T$1=29\mathrm{.}6$F T$2=29\mathrm{.}4$F T$3=100\mathrm{.}3$F T$4=72\mathrm{.}4$F

P$1=26\mathrm{.}5$ psig P$2=26\mathrm{.}1$ psig P$3=76.2$ psig P$4=76\mathrm{.}4$ psig

$4=0\mathrm{.}48$ gpm Patm $=745\mathrm{.}6$ mmHg

$1.$ Calculate the enthalpy change at each point.

$2.$ Calculate the amount of heat transfer at the evaporator.

$3.$ Calculate the amount of heat transfer at the condenser.

$4.$ Calculate the amount of power input to the compressor.

$5.$ Calculate the ideal power input to a reversible compressor with the same feed and the

same pressure change.

$6.$ Calculate the efficiency of the compressor.

$7.$ Calculate the coefficient of performance of this refrigeration unit.

$1.$ Calculate the enthalpy change at each point.

$2.$ Calculate the amount of heat transfer at the evaporator.

$3.$ Calculate the amount of heat transfer at the condenser.

$4.$ Calculate the amount of power input to the compressor.

$5.$ Calculate the ideal power input to a reversible compressor with the same feed and the same pressure change.

$6.$ Calculate the efficiency of the compressor.

$7.$ Calculate the coefficient of performance of this refrigeration unit. Figure $1.$ The vapor$-$compression cycle for refrigeration.