HVAC Water Systems: Dual Temperature Chilled Water Loops


Chiller efficiency is a function of the chilled water supply temperature. All other things equal, higher chilled water temperatures result in improved chiller efficiency. For example, by dedicating a chiller in a dual chiller plant to provide chilled water at 55°F, 20 to 40% of chiller energy and peak power can be saved when compared to both chillers operating at 42°F.