Now that the economizer cooling season is in full swing, it would probably be worthwhile to review some common economizer design and operational issues prior to getting into the performance and cost savings analysis of economizer systems this year.
Probably the biggest challenge in implementing a waterside economizer system is accomplishing the goal of a seamless transition into and out of the economizer operational mode. In most applications today, especially where data centers and other sensitive loads are involved, this changeover needs to occur with little or no interruption of chilled water supply to the building.