Chapter 7, Problem 7.45P

Interpretation Introduction

Interpretation

To Find S_G, W_lost and ${\eta }_t$ ( Thermodynamic efficiency)

Concept Introduction:

Consider operating conditions (a)

Where,

$W_{ideal}=\Delta H-T_{\sigma }.\Delta S$

${\eta }_t=\frac{W_{ideal}}{W}$

$S_G=\Delta S$

$W_{lost}=T_{\sigma }.\Delta S$

Where

$\Delta S$ = Change in Entropy = 0.009 KJ/(kg.K)

Cp = Molar heat capacity

R = Universal Gas Constant

$\eta$ = Given efficiency

Change in Enthalpy, $\Delta H=11.57\frac{kJ}{kg}$

Work of the pump $W=11.57\frac{kJ}{kg}$

Change in temperature, $T_{\sigma }=300.K$