76
ACK-E-2009 Performance Data
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
Indoor DB˚C Indoor WB˚C
Outdoor DB, ˚C
35
TC (kW) SC (kW)
........
........
20 15
...........................................
5.343 2.925
23 15
x
3
y
3
24 15 5.343 4.17
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:
⇒
24º C – 20º C
=
4.17kW – 2.925kW
24º C – 23º C 4.17kW – y
3
⇒ y
1
= 3.859kW
(b) Indoor Condition: 23°C DB, 15°C WB
Outdoor Condition: 40°C DB
Indoor DB˚C Indoor WB˚C
Outdoor DB, ˚C
40
TC (kW) SC (kW)
........
........
20 15
...........................................
4.828 2.477
23 15
x
4
y
4
24 15 4.828 3.721
Total capacity, TC
⇒ x
4
= 4.828kW (Same as Total capacity at 20°C Indoor DB / 15°C Indoor WB & 40°C Outdoor WB)*
Sensible capacity, SC
Interpolation Method:
⇒
24º C – 20º C
=
3.721kW – 2.477kW
24º C – 23º C 3.721kW – y
4
⇒ y
2
= 3.41kW
* 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
08_Performance Data_A.indd 7608_Performance Data_A.indd 76 4/6/2009 11:14:02 AM4/6/2009 11:14:02 AM
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