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Thermodynamics: An Engineering Approach | 8th Edition | ISBN: 9780073398174 | Authors: Yunus A. Cengel
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Solved: Air enters a 30-cm-diameter cooling section at 1

Chapter 14, Problem 1467

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QUESTION:

Air enters a 30-cm-diameter cooling section at 1 atm, 358C, and 45 percent relative humidity at 18 m/s. Heat is removed from the air at a rate of 750 kJ/min. Determine (a) the exit temperature, (b) the exit relative humidity of the air, and (c) the exit velocity.

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QUESTION:

Air enters a 30-cm-diameter cooling section at 1 atm, 358C, and 45 percent relative humidity at 18 m/s. Heat is removed from the air at a rate of 750 kJ/min. Determine (a) the exit temperature, (b) the exit relative humidity of the air, and (c) the exit velocity.

ANSWER:

Step 1 of 6


Air enters a cooling section at a specified pressure, temperature, velocity, and relative humidity.

           

The exit temperature, the exit relative humidity of the air, and the exit velocity are to be determined.

Assumptions are

1. This is a steady-flow process and thus the mass flow rate of dry air remains constant during the entire process .

2. Dry air and water vapor are ideal gases. 3 The kinetic and potential energy changes are negligible.

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