ZENN
iO
AVANCE Y TECNOLOGÍA
vwww.zennio.com
31
31
Example 3: disabled channel
While measuring the electric consumption of a certain device that remains always turned on
and that consumes 200 W constantly, we leave enabled the corresponding channel of KES
between 0:00h am and 11:00h am on Monday. Exactly when
it’s 11:00h am, we deactivate the
channel through the object “[Cx] Disable”. When it turns midnight, KES will consider that the
total consumption during the day has been 2.2 kWh (that is, 200 watts constantly during 11
hours, since there was no measuring between 11:00h am and midnight) and that the average
daily consumption has been 200 watts per hour (2.2 kWh / 11 hours).
Exactly after midnight, the channel is enabled again and remains this way indefinitely,
measuring a 200 Wh consumption every hour. When the week is over (after midnight from
Sunday to Monday) the earlier Monday will be considered as a regular day in order to
calculate the average weekly consumption per day. In other words:
-
Weekly consumption
= 2.2 kWh + (6 days x (0.2 kW x 24 hour)) = 31 kWh.
-
Average weekly consumption
= 31 kWh / 7 days = 4.43 kWh per day.
Let the device whose consumption we are measuring be now turned on only on Tuesday,
Thursday and Saturday and let the channel be always enabled. In that case, there will be a
consumption of 0 kWh on Monday, Wednesday, Friday and Sunday. The total consumption
for Tuesday, Thursday and Saturday will be (3 days x (0.2 kW x 24 hours)) = 14.4 kWh.
However, once the week is over, the average weekly consumption will be 14.4 kWh / 7 days =
2.06 kWh. The division is by 7 because the cannel stayed enabled during seven day forward
changes, even the days in which there was a consumption of exactly zero.
Example 4: disabled channel
Suppose the energy consumption of an office is going to be measured. Most of everyday
consumption takes place during the 8 working hours, and although there is not a consumption
of exactly 0 kWh during the rest of the day, it is not going to be measured. To achieve this, a
case similar to #2 in Example 2 must be considered. Enabling the channel only during 8 hours
a day will cause that any consumption made during the other 16 hours is discarded, and that
the average daily consumption is obtained dividing by 8 (not 24). Regarding weekly and
monthly values, only those days in which not only there was a null total consumption but also
the channel was detected disabled at the end of the day (midnight) will not be considered.
