CO 2 supermarkets in the United States of America Data by state These figures are based on a 2012 survey of leading CO 2 system suppliers and commercial end-users. The data collected indudes both purchase orders for CO 2 systems and completed installations. Feel free to contact us to add your data to the map. Send an email to research@shecco.com Alaska Maine 1 washington 1 North Dakot 1 Minnesota 1 New York 4 2 1 3 2 3 Massachusetts 2012 Secondary installations Cascade installations Transcritical installations California 9 2 7 Utah 1 Colorado 1 nebraska 1 Kansas 1 Iowa 1 Missouri 3 Illinois Indianna Arkansas 2 2 2 1 Michigan 1 1 Tennesse 2 Ohio 1 2 Georgia 3 Connecticut 6 1 Pennsylvania Maryland 1 virginia 3 1 North Carolina 2 1 south carolina 1 2 42 2013 Secondary installations Cascade installations Texas 8 7 Mississippi 1 1 4 Florida 1 1 Transcritical installations
CO 2 supermarkets in the United States of America CO 2 technology was reintroduced in the Unites States in 2001, when laboratory testing of low-temperature CO 2 secondary systems was initiated. After extensive investigation of the system’s operation, display-case and unitcooler performance, and various piping configurations and control methods, the first US system was installed in mid-2006, in the 136,000 sq. ft. (12,635m 2 ) Sam’s Club (a division of Walmart) in Savannah, Georgia. By using this technology, the HFC charge was reduced by 34%. Then, in early 2008, the first low-temperature CO 2 cascade system was installed in a Price Chopper store in Saratoga, N.Y. Here, the CO 2 is condensed by a mediumtemperature refrigeration system using R-404A, which also chills propylene glycol for the relocated dairy and beverage departments. Since then, many more retailers have opted for CO 2 refrigeration. For example, Delhaize America has three stores which operate with low temperature CO 2 , or as a cascade, and one CO 2 transcritical project is planned in Maine for 2013. In 2009, Whole Foods completed their first CO 2 store project, a low temperature CO 2 secondary system. This was followed in 2010 by the company’s installation of two CO 2 cascade systems in California and Massachusetts. The company is now working on the design of their first CO 2 transcritical store. In the US the voluntary GreenChill Partnership, an initiative of the Environmental Protection Agency (EPA), is helping to spur the switch to natural refrigerants and CO 2 refrigeration. Aimed at reducing refrigerant emissions from supermarkets and decreasing the impact of supermarket refrigeration on the ozone layer and climate change, GreenChill represents more than 8000 supermarkets in all 50 states and Washington, DC. After starting with just 10 founding Partners, the GreenChill Partnership base has increased more than five-fold within four years. The Star Market store at Chestnut Hill in Newton, Massachusetts was one of the first supermarkets to receive the platinum-level Store Certification Award for advanced refrigeration technology that prevents harmful refrigerant emissions, the highest certification level that can be obtained from the Environmental Protection Agency's GreenChill Partnership. It received the award thanks to the installation of a glycol and CO 2 secondary refrigeration system, which reduced refrigerant charge by 85%. Other GreenChill platinum-level stores include the Fresh & Easy Neighborhood Market in Folsom California. The store received the award for the CO 2 refrigeration technology that uses medium-temperature glycol to condense low-temperature CO 2 . Fresh & Easy first installed a subcritical CO 2 system over two years ago. It also utilizes self-contained propane cases. SUPERVALU created the first US supermarket store with only natural refrigeration systems installed throughout. The store was named ‘Best of the Best’ at the GreenChill ‘2012 Environmental Achievement Awards’. The award was given to the Carpinteria store in California, which recently achieved Platinum-Level store certification as well. The store uses ammonia as the primary refrigerant in a system with 250 lbs (approximately 113 kg) of ammonia located in an outdoor enclosure. Here, CO 2 is condensed in a “combined” refrigeration system, in which one vessel contains liquid that is pumped to the low and medium temperature display cases and walk-in cabinets. The selfcontained merchandisers use propane as the refrigerant. In Hatfield, Pennsylvania, ShopRite, known in North America for its commitment to organic, local, and specialty foods, was awarded GreenChill Gold Certification, also for a CO 2 cascade system, installed with the aim of reinforcing its brand image, increasing its energy efficiency, and decreasing its environmental impact. The refrigeration systems use lower refrigerant charges, operate at lower pressures, and run more efficiently, utilizing 100% of the heat transfer surface. Another GreenChill Gold store is the Wegmans’ Woodmore store in Maryland, which also uses a CO 2 refrigeration system to cool the freezer cases, while glycol is used to cool the medium temperature dairy and meat cases R404A is used to chill the glycol. The success of this store led to the installation of a CO 2 refrigeration system in their Pottsville, Pennsylvania distribution center as well. 43