# Introduction on Non-Ideal Vapor Power Cycles

In the first three lessons of this chapter, we studied the

#### ideal Rankine Vapor Power Cycle

.In this lesson, we will consider the ways in which real vapor power cycles deviate from ideal behavior and why.

There are four main reasons that real vapor power cycles are not as efficient as

#### ideal Rankine Vapor Power Cycles

:- Heat Losses
- Fluid Friction
- Mechanical Losses
- Condenser Subcooling

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