UTM

LIST

EN$.$ A

EN$.$

EN$.1$

Chat

DR$.1$

DR$.$

DR$.1$

Chat

SETK

Past

File C:$/$Users$/$User$/$Downloads$/$Past$\%20$Year$\%20$Chp$\%208\%20$Chart$\%202324-1\%20$till$\%202021-1.$pdf

Past Year Chp $8$ Chart $2324-1$ till $2021-1.$pdf

$\frac{2}{2}$

$214\%$

Question $3$ Set $1$

After an inspection by the Public Works Department on the efficiency of the new air conditioner purchased by Iskandar Puteri City Council, they recommended that the air conditioner is to keep the office at the recommended comfort level of $15C.$ For this purpose, atmospheric air fully saturated with water vapor at $31C$ is to be cooled in a condenser to $12C$ before it is reheated to its delivery office temperature of $15C.$ As an intern in the Iskandar Puteri City Council, you were asked by the Council Engineer to:

$($a$)$ Draw and completely label a process flow diagram of the system.

$($b$)$ Sketch the process on the psychrometric chart.

$($c$)$ Estimate the relative humidity of the air at $31C.$

$($d$)$ Estimate the relative humidity and web bulb temperature of the air at $15C.$

On the basis of $100$ kg of dry air;

$($e$)$ Estimate the amount of liquid water $(kg)$ that leaves the condenser

$($f$)$ Estimate the cooling requirement $($ kJ $)$ in the condenser.

$($g$)$ Estimate the heat transfer $($ KJ $)$ in the heater.

UTM

LIST

EN$.$

EN$.1$

Chat

DR$.$

DR$.$

DR$.1$

Chat

SETK

Past

File

C:$/$Users$/$User$/$Downloads$/$Past$\%20$Year$\%20$Chp$\%208\%20$Chart$\%202324-1\%20$till$\%202021-1.$pdf

Past Year Chp $8$ Chart $2324-1$ till $2021-1.$pdf

Question $3$ Set $1$

After an inspection by the Public Works Department on the efficiency of the new air conditioner purchased by Iskandar Puteri City Council, they recommended that the air conditioner is to keep the office at the recommended comfort level of $15C.$ For this purpose, atmospheric air fully saturated with water vapor at $31C$ is to be cooled in a condenser to $12C$ before it is reheated to its delivery office temperature of $15C.$ As an intern in the Iskandar Puteri City Council, you were asked by the Council Engineer to:

$($a$)$ Draw and completely label a process flow diagram of the system.

$($b$)$ Sketch the process on the psychrometric chart.

$($c$)$ Estimate the relative humidity of the air at $31C.$

$($d$)$ Estimate the relative humidity and web bulb temperature of the air at $15C.$

On the basis of $100$ kg of dry air;

$($e$)$ Estimate the amount of liquid water $($ kg $)$ that leaves the condenser

$($f$)$ Estimate the cooling requirement $($ kJ $)$ in the condenser.

$($g$)$ Estimate the heat transfer $($ kJ $)$ in the heater.