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Educational Leadership Ctr - Energy Saving Systems

Challenge

The Cedar Rapids Community School District, which serves 16,000 students, was hard hit by historic flooding in Cedar Rapids in June 2008. Five school district support buildings were destroyed during the disaster. The decision was made that when rebuilding, all of the services and departments housed in those five buildings would be co-located into one new facility, the new Educational Leadership and Support (ELS) Center.

Solution

A combination of geothermal heat pumps with two 400’-450’ deep Silurian discharge & two reinjection water wells, LED lighting, triple glazed windows, spray foam envelope enclosure and commissioning helped achieved an approximately 50% energy savings over a ASHRAE 90.1-2007 baseline. Geothermal reinjection water is partially recycled to serve the new automated bus wash system. Dedicated outside air units (DOAU) with dual wheel energy recovery and desiccant dehumidification systems provide preconditioned outside air for air pressure control between the shops, maintenance and office spaces. The DOAU units also provide CO/NO2 exhaust mitigation coupled with gas detection systems serving the warehouse, shipping and transportation areas. A water-to-water heat pump plant provides for high efficiency heating water which can also provide chilled water to the make-up air units required for various shop. Other dedicated outside air units provide for desiccant dehumidification and carbon monoxide mitigation for the large warehouse storage spaces including shipping and receiving areas while maintaining constant, low humidity conditions. High pressure water humidification system provides for humidity control for the art gallery, wood shop, print shop and paper storage. Water-cooled and air-cooled computer room cooling systems serve the IT server room and art gallery for precise space environment control.

Impact

While working together to provide comfort and a high indoor air quality, these energy saving systems reduced the District’s electrical and natural gas costs by 50 percent over code based systems. This building has become an energy conservation teaching tool.
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