m/s) 5. Two streams of air are mixed in a steady-flow mixing chamber that has two inlets and a single exit. Specifically, 1 m/s of air at 120 kPa, 40°C is mixed with 2 m/s of air at 120 kPa, 90°C, resulting in a mixture at 120 kPa and 70°C. The part of the pipe that contains the mixture has a cross-sectional area of 0.1 m2. Determine the mass flow rate of the two entering airstreams and the velocity of the air mixture.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
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First Law of Thermodynamics Conservation of Mass

 

no. 5

kg/s, 0.212 m/s, 0.433 m/s)
5. Two streams of air are mixed in a steady-flow mixing chamber that has two
inlets and a
single exit. Specifically, 1 m/s of air at 120 kPa, 40°C is mixed with
2 m/s of air at 120 kPa, 90°C, resulting in a mixture at 120 kPa and 70°C.
The part of the pipe that contains the mixture has a cross-sectional area of
0.1 m?. Determine the mass flow rate of the two entering airstreams and the
velocity of the air mixture.
[Answers: 1.336 kg/s, 2.304 kg/s, 29.86 m/s]
6. Dry air enters an industrial dryer with a pressure of 101 kPa and temperature
of 250°C, and at a mass flow rate of 2.6 kg/h through a duct with a cross-
sectional area of 0.85 m?. A wet material is placed inside the dryer, and its
dryer and the average velocity of air entering the dryer, assuming steady
operation.
rate of drying is 5.5 g/min. Determine the mass flow rate of gases leaving the
[Answer: 4.546 m/h]
First Law of Thermodynamics Conservation of Mass - 1
72
Transcribed Image Text:kg/s, 0.212 m/s, 0.433 m/s) 5. Two streams of air are mixed in a steady-flow mixing chamber that has two inlets and a single exit. Specifically, 1 m/s of air at 120 kPa, 40°C is mixed with 2 m/s of air at 120 kPa, 90°C, resulting in a mixture at 120 kPa and 70°C. The part of the pipe that contains the mixture has a cross-sectional area of 0.1 m?. Determine the mass flow rate of the two entering airstreams and the velocity of the air mixture. [Answers: 1.336 kg/s, 2.304 kg/s, 29.86 m/s] 6. Dry air enters an industrial dryer with a pressure of 101 kPa and temperature of 250°C, and at a mass flow rate of 2.6 kg/h through a duct with a cross- sectional area of 0.85 m?. A wet material is placed inside the dryer, and its dryer and the average velocity of air entering the dryer, assuming steady operation. rate of drying is 5.5 g/min. Determine the mass flow rate of gases leaving the [Answer: 4.546 m/h] First Law of Thermodynamics Conservation of Mass - 1 72
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