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Engineering and Tech / Thermodynamics: An Engineering Approach 8 / Chapter 5 / Problem 537

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

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Solved: Refrigerant-134a enters a diffuser steadily as

Chapter 5, Problem 537

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QUESTION:

Refrigerant-134a enters a diffuser steadily as saturated vapor at 600 kPa with a velocity of 160 m/s, and it leaves at 700 kPa and 408C. The refrigerant is gaining heat at a rate of 2 kJ/s as it passes through the diffuser. If the exit area is 80 percent greater than the inlet area, determine (a) the exit velocity and (b) the mass flow rate of the refrigerant.

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QUESTION:

Refrigerant-134a enters a diffuser steadily as saturated vapor at 600 kPa with a velocity of 160 m/s, and it leaves at 700 kPa and 408C. The refrigerant is gaining heat at a rate of 2 kJ/s as it passes through the diffuser. If the exit area is 80 percent greater than the inlet area, determine (a) the exit velocity and (b) the mass flow rate of the refrigerant.

ANSWER:

Step 1 of 5

R-134a is decelerated in a diffuser from a velocity of . The exit velocity of R-134a and the mass flow rate of the R-134a are to be determined.

Assumptions are

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

2. Potential energy changes are negligible.

3. There are no work interactions.

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