关键词：新能源与高效节能；能源效率；能源节约；节能改造
摘 要：Multifamily deep energy retrofits (DERs) on relatively common building types are valuable research efforts for the U.S. Department of Energy's Building America Program. Such buildings represent great potential for energy savings, while providing valuable research-generated efficiency measures, cost-effectiveness metrics, and risk factor strategies to the multifamily housing industry. The Bay Ridge project comprises a base scope retrofit with a goal of achieving >30savings (relative to pre-retrofit), and a DER scope with a goal of 50savings (relative to pre-retrofit). The base scope was applied to the entire complex, except for one 12-unit building that underwent the DER scope. The design and construction phase of the Bay Ridge project is now complete, and this report summarizes the commissioning, short-term testing, and analysis that occurred before, during, and just after the actual retrofit. Findings from the implementation, commissioning, and short-term testing include air infiltration reductions of >60in the DER building; a savings to investment ratio of >1 from the hybrid heat pump system (relative to a high efficiency furnace), which also gives the resident an added incentive for energy savings; and duct leakage reductions of >60resulting from using an aerosolized duct sealing approach. Despite being a moderate rehab instead of a gut rehab, the Bay Ridge DER is currently projected to achieve energy savings .50compared to pre-retrofit levels, and the short-term testing supports this estimate. Long-term monitoring throughout 2012 will evaluate actual performance.