Besides implementing LLH systems, another way to save energy is to implement new and advanced control strategies. Following are five strategies that are delivering results for industrial process cooling operations:
- Fan pressure optimization indicates through a communication
direct digital control/VAV system (the most static-demanding box) and uses its
position to reset static pressure to the lowest possible level. This action
reduces fan energy consumption by 30 to 50 percent, diminishes VAV box noise
due to less static pressure in the duct system, and reduces duct and VAV box
leakage.
- Ventilation reset control strategies like demand control ventilation
and the “Z factor” (a calculated ventilation target based on plant occupancy)
control the “right” amount of ventilation on a real-time basis to minimize or
eliminate excess, expensive-to-treat outside air.
- Chiller/tower optimization is achievable with plant automation
systems, which can calculate, on a real-time basis, the optimum balance between
the chiller, the tower and the condenser water pumps. These programs can be
used on both new construction and older installations.
- Auto-commissioning/auto-calibration can be performed using plant
automation systems to provide information for each zone, including the zone
setpoint and actual temperature, any problems experienced with the VAV box (via
an alarm), and the CFM being delivered.
- Virtual graphics help ensure that plant systems are easy to understand and operate. Graphics that look the same on the screen as they do in real life speed problem diagnosis and solutions.
