$5($d$)\_$#$1$: A Carnot vapor refrigeration cycle has Refrigerant $134$a entering the condenser as

saturated vapor at $100$ lbf$/$in$2$ and leaving as saturated liquid at the same pressure. The

evaporator pressure is $20$ lbf$/$in$2.$ The mass flow rate of refrigerant is $12$ lb$/$min$.$ Determine

a$)$ the work input to the compressor and developed by the turbine, both in Btu$/$min$.$

b$)$ the coefficient of performance. Ans: $(5\mathrm{.}6)$

c$)$ draw the cycle on a T$-$s diagram