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Improving Performance in Portable Classrooms 30 July 2002 • 3:30-5:30

2002 State Energy Program/Rebuild America National Conference. Improving Performance in Portable Classrooms 30 July 2002 • 3:30-5:30. Stephanie Thomas, Florida Solar Energy Center A Research Institute of the University of Central Florida.

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Improving Performance in Portable Classrooms 30 July 2002 • 3:30-5:30

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  1. 2002 State Energy Program/Rebuild America National Conference Improving Performance in Portable Classrooms30 July 2002 • 3:30-5:30 Stephanie Thomas, Florida Solar Energy Center A Research Institute of the University of Central Florida High Performance Buildings

  2. FSEC PERCFlorida Solar Energy CenterPerformance Enhanced Relocatable Classrooms Who am I? Stephanie Thomas - Design Analyst, FSEC What do I do? Project Lead for PERC Why am I here? Introduce PERC Sponsors? National Association of State Energy Officials DOE Energy Smart Schools High Performance Buildings

  3. FSEC PERC Why PERC? • 36% of the nation’s schools use relocatables • Relocatables are plagued as energy hogs • Suspected source of health problems • Perceived as low quality learning environment • Constructed to the minimum standards High Performance Buildings

  4. FSEC PERC Why PERC? High Performance Buildings

  5. FSEC PERC Objectives Capistrano Unified School District, Orange County, CA. http://www.h-m-g.com/Daylighting/schoolc.pdf High Performance Buildings

  6. FSEC PERC Objectives Improve new classrooms at lowest cost • Enhance envelope & systems performance • Improve IAQ & thermal comfort • Increase energy efficiency • Lower maintenance • Improve academic performance levels (daylight) High Performance Buildings

  7. FSEC PERC Objectives Monitor side-by-side • Heating dominated climate – Cornwall District, NY • Hot, humid climate – Orange County, FL • Hot-dry climate – Arizona/New Mexico • Mixed climate – Oakdale, CA Provide data on the web High Performance Buildings

  8. FSEC PERC Premise How we got here High Performance Buildings

  9. FSEC PERC Premise Reports & other research • Evaluation of Energy Efficiency Improvements to Portable Classrooms in Florida • - Florida Solar Energy Center • Northwest Portable Classrooms Energy Data Study • -Washington State University Cooperative Extension Energy Program • High Performance Commercial Building Systems • – Lawrence Berkeley National Laboratory • Daylighting in Schools • – Heschong Mahone Group High Performance Buildings

  10. FSEC PERC Daylight in Schools • 2nd-5th grade students • 21,000 test scores assessed • Students progressed 20% faster on math tests • Students progressed 26% faster on reading tests • Students have 7-18% higher test scores • http://www.h-m-g.com/Daylighting/schoolc.pdf • Relocatables constituted 40% of the data set • (3 districts in CA, CO &WA) High Performance Buildings

  11. FSEC PERC Optimal Skylight Design High Performance Buildings

  12. 10’ 12’ FSEC PERC Optimal Skylight Design 4 Skylights High Performance Buildings

  13. FSEC PERC 10’ 8’ Optimal Skylight Design 6 Skylights High Performance Buildings

  14. FSEC PERC 10’ 6.5’ Optional Bathroom Optimal Skylight Design 8 Skylights High Performance Buildings

  15. FSEC PERC Optimal Skylight Design 4 Skylights 6 Skylights 8 Skylights High Performance Buildings

  16. FSEC PERC Optimal Skylight Design/Layout High Performance Buildings

  17. FSEC PERC Optimal Skylight Design/Layout High Performance Buildings

  18. FSEC PERC Optimal Skylight Design/Layout 36’-0” 2x4 Skylight 4x6 Welled Area @ Fin. Clg. 24’-0” Light Fixture Reflected Ceiling Plan High Performance Buildings

  19. FSEC PERC Optimal Skylight Design/Layout A-A Partial Section A-A Type IV (FL) High Performance Buildings

  20. FSEC PERC FL Specifications – Type IV FL PERC with integrated skylights High Performance Buildings

  21. FSEC PERC FL Specifications – Modifications Enhance envelope • Wall - Insulation from R-11 to R-15 • - Added 1” extruded polystyrene between siding & substrate • - Caulking wall plates & baseboards • Doors - Upgrade doors to min. R-12 insulated foam core High Performance Buildings

  22. FSEC PERC FL Specifications – Modifications Enhance envelope • Windows - Upgrade single pane, aluminum frame windows w/ double pane, low-e, argon fill, vinyl frame High Performance Buildings

