A steam pipe with 80 mm diameter passes through a room at 25°C (both air and walls). The pipe is painted to white and its surface temperature is 180°C. Determine the total rate of heat loss from the surface per unit length of pipe, if the convective heat transfer coefficient is 15 W/m2-K.

A steam pipe with 80 mm diameter passes through a room at 25°C (both air and walls). The pipe is painted to white and its surface temperature is 180°C. Determine the total rate of heat loss from the surface per unit length of pipe, if the convective heat transfer coefficient is 15 W/m2-K.

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 1.9P: Heat is transferred at a rate of 0.1 kW through glass wool insulation (density=100kg/m3) with a 5-cm...

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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.

Question

A steam pipe with 80 mm diameter passes through a room at 25°C (both air and
walls). The pipe is painted to white and its surface temperature is 180°C. Determine the total
rate of heat loss from the surface per unit length of pipe, if the convective heat transfer
coefficient is 15 W/m2-K.

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