75
Performance Data
ACK-E-2009
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
Indoor DB
˚
C
Indoor WB
˚
C
Outdoor DB,
˚
C
35
TC (kW)
SC (kW)
........
........
24
15
...........................................
x
1
y
1
16
5.419
3.94
17
5.495
3.71
Total capacity, TC
⇒
x
1
= 5.343kW
(Same as Total capacity at 20°C Indoor DB / 15°C Indoor WB & 35°C Outdoor WB)
*
Sensible capacity, SC
Extrapolation Method:
⇒
17º C – 15º C
=
3.71kW – y
1
17º C – 16º C
3.71kW – 3.94kW
⇒
y
1
= 4.17kW
(b) Indoor Condition:
24°C DB, 15°C WB
Outdoor Condition:
40°C DB
Indoor DB
˚
C
Indoor WB
˚
C
Outdoor DB,
˚
C
40
TC (kW)
SC (kW)
........
........
24
15
...........................................
x
2
y
2
16
4.944
3.592
17
5.06
3.463
Total capacity, TC
⇒
x
2
= 4.828kW
(Same as Total capacity at 20°C Indoor DB / 15°C Indoor WB & 40°C Outdoor WB)
*
Sensible capacity, SC
Extrapolation Method:
⇒
17º C – 15º C
=
3.463kW – y
2
17º C – 16º C
3.463kW – 3.592kW
⇒
y
2
= 3.721kW
*
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 75
08_Performance Data_A.indd 75
4/6/2009 11:14:02 AM
4/6/2009 11:14:02 AM
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