Chapter 8, Problem 8.20P

(a)

Interpretation Introduction

Interpretation:

Calculate efficiency of a Carnot engine operating between given temperature levels.

Concept Introduction:

The efficiency of Carnot engine is calculated as,

  ${\eta }_{\text{Carnot}}=1-\frac{T_C}{T_H}=\frac{Q_H-Q_C}{Q_H}=\frac{W_{net}}{Q_H}$

(b)

Interpretation Introduction

Interpretation:

Calculate the actual efficiency of the power cycle.

Concept Introduction:

Theactual efficiency is calculated as,

  ${\eta }_{actual}=\%\text{of }{\eta }_{\text{Carnot}}$

(c)

Interpretation Introduction

Interpretation:

What are the possibilities of the working fluid used for the power cycle.

Concept Introduction:

The choice of the working fluid used in the power cycle is depend on the efficiency of the power cycle.