the tube wall
b) the convection resistance inside the tube
c) The total rate of heat transfer

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