The New School's University Center, a 370,000-square-foot mixed-use building in Manhattan, has made the American Institute of Architects' list of the Top 10 Most Sustainable Projects of 2015. The LEED Gold building, right, features a thermal energy storage system that makes ice at night, when electricity is cheaper, to help cool the structure during the day. University Center was designed by Skidmore, Owings & Merrill.
Federal Center South, a U.S. Army Corps of Engineers office building in Seattle, was honored as the AIA's Top 10 Plus winner. The building's HVAC system includes heat-recovery chillers that extract heat from a thermal storage tank to warm the building in the morning, when demand is high. A rooftop tank is filled with 2-foot-long panels containing phase change material that freezes and thaws at 55 degrees, serving as a battery for storing energy. Federal Center South was designed by ZGF Architects.