Initial assessments of economically attractive integrated building energy system solutions that can substantially reduce energy consumption in two medium-sized office buildings in the Philadelphia Navy Yard are presented. These sites were selected because they are the current and future headquarters of the DOE Energy Efficient Buildings Hub (EEB HUB). Energy efficient retrofit solutions involving integrated building systems with 40-60% site- and source-energy reduction potential relative to selected baseline energy consumption configurations are identified. The scope of retrofit options explored and integrated involve the building envelope, lighting and HVAC systems as well as the related control systems, providing a spectrum of retrofit options that range from low-/no-cost options to relatively higher capital cost options that involve significant capital upgrades and facility renovations. The energy savings estimates are based on combining multiple energy conservation measures (ECMs) that are tailored to the building use type and climate conditions. Energy performance (energy savings potential) and economic impact (NPV, IRR, and simple payback) of these retrofit system solution recommendations are assessed for two office buildings - Building 101 and Building 661, at the Philadelphia Navy Yard. A suite of retrofit system packages is presented for each building with a range of initial investments and economic returns to assist the investment decision making process, by stakeholders such as the building owner and operator. Results of the cost benefit analyses will be presented in light of incentives for high performance office buildings in the Philadelphia ten-county region.
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