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A desktop computer is to be cooled by a fan whose flow

Chapter 5, Problem 9P

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QUESTION:

Problem 9P

A desktop computer is to be cooled by a fan whose flow rate is 0.40 m3/min. Determine the mass flow rate of air through the fan at an elevation of 3400 m where the air density is 0.7 kg/m3. Also, if the average velocity of air is not to exceed 110 m/min, determine the minimum diameter of the casing of the fan.

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QUESTION:

Problem 9P

A desktop computer is to be cooled by a fan whose flow rate is 0.40 m3/min. Determine the mass flow rate of air through the fan at an elevation of 3400 m where the air density is 0.7 kg/m3. Also, if the average velocity of air is not to exceed 110 m/min, determine the minimum diameter of the casing of the fan.

ANSWER:

ANSWER:

Step 1:-

The air density at a height of 3400 m is .

Mass flow rate of the man is,

.

The mass flow rate is,

       

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