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Over the years we have been very successful in lowering the demand aspect of the PECO bill in colleges
and schools.
When American College came to Madsen for help,
we installed the campus wide American Auto Matrix DDC control system to target the high cost of electricity. We have the PECO pulse from
the meter wired into the
AAM Sage- the "brain" of this system- to monitor the demand. When the
demand goes above a predetermined set point we have the Sage Programs shut down selected electrical loads for a short time then it will go after another load. Doing this on a daily basis keeps the PECO
demand in control and lowers the electric bill by thousands of
dollars each month. We have a control network wired to each of the
heating and cooling units in all the buildings from the Sage. |
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Another way we were able to reduce the demand is to make ICE during the night and store it in large
tanks behind the buildings on campus. We run the York Chillers at night at 26 degrees and run it through the
ICE Storage tanks making several tanks of ice. In the morning when the cooling is turned on in the building, we turn off the compressors.
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PECO gives a special rate for OFF PEAK
electric use and it includes Demand Free electric at night. Removing
the Demand from the day time meter readings (by shutting off AC) and
putting it on the very low charge night reading saves American
College thousands of dollars again in cooling their buildings.
Demand Control and Ice storage has worked over many years now to save this college
many dollars that can be used in building their services to their students.
Since we have a network extending around the campus and back to the main Maintenance building the staff is also able to maintain watch on the building temperatures from a PC. This enables the college to give their clients a monitored temperature space in which to learn. Tight time of day schedules on the used spaces also saves money because they are not heating or cooling classrooms when they are not being used. |
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