(assume certain values which are not provided to you ) The class includes 40 people. Heat loss from the walls of the class, including the glass windows, is negligible. A flow of cold air enters the classroom via the main entrance, flows in the classroom, and then leaves through an emergency exit door located at the back of the class. Both the entrance door and the emergency exit door have the same dimensions of 1.2 m length and 1.9 m height. Assuming steady-state heat transfer upon reaching the room temperature at a constant value: a-If cold air enters the room at 20 °C, the heat generated due to the metabolism of a student/lecturer is 70 W, and air flow rate through both doors is 0.05 m/s, determine the room temperature. Assume that the changes in properties of air during the increase in room temperature may be safely ignored. b-Why is volume not necessary to solve part (a)
(assume certain values which are not provided to you )
The class includes 40 people. Heat loss from the walls of the class, including the glass windows, is negligible. A flow of cold air enters the classroom via the main entrance, flows in the classroom, and then leaves through an emergency exit door located at the back of the class. Both the entrance door and the emergency exit door have the same dimensions of 1.2 m length and 1.9 m height. Assuming steady-state heat transfer upon reaching the room temperature at a constant value:
a-If cold air enters the room at 20 °C, the heat generated due to the
metabolism of a student/lecturer is 70 W, and air flow rate through both
doors is 0.05 m/s, determine the room temperature. Assume that the
changes in properties of air during the increase in room temperature may
be safely ignored.
b-Why is volume not necessary to solve part (a)
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