Operation Manual

77
2
nd
Step:
To obtain the Total capacity and Sensible capacity for
(a) Indoor Condition: 23°C DB, 15°C WB
Outdoor Condition: 35°C DB
Total capacity, TC
⇒
x
3
= 2.558kW (Same as Total capacity at 20°C Indoor DB / 15°C Indoor WB & 35°C Outdoor WB)*
Sensible capacity, SC
Interpolation Method:
⇒
⇒ y
3
= 1.844kW
(b) Indoor Condition: 23°C DB, 15°C WB
Outdoor Condition: 40°C DB
Total capacity, TC
⇒
x
4
= 2.355kW (Same as Total capacity at 20°C Indoor DB / 15°C Indoor WB & 40°C Outdoor WB)*
Sensible capacity, SC
Interpolation Method:
⇒
⇒ y
4
= 1.655kW
* This is due to 2 different conditions with same WB temperature will have the same level of enthalpy. For
more details, please refer to psychrometrics chart
24°C - 20°C
=
1.990kW - 1.403kW
24°C - 23°C 1.990kW - y
3
24°C - 20°C
=
1.802kW - 1.215kW
24°C - 23°C 1.802kW - y
4
Outdoor DB ° C
Indoor DB Indoor WB 35
° C ° C TC (kW) SC (kW)
20 15 2.558 1.403
23 15 x
3
y
3
24 15 2.558 1.990
Outdoor DB ° C
Indoor DB Indoor WB 40
° C ° C TC (kW) SC (kW)
20 15 2.355 1.215
23 15 x
4
y
4
24 15 2.355 1.802