Heat power loss from a district heating linewith two separate pipes: How big is the lossin W / m? Conditions: Outer pipe diameter of100 mm, insulation thickness of 50 mm,thermal conductivity of insulation of 0.03 W /mK, ground thermal conductivity of 1.5 W /mK, distance of 1 m between pipe center andground surface, distance of 0.6 m betweenpipe center, forward temperature of 80 °C,return temperature of 50°C, and ambienttemperature of 5°C.

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Heat power loss from a district heating line with two separate pipes: How big is the loss in W / m? Conditions: Outer pipe diameter of

Engineering Fundamentals: An Introduction to Engineering (MindTap Course List)

5th Edition

ISBN:9781305084766

Author:Saeed Moaveni

Publisher:Saeed Moaveni

Chapter11: Temperature And Temperature- Related Variables In Engineering

Section: Chapter Questions

Problem 29P

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Question

Heat power loss from a district heating line
with two separate pipes: How big is the loss
in W / m? Conditions: Outer pipe diameter of
100 mm, insulation thickness of 50 mm,
thermal conductivity of insulation of 0.03 W /
mK, ground thermal conductivity of 1.5 W /
mK, distance of 1 m between pipe center and
ground surface, distance of 0.6 m between
pipe center, forward temperature of 80 °C,
return temperature of 50°C, and ambient
temperature of 5°C.

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