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Thermodynamics: An Engineering Approach | 8th Edition | ISBN: 9780073398174 | Authors: Yunus A. Cengel
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Steam is throttled from 7 MPa and 5008C to a pressure of 1

Chapter 8, Problem 859

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QUESTION:

Steam is throttled from 7 MPa and 5008C to a pressure of 1 MPa. Determine the decrease in exergy of the steam during this process. Assume the surroundings to be at 258C.

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QUESTION:

Steam is throttled from 7 MPa and 5008C to a pressure of 1 MPa. Determine the decrease in exergy of the steam during this process. Assume the surroundings to be at 258C.

ANSWER:

Step 1 of 3

Steam is throttled from a specified state to a specified pressure.

The decrease in the exergy of the steam during this throttling process is 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. The temperature of the surroundings is given to be .

4. Heat transfer is negligible.

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