The heat loss from uninsulated hot water pipes installed in homes can be considerable and hence increases

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The heat loss from uninsulated hot water pipes installed in homes can be considerable and hence increases the overall energy cost of the home. Consider a 5-m-long section of such a pipe that has an outer diameter of 1.7 cm and a surface temperature of 75°C. If the room air temperature is 20°C, calculate the natural convection heat loss from the pipe section. If the radiation heat losses are to be included as well, determine its contribution as a percentage of the total pipe heat transfer rate; assume that the outer pipe surface has an emissivity of 0.7.

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Principles Of Heat Transfer

ISBN: 9781305387102

8th Edition

Authors: Frank Kreith, Raj M. Manglik, Mark S. Bohn

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