  23. FSEC PERC FL Specifications – Modifications Enhance envelope • Roof - Added 6 skylights, on 6” wood curb U=0.54, SHGC = 67%, Tvis = 74% • - Added ¾” extruded polystyrene between EPDM & substrate • - Specify white EPDM in lieu of gray • - Insulation from R-19 to R-30 • Floor - Insulation from R-14 to R-21 High Performance Buildings

  24. FSEC PERC FL Specifications – Modifications Enhance systems performance • HVAC - Upgrade 3.5 ton A/C to 3 ton heat pump w/WERV (wall mount energy recovery ventilator) • - Upgrade SEER 10 to SEER 12 • - Add 1” R-6 duct board insulation to duct main • - Add commissioning requirement to ensure duct leakage not more than 5% at 50Pa • Controls - CS 2000 Energy monitor w/ manual override • - CO2 sensor/monitor for variable speed ventilation • - On site commissioning of controls (w/ energy managers) High Performance Buildings

  25. FSEC PERC FL Specifications – Modifications Enhance systems performance • Lighting - Reduce fixtures from 14 to 9 • - Replace T12 w/ T8, 3 step operation • - Increase CRI from 60 to 82 • - Integrated w/ skylight photo sensor & occupancy control • - Add louver system w/ manual override • - Commissioning requirement for controls • - Replace fluorescent w/ LED emergency light High Performance Buildings

  26. FSEC PERC FL Specifications – Modifications Improve IAQ & thermal comfort • Interior finish • - Upgrade 26 oz. roll carpet w/ no VOC, non- permeable backing carpet tile, 56% recycled • - Replace VCG w/ seamless, breathable, finished gypsum wall board • - Specify formaldehyde free batt insulation • - HVAC system & controls maintain thermal comfort Seamless, pre-finished gypsum board High Performance Buildings

  27. FSEC PERC FL Roof Construction Typical Assembly Add 1” extruded polystyrene between EPDM & DensDeck Insulation from R19 to R30 High Performance Buildings

  28. FSEC PERC FL Wall/Windows Typical Assembly Add 1” extruded polystyrene between DensGlas & siding Replace single pane windows w/ Solarban 60 High Performance Buildings

  29. FSEC PERC NY Specifications – Wood Cornwall Elementary School, Orange County (Typical 23’-4” x 68’) High Performance Buildings

  30. FSEC PERC NY Specifications – Wood Cornwall Elementary School PERC, Orange County ( w/ skylights) High Performance Buildings

  31. FSEC PERC NY Specifications – Modifications Enhance envelope • Wall - Insulation from R-11 to R-19 • Windows - Upgrade double pane, clear glass, aluminum frame windows w/ double pane, low-e, argon fill, vinyl frame • Floor - Insulation from R-11 to R-21 High Performance Buildings

  32. FSEC PERC NY Specifications – Modifications Enhance envelope • Roof - Insulation from R-19 to R-38 • - Add heel truss at wall bearing w/ air space between truss & substrate Transverse section of heel truss Spray foam insulation installation High Performance Buildings

  33. FSEC PERC NY Specifications – Modifications Enhance systems performance • HVAC - Upgrade 3 ton A/C w/ 15 kW heat strip to to 3 ton heat pump w/ WERV & 7 kW heat strip Energy Recovery Ventilator (ERV) Wall Mount HVAC High Performance Buildings

  34. FSEC PERC NY Specifications – Construction Typical Assembly Modify truss w/ min. 10” heel Replace batt insulation w/ spray foam @ roof deck (sealed attic) Replace gypsum ceiling w/ lay in tile ceiling @ 8’-6” High Performance Buildings

  35. FSEC PERC Energy Modeling High Performance Buildings

  36. FSEC PERC Energy Modeling High Performance Buildings

  37. FSEC PERC Energy Modeling High Performance Buildings

  38. FSEC PERC High Performance Buildings

  39. FSEC PERC High Performance Buildings

  40. FSEC PERC Status & Schedule • Florida – School determined, construction start TBD • New York – Construction start week of August 5 – Occupied August 20 • California – Construction start week of August 7 – Occupied September 1 (year round school) • Arizona – School not yet determined High Performance Buildings

  41. FSEC PERC Next Steps • Monitor & document construction • Highlight lessons learned • Commission HVAC, lighting & controls • Monitor performance • Administer questionnaire/interview staff High Performance Buildings

  42. FSEC PERC A room is not a room without natural light. Natural light gives the time of day and the mood of the seasons to enter. - Louis Kahn Yamato Colony Elementary School, CA www.sunoptics.com High Performance Buildings

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