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Project Launch: 10/01/2020

Partner: DNV

This field evaluation intended to assess the potential savings of a refrigeration technology that may benefit ComEd commercial customers.


Some refrigeration systems experience a reduction in efficiency due to refrigerant material boiling before entering the evaporator (“flash gas”). Flash gas condensers use a phase change material to remove heat absorbed by refrigerant when forced through the thermal expansion valve before entering the evaporator, keeping the refrigerant in liquid form. This reduces the energy required to cycle the refrigeration system and stabilizes the refrigeration cycle.

The project team attempted to evaluate the energy savings of installing flash gas condensers into the walk-in coolers and freezers of commercial customers in the ComEd service territory.

Results and Outcomes

The project team encountered difficulties in customer recruitment for field evaluation of the flash gas condensers and were ultimately unable to complete any installation and monitoring. Barriers to recruitment included business operations changes resulting from COVID-19, the adoption of alternative technologies overlapping with the savings potential of flash gas condensers and system incompatibility. The Emerging Technologies Team will continue to monitor the potential of this measure for future pilot evaluation.