The holistic use of these integrated components into one retrofit system is designed to maximize electricity generation and minimize the cooling load of the building. In addition, the solar-thermal technology that is integrated into the retrofit cavity will optimize the energy generated for domestic hot water and space heating.
The project is expected to yield more than 750,000 KBtu of energy per year through savings from energy efficiency improvements to this building or harvested energy generated from solar-power systems on the roof. With the local utility costs taken into account, Goodfellow Air Force Base is estimating a savings of $11,750 per year on this building thanks to the retrofit roof.
With the retrofitted integrated metal roof system in place, the surface of the roof is now being used to capture rainwater in an above-ground cistern with a 10,000 gallon capacity. It is estimated that a typical 2-inch rainfall in the San Angelo region will generate 6,500 gallons of rainwater being captured from one side of the roof. The rainwater will be used for irrigation purposes on the base. Estimates suggest 131,000 gallons of potable water per year will be saved from being used for irrigation.
The Data
With the full installation and commissioning now complete, the plan is to have ORNL continue monitoring data during the next 12 months. Data will be taken on:
- temperatures
- heat transfer
- energy output from the photovoltaics
- energy consumed by the building
- water usage
The ESTCP, DoD and project team are confident this integrated retrofit roof system will perform as predicted and allow for the technology to be transferred throughout DoD, as well as to other federal agencies and ultimately into the commercial building sector.
Photos: PARAMOUNT METAL SYSTEMS, COURTESY OF GOODFELLOW AIR FORCE BASE
Retrofit Team & Materials
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These core team members have been tireless in their time and talent toward the three-year grant process and attainment of the grant itself. The significance of the ESTCP grant award is there is no metal roof assembly in demonstration anywhere that will have the impact of what has been installed at Goodfellow Air Force Base, San Angelo, Texas.
- Paramount Metal Systems: Little Rock, Ark., www.paramountmetalsystems.com
David Dodge, president, and Jeff Slagle, project manager, made the installation of all components a smooth process through excellent cooperation with Air Force base personnel. - Pfister Energy: Hawthorne, N.J., www.pfisterenergy.com
William Poleatewich, director of new technologies, engineered, provided and oversaw the installation of the solar power, solar water and rainwater catchment systems that drive the heart of the energy and water savings. (The rainwater catchment system was provided by Texas Rainwater Catchment, San Antonio, catchtexasrain.com.) - Roof Hugger: Odessa, Fla., www.roofhugger.com
Mark James, vice president, and Dale Nelson, president, provided expertise in preparing the grant proposal, as well as engineered and manufactured the roof sub-purlins that make the metal-over-metal retrofit envelope possible. - Dow Building Solutions: Midland, Mich., www.dowbuildingsolutions.com
Tom Evans, regional sales manager, Bryan Mallon, national account manager, and Steve Libby, sales representative, provided THERMAX insulation for above and below roof purlins, as well as provided expertise about thermal issues. - Metal Construction Association: Glenview, Ill., www.metalconstruction.org
Scott Kriner, technical director, provided expertise in preparing the grant proposal and in reviewing the testing program to ensure authenticity. - Robert Scichili Associates: Richardson, Texas
Robert Scichili, president, provided expertise in writing the grant proposal and testing to be done. He acts as the principal investigator for the project, the grant team and ESTCP.