Data Center Energy Reduction: Free Cooling Heat Exchanger

Confidential Client
Project Type: Infrastructure/ Energy

For an international corporation based in NJ, EI recently performed an energy study to identify Energy Consumption Measure associated with a 2,000-ton Data Center and Office HVAC system. Our study evaluated several cooling options based on the introduction of plate/frame heat exchangers located between the existing condenser water system and the existing chilled water system. The heat exchanger will be capable of utilizing cold condenser water from the cooling towers as a way to produce chilled water without the need for mechanical cooling.

EI designed a “free cooling” heat exchanger option (as a waterside economizer) in a series arrangement to the existing electrical centrifugal chillers (which were upgraded with variable speed chillers as part of this project).  This series exchanger configuration (which can provide full cooling or pre-cooling to the chillers) increased the available hours of free cooling operation from 2,800 hours to approximately 5,000 hours.