Bay Ridge Gardens-Mixed-Humid Affordable Multifamily Housing Deep Energy Retrofit.

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 research program. Such buildings represent great potential for energy savings, and the analysis of such projects provides valuable findings on efficiency measures, cost-effectiveness metrics, and risk factor mitigation strategies. The Bay Ridge energy retrofit project comprised a base scope retrofit with a goal of achieving 30% savings (relative to pre-retrofit), and a DER scope with a goal of 50% savings (relative to pre-retrofit). The base scope has been applied to the entire complex except for one 12-unit building, which underwent the DER scope as well as energy monitoring for a one-year post-retrofit period. This report summarizes commissioning, short-term testing, utility bill data analysis, and results of on-site monitoring with a focus on the three-bedroom base scope and DER units. Findings from the implementation, commissioning, and short-term testing include air infiltration reductions of greater than 60% in the DER building; a hybrid heat pump system with a savings to investment ratio > 1 (relative to a high efficiency furnace) which also provides the resident with added incentive for energy savings; and duct leakage reductions of > 60% using an aerosolized duct sealing approach.