Wal-Mart Stores announced the opening of its second generation of High-Efficiency stores (HE.2) that will use 25% less energy than the baseline Wal-Mart Supercenter. The first store will open in Romeoville, IL, U.S. on January 23. In addition to saving energy, the new stores will significantly reduce greenhouse gas emissions by lowering refrigerant by 90%.
The improvement in energy efficiency comes from a new secondary refrigeration loop combined with an advanced water-source heating, cooling, and refrigeration system. The technology was tested in Wal-Mart's Experimental Stores and uses a non-refrigerant-based solution to cool refrigerator and freezer cases, resulting in a 90% reduction in refrigerant. The HE.2 stores represent the first time secondary loop technology has been paired with a water-source heating, cooling, and refrigeration system in the United States.