Practice Exergy Analysis Of Rankine Cycle (2) - Power and Refrigeration Cycles

Practice: Exergy Analysis of Rankine Cycle

Lesson 2Power and Refrigeration Cycles

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9 questions

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6 sample questions

Question 1.
Define exergy.
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Think about what work you can extract from energy.
Question 2.
What does the exergy balance equation represent?
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Recall the equation we discussed in class.
3Question 3.
What does exergy measure?
- Total energy
- Useful work potential
- Temperature variation
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Think about what it means to extract work from a system.
4Question 4.
True or False: Exergy destruction occurs in all thermodynamic processes.
- True
- False
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Consider the nature of real systems.
Question 5.
Consider a Rankine Cycle where the boiler input exergy is measured at 500 kJ and the output exergy after the turbine is 300 kJ. Calculate the exergy destroyed and the efficiency of the cycle.
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Use the exergy balance we've discussed in class.
Question 6.
In an effort to improve the Rankine Cycle's efficiency, engineers target the condenser where the exergy loss is at its peak. Discuss the methods that could be employed to minimize this loss.
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Think about how improvements can directly affect the cycle's output and efficiency.

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