76
Details:
1
st
Step:
To obtain the Total capacity and Sensible capacity for
(a) Indoor Condition: 24°C DB, 15°C WB
Outdoor Condition: 35°C DB
Total capacity, TC
⇒
x
1
= 2.558kW (Same as Total capacity at 20°C Indoor DB / 15°C Indoor WB & 35°C Outdoor WB)*
Sensible capacity, SC
Extrapolation Method:
⇒
⇒ y
1
= 1.990kW
(b) Indoor Condition: 24°C DB, 15°C WB
Outdoor Condition: 40°C DB
Total capacity, TC
⇒
x
2
= 2.355kW (Same as Total capacity at 20°C Indoor DB / 15°C Indoor WB & 40°C Outdoor WB)*
Sensible capacity, SC
Extrapolation Method:
⇒
⇒ y
2
= 1.802kW
* 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
17°C - 15°C
=
1.794kW - y
1
17°C - 16°C 1.794kW - 1.892kW
17°C - 15°C
=
1.653kW - y
2
17°C - 16°C 1.653kW - 1.728kW
Outdoor DB ° C
Indoor DB Indoor WB 35
° C ° C TC (kW) SC (kW)
15 x
1
y
1
24 16 2.623 1.892
17 2.687 1.794
Outdoor DB ° C
Indoor DB Indoor WB 40
° C ° C TC (kW) SC (kW)
15 x
2
y
2
24 16 2.429 1.728
17 2.502 1.653
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