Page 53 - Designing for Zero Carbon-Volume 2_Case Studies of All-Electric Multifamily Residential Buildings

ROSECRANS PLACE
CASE STUDY NO. 2
Design Analysis: Optimizing Zero-Carbon Design
Design Analysis: Embodied Carbon
An embodied carbon analysis was not undertaken. There would have been no practical advan- tage given the nature of the construction, which was all Type-V wood-frame.
Design Analysis: Energy Modeling and Operational Carbon
Energy modeling was undertaken as part of the Title-24 compliance documentation using the California-approved Energy Pro software (Version 7.2). The total annual energy use for each type of unit plan was calculated and Title-24 compliance was confirmed.
In order to assess the expected overall performance of the entire multifamily portion of the proj- ect (the standard attached townhouses and the live/work condominiums), the monthly and an- nual energy use of the individual multifamily units were added together to obtain a project-wide total. This monthly- and annually-modeled energy use is shown in the chart below. The energy use totals do not include the offset provided by the solar PV systems; they represent a measure of the energy efficiency of the buildings alone. Totals by type of load were not calculated, so a breakdown of the modeled energy use for heating/cooling, lighting, plug load and DHW is not available.
Modeled Monthly Energy Use (EnergyPro v7.2 Software)
400,389 kWh/year Modeled EUI = 10.88
Designing for Zero Carbon: Volume 2
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