Question $4$

$(40$ marks$)$

A Camot power cycle is carried out by $1\mathrm{.}5$ kg of water. The water is heated during isothermal expansion from its starting state, where the pressure is $25$ bar and the quality is $23\%,$ to a saturated vapour. The vapour then does $290k\frac{J}{k}g$ of work and adiabatically expands to a pressure of $1\mathrm{.}5$ bar $.$

a$)$ Draw the cycle on P$-$v plot

$(4$ marks$)$

b$)$ Evaluate the heat and work for each process, in kJ

$(29$ marks$)$

Give your answers to $1$ decimal point.

c$)$ Determine the specific volumes at each state in$,\frac{m^3}{k}g$

$(5$ marks$)$

Give your answer to $4$ decimal points.

d$)$ Calculate the thermal efficiency $\%$

$(2$ marks$)$

Give your answer to the nearest whole number.

END OF EXAMINATION

CUniversity of Trinidad and Tobago

Puse $3$ of $9$