Transcritical Carbon Dioxide Performs Well in Supermarket Pilot
Valuable Lessons Learned in 13-Month Project
EDITOR’S NOTE: The following is excerpted from Case Study: Transcritical Carbon Dioxide Supermarket Refrigeration Systems, which was prepared by Navigant Consulting Inc. for the Better Buildings Alliance, Building Technologies Office, Office of Energy Efficiency and Renewable Energy, U.S. Department of Energy.
The DOE Better Buildings Alliance Refrigeration Team partnered with Hannaford Supermarkets over a period of one year to study the operation of Hannaford’s store in Turner, Maine, which features a transcritical carbon dioxide refrigeration system. This store was the first in the United States to utilize the technology. Compared to a nearly-identical store in the same climate zone using a traditional HFC system, the CO2 store showed a storewide reduction in climate impact of 15 percent over the study period while maintaining a similar energy use profile and the necessary levels of temperature control and reliability.