$2\mathrm{.}4$ Technical Data

Air split type: $2\mathrm{.}5$ kW $($approx$.9,000$ BTU$)$

Compressor type: Rotary

Refrigerant: R$-22$

Evaporator ai flow rate: $450m3/$approx$.$

Fan coil air flow rate: $1,500m\frac{3}{h}r.$ approx.

Require power: $800$ W $($approx$.)$

Power supply: $220$ V $1$ Ph $50$ Hz $.$

Meosuring instruments:

Pressure gauges: $2$ each at compressor inlet and exit.

Temperature sensors: $5$ each at compressor inlet and exit, condenser exit,

after expansion valve, and air condition outlet air.

$2\mathrm{.}5$ Procedure

It was ensured that the electrical power was supplied to the apparatus.

The power supply switch wias turned on and the temperature remote

controller was set to a required room ai temperature, $16C($Winter$).$

The apparatus was let to run until the steady conditions were reached it took

a minimum of $2$ hours.

The high$-$side and low$-$side pressures and all the temperatures were then

recorded.

The process was repeated three times to make sure that all data collected

was the same.

$2\mathrm{.}6$ Experiment Results

$2\mathrm{.}6\mathrm{.}1$ Plot the experimental data on a p$-$h diagram $($of R $-22)$ to obtain the

refrigeration cycle.

$2\mathrm{.}6\mathrm{.}2$ From the p$-$h diagram, determine the enthalpy values and hence calculate:

$($a$)$ The refrigeration effect,

$($b$)$ The compressor work,

$($c$)$ The heat rejected at condenser, and

$($d$)$ The coefficient of gepformags