Set up the equations to determine the thermal efficiency for the cycle, annual operating cost and total life cycle cost of an actual diesel cycle using deductive problem

solving. Don't forget your unit check. Note: There are no numbers so no calculations are necessary. Use the simplest form for each equation and exact analysis for the

sentropic processes.

Explain how to find the best compression ratio and isentropic efficiency for this diesel engine. Provide graphs to illystrate your process.

You know the following information:

r $[-]$

ETA $-$

$[\frac{m^3}{k}g\}$

C$\_$uf $\frac{\text{\$}}{g}al$

rho$\_$f $[$kg$/$liter$]$

$LHV[k\frac{J}{k}g]$

OT $[$hr$/$yr$]$

$T[1][K]$

$P[1][kPa]$

omega $\frac{1}{m}in$

Displ $m^3$

CC$\_$ $

e$\_$r $-$

CC$\_$eta $\frac{\text{\$}}{k}W$

e$\_$eta $-$

n

marr

"compression ratio"

"isentropic efficiency of

"Price per unit volume of fuel"

"Density of light diesel Table A$-27$ Cengel$*+++"$

"Lower heating value Table A$-27$ Cengel$*+++"$

"Operating time each year based on owner profile"

"Temperature of air before compression"

"Pressure of air before compression"

"Average engine speed"

"Displacement volume of engine"

"Cost coefficient for initial cost as a function of compression ratio from parameter opt."

"Empirical exponent for initial cost as a function of compression ratio from param. opt."

"Cost coefficient for initial cost as a function of isentropic efficiency from param. opt."

"Empirical exponent for initial cost as a function of isentropic eff. from param. opt."

"Life of engine"

"Minimal acceptable rate of return"