San Diego Libraries Zero-Net Energy and Integrated Demand Side Management Project
December 23, 2021
Energy Research and Development (500)
Electric Program Investment Charge - EPIC
Kristin Larson, Christopher Vogel, John Woolsey, Sarah Bliss, Daniel Flores
The Center for Sustainable Energyin partnership with the California Energy Commission,City of San Diego,MazzettiInc., M+NLB Construction Services, San Diego Green Building Council and San Diego Gas&Electriccompleted a multiyear project to test, verify,and publicize the integration of energy efficiency, onsite renewable power and other demand-side resources to convert three public librariesto nearzero-net energybuildings.Energy conservation measuresimplemented includedlight-emitting diodelighting, lighting controls,plug load management devices,heating,ventilation,andairconditioningcontrols and whole-building automation platforms that measure demand trends to optimize equipment operations. The project also engaged and educated library staff, volunteers, and community members through interactive, in-library kiosks onzero-net energyandintegrated demand side managementstrategies, sustainable energy and associated environmental benefits, extending energy savings beyond the three project sites.To measure success, the project team conducted pre-and post-construction surveys of library staff and volunteers. The team also conductedninemonths ofpost-retrofit measurement and verificationwith athree-month projection to estimate annualpost-retrofit energy consumptiondue to COVID-19 shut downof the libraries.The project results indicated thatthe energy efficiency measures reduced electric consumption at the libraries from 13 to 30 percent.Photovoltaics wereinstalled at each of the librariesindependent of the grant. As a result, two of the librarieswere able to achieve near zero net energydue to combining the photovoltaics and energy efficiency measures.The project demonstrated ablue printto achievenear zero net energy forother City of San Diego municipal buildingsalong with the benefits and challenges of retrofitting existing buildings.