Dysart Unified School District: Kingswood Elementary School

Background

Dysart Unified School District has implemented an Energy Service Performance Contract (ESPC) at Kingswood Elementary to maximize opportunities for high efficiency technology upgrades and energy cost saving strategies. The project achieved an annual energy savings of 16% and a cost savings of $44,000.

Kingswood Elementary is one of 20 primary schools in the District with a student population of 738. Efficiency goals include the optimization of the school’s central plant which accounts for 100% of the energy use used to cool the campus. To help reduce the overall energy demand, a full-scale lighting retrofit was performed throughout the campus. Building energy performance models were used to profile the impact of a reduced lighting load on the cooling and heating needs of the building in order to right size replacement equipment. Efficiency measures were implemented in November 2011 and completed in January 2012.

Solutions

Kingswood also benefits from a district-wide effort to install solar photovoltaic electric energy systems at 20 schools and the District Office in 2013. The solar energy system is designed to serve a dual purpose – energy production and shade for playgrounds and parking. The solar generating capacity at Kingswood is 469 kW.

Energy efficiency measures implemented at Kingswood Elementary were financed using ARRA funds with matching ESCO funds and include:

Central chiller plant upgrades
- Installation of two water-cooled Trane RTHD-100 ton screw chillers
- Two chilled water pumps and associated Variable Frequency Drives (VFDs)
- Two cooling towers with VFDs on the fan motors
New lighting controls
Installation of new lighting fixtures and upgrades for existing fixtures with energy efficient products
Installation of solar hot water heaters

Solar hot water heaters were installed to take advantage of the solar resource capacity and further reduce annual energy costs. Goals of the solar energy system include reducing dependency on the electricity grid and providing educational benefits to student curriculums and the environment.

The solar products and service provider is working with Dysart USD on an energy buy back agreement for surplus energy generated at the site.

Dysart Unified School District: Kingswood Elementary School

ANNUAL ENERGY USE

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ANNUAL PLANT ELECTRICITY USE

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IN BUILDING ENERGY USE

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ACROSS NETWORK USE

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ANNUAL EMISSIONS

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Dysart Unified School District: Kingswood Elementary School

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