Problem $4$: $(30$ Marks$)$ An ideal Diesel cycle has a maximun cyele temperature of $2000C.$ The state of the air at the begimning of the compressiont is $95$ kPa and $15C.$ This cyele is cexcuted in a four$-$stroke, eight$-$cylinder engine with a cylinder bore of $10$ cm and a piston stroke of $12$ cm $.$ The engine is operated at $1600$ rpm $.$ Use constant specific heat at room temperature.

k$.$ Draw the Diesel cycle on a $PV$ diagram such that the start of the compression process is called state $1$ and $s0on.(2$ Marks$)$

The properties of air at room temperature from Table A$-2$a$.(2$ Marks$)$

m $.$ Total volume of the air corresponding to the $8-$cylinder engine. $(5$ Marks$)$

n$.$ The mass of the air in the engine. Ans. $0,008665kg(5$ Marks$)$

o$.$ The compression ratio if the rainimam volume enclosed in the cylinder is $5$ percent of the maximum cylinder volume. $(3$ Marks$)$

P$.$ The temperature at the end of the compression process. $(3$ Marks$)$

q$.$ The amounts of hat added $(2$ Mark$)$

r$.$ Thermal efficiency of the cycle. $(3$ Marks$)$ Ans! $63\mathrm{.}04\%$

The net work outpot? $(2$ Marlss$)$ Ans: $835\mathrm{.}28k\frac{J}{k}g$

t$.$ The power output. $(5$ Marks$)$ Ants: $96\mathrm{.}5$ kW