Besides implementing LLH systems, another way to save energy is to implement new and advanced control strategies. Here are five strategies that are delivering results for industrial process cooling operations.

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:

1. 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.
   
   
2. 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.
   
   
3. 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.
   
   
4. 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.
   
   
5. 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.

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