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Physics 14 Online
OpenStudy (anonymous):

A flat composite plate is made of two layers of aluminum and steel of 5cm and 2cm thickness respectively. the thermal conductivity of aluminum and steel are 205W/mK and 45W/mK respectively. the hot surface of aluminum side is in contact with hot liquid at 200 deg C, the heat transfer coefficient of liquid film is 14W/m2K. The cold side steel is in contact with liquid at 25 deg C, heat transfer coefficient of liquid film being 29 Wm2K Overall coefficient of heat transfer? Heat transfer rate from hot liquid to cold liquid through a surface area of 10m2?

OpenStudy (vincent-lyon.fr):

Add up thermal resistances in series.

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