Operation Manual

65
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
= 3.295kW (Same as Total capacity at 20°C Indoor DB / 15°C Indoor WB & 35°C Outdoor WB)*
Sensible capacity, SC
Interpolation Method:
⇒
⇒ y
3
= 2.233kW
(b) Indoor Condition: 23°C DB, 15°C WB
Outdoor Condition: 40°C DB
Total capacity, TC
⇒
x
4
= 2.995kW (Same as Total capacity at 20°C Indoor DB / 15°C Indoor WB & 40°C Outdoor WB)*
Sensible capacity, SC
Interpolation Method:
⇒
⇒ y
4
= 1.917kW
* 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
=
2.474kW - 1.510kW
24°C - 23°C 2.474kW - y
3
24°C - 20°C
=
2.158kW - 1.195kW
24°C - 23°C 2.158kW - y
4
Outdoor DB ° C
Indoor DB Indoor WB 35
° C ° C TC (kW) SC (kW)
20 15 3.295 1.510
23 15 x
3
y
3
24 15 3.295 2.474
Outdoor DB ° C
Indoor DB Indoor WB 40
° C ° C TC (kW) SC (kW)
20 15 2.995 1.195
23 15 x
4
y
4
24 15 2.995 2.158