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Comparing New Building Pre-Construction and Post Occupancy Energy Models with Actual Performance

Comparing New Building Pre-Construction and Post Occupancy Energy Models with Actual Performance. 2014 CA Higher Education Sustainability Conference – Session 47 June 18, 2014 Gerry Hamilton. How Energy Models are Staged. Utilize Building Energy Models Economic Model Final Design Model

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Comparing New Building Pre-Construction and Post Occupancy Energy Models with Actual Performance

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  1. Comparing New Building Pre-Construction and Post Occupancy Energy Models with Actual Performance 2014 CA Higher Education Sustainability Conference – Session 47 June 18, 2014 Gerry Hamilton

  2. How Energy Models are Staged • Utilize Building Energy Models • Economic Model • Final Design Model • Evaluation Model Applied at different stages of the project. Turnover & Operation Permitting Programming DDs SDs CDs

  3. Recently Completed “High Performance” Buildings Lokey Stem Cell Research Building • Large Wet Lab Knight Management Center • Multi building office / classroom facility William H. Neukom Building • Simple office building

  4. Lokey Stem Cell Research Building • Medical School lab/research building • Opened in Fall 2010 • 258,000 square feet • 380 VAV fumehoods • Zone level heating and cooling • Heat recovery on main air handler units

  5. Lokey Stem Cell Research Building – Data

  6. LokeyStem Cell Research Building - Analysis • Zone level heating + cooling is very effective • Heat recovery system is more effective than modeled for this 100% outside air AHU system. • The plug load for lab space used in the original load calculation is over estimated by a factor of three.

  7. Lokey – Benchmark Comparisons

  8. Knight Management Center • Stanford Graduate School of Business • Completed in 2011 • 387,510 square feet (eight buildings) • Includes: offices, classrooms, conference rooms, library, auditoria, and dining pavilion • LEEDTM Platinum • Extensive submetering

  9. Knight Management Center – Data

  10. Knight Management Center – Analysis • Design operating hours were greatly exceeded • Could see high nighttime plug and lighting loads thanks to submetering • Utilized temporary occupancy sensors to verify • (Need an industry metric to account for space utilization) • Heating load under-estimated in model • Found a few RCx type measures through post occupancy energy modeling effort • Review of global heating setpoints • Schedule of several AHUs

  11. Knight Center – Benchmark Comparisons EIA - US Energy Information Admin

  12. William H. Neukom Building • Law School office building • Completed in 2011 • 65,000 square feet • VAV Reheat • Operable windows

  13. Neukom Building – Data

  14. Neukom Building – Data Analysis • Model underestimates heating loads • Model missed some electric loads • Some outdoor lighting • More emergency lighting than expected (runs 24/7) • Power converter and battery backup for emergency lighting parasitic load

  15. Neukom Building – