McQuay MWM009J

37
Performance Data MWM-J-2009
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
...........................................
2.368 1.181
23 15
x
3
y
3
24 15 2.368 1.814
Total capacity, TC
⇒ x
3
= 2.368kW (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
=
1.814kW – 1.181kW
24º C – 23º C 1.814kW – y
3
⇒ y
1
= 1.656kW
(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
...........................................
2.131 0.963
23 15
x
4
y
4
24 15 2.131 1.579
Total capacity, TC
⇒ x
4
= 2.131kW (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
=
1.597kW – 0.963kW
24º C – 23º C 1.597kW – y
4
⇒ y
2
= 1.597kW
* 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.indd 3708_Performance Data.indd 37 3/3/2009 10:32:58 AM3/3/2009 10:32:58 AM