Engineering, 26.11.2019 22:31 makayla10119
An 8-m-long, uninsulated square duct of cross section 0.2 m x 0.2 m and relative roughness 10^-3 passes through the attic space of a house. hot air enters the duct at 1 atm and 80°c at a volume flow rate of 0.15 m^3 /s. the duct surface is nearly isothermal at 60°c. determine the rate of heat loss from the duct to the attic space and the pressure difference between the inlet and outlet sections of the duct. evaluate air properties at a bulk mean temperature of 80°c. is this a good assumption?
Answers: 3
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An 8-m-long, uninsulated square duct of cross section 0.2 m x 0.2 m and relative roughness 10^-3 pas...
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