VAV calibrations during new fitout works - we would suggest to recalibrate each VAV
involved in new fitout works.
VAV 3 point calibration – we believe there is a potential to improve VAV control and comfort
conditions using 3 point calibration ( Calibrate zero, minimum and maximum air on each
VAV in the building)
Efficiency of the chilled water plant during low load
Start-up of AHUs – we would recommend to implement optimum start.
Optimal start is a control strategy that uses the BMS to determine the length of time
required to bring each zone from current temperature to the occupied setpoint
temperature. Then the system waits as long as possible before starting, so that the
temperature in each zone reaches occupied setpoint just in time for occupancy. This
strategy reduces the number of system operating hours and saves energy by avoiding the
need to maintain the indoor temperature at occupied setpoint even though the building is unoccupied.
Stopping of chilled water plant – we would recommend to implement optimum stop.
Optimal stop is a control strategy that uses the BMS to determine how early heating and
cooling can be shut off for each zone so that the indoor temperature drifts only a few
degrees from occupied setpoint before the end of scheduled occupancy. Only cooling and
heating will be shut off; the supply fan continues to operate and the outdoor air damper
remains open to continue ventilating the building. This strategy also reduces the number of
system operating hours, saving energy by allowing indoor temperatures to drift early.
Reduction of the total building electrical consumption is at 23.2% = 275MWh=$55K (Based
on $200/MWh) since the beginning of the platinum contract (1
Savings in February 2016 is 0.2% compared to February 2015
st October 2014).
