Water flows at 50°C inside a 2.5-cm-inside-diameter tube such that hi = 3500 W/m² .°C. The tube has a wall thickness of 0.8 mm with a thermal conductivity of 16 W/m -°C. The outside of the tube loses heat by free convection with ho =7.6 W/m2 .°C. Calculate the overall heat-transfer coefficient and heat loss per unit length to surrounding air at 20°C. %3D

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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Water flows at 50°C inside a 2.5-cm-inside-diameter tube such that h; = 350o W/m² . °C. The
tube has a wall thickness of 0.8 mm with a thermal conductivity of 16 W/m - °C. The outside of
the tube loses heat by free convection with ho =7.6 W/m2.°C. Calculate the overall heat-transfer
coefficient and heat loss per unit length to surrounding air at 20°C.
Transcribed Image Text:Water flows at 50°C inside a 2.5-cm-inside-diameter tube such that h; = 350o W/m² . °C. The tube has a wall thickness of 0.8 mm with a thermal conductivity of 16 W/m - °C. The outside of the tube loses heat by free convection with ho =7.6 W/m2.°C. Calculate the overall heat-transfer coefficient and heat loss per unit length to surrounding air at 20°C.
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