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Practical Vapor-Compression Refrigeration Cycles

TS Diagram
Vapor-Compression Carnot Refrigeration Cycle

In Lesson A, we presented the problems associated with using the Carnot Cycle as a practical model for a real vapor-compression refrigeration cycle.

In this lesson, we present a practical cycle that approximates the

. We will also discuss

and how to select one.

Lesson 10B: page 1 of 9

In the previous lesson, we learned that the Carnot vapor-compression refrigeration cycle had two problems that made it impractical.
Both compressors and turbines work better when the working fluid is all in just one phase.
In this lesson, we present an ideal vapor compression refrigeration cycle that resolves these problems.
Keep in mind that this cycle is still ideal.
We will conclude the lesson with a discussion of the desirable and undesirable characteristics of a refrigerant.
Let’s get started.