The suction fan of a building heating system draws ambient air at 100 kPa and 30 °C into a duct of 0.8 m inlet diameter with a mass flow rate of 1.65 kg/s. Within the duct, the air gets heated by a 25.0 kW heater and flows into a manifold with discharge outlet 1 and outlet 2, each of 0.5 m in diameter. A damper is fitted to outlet 2 to adjust the flow area and regulate the air discharge through it. The air temperature and pressure at each outlet are 65 °C and 116 kPa, respectively. The elevation difference between the air inlet and the outlets is negligible. It is given that the entire duct and manifold assembly is perfectly insulated. The air is to be treated as an ideal gas with Co=1.005 kJ/kg.K and R=0.287 kl/kg.K.

The suction fan of a building heating system draws ambient air at 100 kPa and 30 °C into a duct of 0.8 m inlet diameter with a mass flow rate of 1.65 kg/s. Within the duct, the air gets heated by a 25.0 kW heater and flows into a manifold with discharge outlet 1 and outlet 2, each of 0.5 m in diameter. A damper is fitted to outlet 2 to adjust the flow area and regulate the air discharge through it. The air temperature and pressure at each outlet are 65 °C and 116 kPa, respectively. The elevation difference between the air inlet and the outlets is negligible. It is given that the entire duct and manifold assembly is perfectly insulated. The air is to be treated as an ideal gas with Co=1.005 kJ/kg.K and R=0.287 kl/kg.K.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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