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nd
2
Step:
To obtain the Total capacity and Sensible capacity for
(a) Indoor Condition:
23°C
Outdoor Condition: 35°C DB
Indoor DB
Indoor WB
°C
°C
20
15
23
15
24
15
Total capacity, TC
⇒
x = 2.506kW (Same as Total capacity at 20°C Indoor DB / 15°C Indoor WB & 35°C Outdoor WB)*
3
Sensible capacity, SC
Interpolation Method:
°
−
°
24
C
20
C
. 1
931
=
⇒
°
°
−
24
C
23
C
⇒
y = 1.789kW
3
(b) Indoor Condition:
23°C
Outdoor Condition: 40°C DB
Indoor DB
Indoor WB
°C
°C
20
15
23
15
24
15
Total capacity, TC
⇒
x = 2.311kW (Same as Total capacity at 20°C Indoor DB / 15°C Indoor WB & 40°C Outdoor WB)*
4
Sensible capacity, SC
Interpolation Method:
°
−
°
24
C
20
C
. 1
773
=
⇒
°
°
−
24
C
23
C
⇒
y = 1.631kW
4
* 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
DB, 15°C WB
−
kW
1.363kW
−
. 1
931
kW
y
3
DB, 15°C WB
−
kW
1.205kW
−
. 1
773
kW
y
4
Outdoor DB, °C
35
TC (kW)
SC (kW)
2.506
1.363
x
y
3
3
2.506
1.931
Outdoor DB, °C
40
TC (kW)
SC (kW)
2.311
1.205
x
y
4
4
2.311
1.773
13
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