A double-pipe heat exchanger is constructed of a copper (k = 380 W/m⋅K) inner tube of internal diameter Di = 1.2 cm and external diameter Do = 1.6 cm and an outer tube of diameter 3.0 cm. The convection heat transfer coefficient is reported to be hi = 700 W/m2⋅°C on the inner surface of the tube and ho = 240 W/m2⋅°C on its outer surface. The fouling factor is Rf, i = 0.0005 m2⋅°C/W on the tube side and Rf, o = 0.0002 m2⋅°C/W on the shell side. Determine the thermal resistance of the heat exchanger per unit length. The thermal resistance of the heat exchanger per unit length is _____ °C/W.
Heat Exchangers
Heat exchangers are the types of equipment that are primarily employed to transfer the thermal energy from one fluid to another, provided that one of the fluids should be at a higher thermal energy content than the other fluid.
Heat Exchanger
The heat exchanger is a combination of two words ''Heat'' and ''Exchanger''. It is a mechanical device that is used to exchange heat energy between two fluids.
A double-pipe heat exchanger is constructed of a copper (k = 380 W/m⋅K) inner tube of internal diameter Di = 1.2 cm and external diameter Do = 1.6 cm and an outer tube of diameter 3.0 cm. The convection heat transfer coefficient is reported to be hi = 700 W/m2⋅°C on the inner surface of the tube and ho = 240 W/m2⋅°C on its outer surface. The fouling factor is Rf, i = 0.0005 m2⋅°C/W on the tube side and Rf, o = 0.0002 m2⋅°C/W on the shell side.
Determine the thermal resistance of the heat exchanger per unit length.
The thermal resistance of the heat exchanger per unit length is _____ °C/W.
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