Presentation on theme: "Performance Evaluation of an Installed Insulated Tension System M.J. Augustyniak, T.D. McCoy, T.M. Connell and S. Gellin."— Presentation transcript:
Performance Evaluation of an Installed Insulated Tension System M.J. Augustyniak, T.D. McCoy, T.M. Connell and S. Gellin
Dedmon Center, Radford University, Radford, VA USA Original Construction Built 1987 Air supported fabric with liner Fabric coverage: Gym – 4800 m 2 Pool – 560 m 2
Problems High energy consumption (air conditioning, supporting the air supported roof) Poor acoustics in the gym; could not use as a multi-use facility Condensation on the pool liner, causing dirt stains
New Build Requirements State code required a level of insulation not met by old system (R = 12) (0.47 W/m 2 -°K) New insulated system will maintain the natural daylight In gym, air supported system replaced by a truss support structure with the insulated fabric system as cladding; flexibility required to protect roof supports
Properties of New Insulated System Top layer: PTFE coated fiberglass Bottom layer (liner): PTFE coated fiberglass; special vapor barrier for pool
Properties of New Insulated System (continued) Inside: Aerogel blanket - Lightest solid material on earth - Hydrophobic - Lowest thermal conductivity of any solid - Translucent - Stable properties - Made from silica - Re-usable
Conclusions Energy costs significantly reduced Lighting more than adequate Acoustic performance in gym allows for multi-function usage Fabric can now compete with conventional roofing systems in cold weather climates!