• VRV Systems • Network Solution
41
•
10 Explanations of Power Proportional Distribution
10 - 2 Count Accuracy
10 - 2 - 1Cause of error
• REASON 2
When airconditioners of all the tenants cease operation, the power consumption which were preliminarily registered to all the airconditioners are being
added as described on the section 10.1.1,3).
(Example)
In case of 2 HP indoor unit (FXCQ50M8), it brings the watts for one month during the ceased operation = 20 Wh × 24 hours × 30 days = 14.4 kWh.
But for the different case that 10 HP outdoor unit (RXYQ10P) is connected to three indoor units with 100 % combination rate, it will show as follows;
쪨 ≠ Count conclusive total for indoor unit #1~#5 :
≠ Count conclusive total for indoor unit #6~#8 :
iPU counts the power consumption as the following conditions (1)~(6) for the standards. So, the gap to be raised from these conditions may cause the
error. Since these errors vary depending on the surrounded situations, the worst error value can’t be drawn out from the computing.
(1) Combination rate of indoor units connected to an outdoor unit (100%)
(2) Outdoor temperature (35°C)
(3) Indoor unit’s suction air temperature (19°C)
(4) Piping length (5 m)
(5) Level difference (0 m)
(6) Pipe diameter (ø22.2 )
Outdoor unit
RXYQ10
P
one unit
Crankcase heater’s
power consumption : 66 W
Monthly actual power consumption
of outdoor unit 47.52 kWh
(66
×
24
×
30 = 47520 Wh)
Indoor unit FXCQ50M8 The watts at the ceased
operation (registered data) 20 W
Monthly count value
43.2 kWh
(14.4
×
3 = 43.2 kWh)
W1
W2
To Next Page
Loading...
