What is the heat loss through the windows of a passenger train left outside a station in winter, assuming that the temperature inside the train is 20°C, outside the train, -20°C, total heat transfer area 40 m². The thickness of glass wall may be taken as 0.5 cm. The thermal conductivity of glass is 0.88 W/(m.K).

What is the heat loss through the windows of a passenger train left outside a station in winter, assuming that the temperature inside the train is 20°C, outside the train, -20°C, total heat transfer area 40 m². The thickness of glass wall may be taken as 0.5 cm. The thermal conductivity of glass is 0.88 W/(m.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.

Chapter4: Numerical Analysis Of Heat Conduction

Section: Chapter Questions

Problem 4.5P

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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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What is the heat loss through the windows of a passenger train left outside a station in winter, assuming that the
temperature inside the train is 20°C, outside the train, -20°C, total heat transfer area 40 m2. The thickness of glass
wall may be taken as 0.5 cm. The thermal conductivity of glass is 0.88 W/(m.K).

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