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; and the Office of Energy Efficiency and Renewable Energy, U.S. Department of Energy (DOE).
The DOE Better Buildings Alliance’s 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 CO2 refrigeration system. This store was the first in the U.S. to utilize the technology. Compared to a nearly identical store in the same climate zone using a traditional hydrofluorocarbon (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. To read the entire study, visit http://bit.ly/TC-CO2-STUDY.