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Engineering and Tech / Thermodynamics: An Engineering Approach 8 / Chapter 5 / Problem 551

Thermodynamics: An Engineering Approach | 8th Edition | ISBN: 9780073398174 | Authors: Yunus A. Cengel

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Answer: Carbon dioxide enters an adiabatic compressor at

Chapter 5, Problem 551

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QUESTION:

Carbon dioxide enters an adiabatic compressor at 100 kPa and 300 K at a rate of 0.5 kg/s and leaves at 600 kPa and 450 K. Neglecting kinetic energy changes, determine (a) the volume flow rate of the carbon dioxide at the compressor inlet and (b) the power input to the compressor.

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QUESTION:

Carbon dioxide enters an adiabatic compressor at 100 kPa and 300 K at a rate of 0.5 kg/s and leaves at 600 kPa and 450 K. Neglecting kinetic energy changes, determine (a) the volume flow rate of the carbon dioxide at the compressor inlet and (b) the power input to the compressor.

ANSWER:

Step 1 of 4

is compressed by a compressor. The volume flow rate of at the compressor inlet and the power input to the compressor are to be determined.

Assumptions are

1. This is a steady-flow process since there is no change with time.

2. Kinetic and potential energy changes are negligible.

3. Helium is an ideal gas with variable specific heats.

4. The device is adiabatic and thus heat transfer is negligible.

The gas constant of is , and its molar mass is (Table A-1). The inlet and exit enthalpies of are (Table A-20)

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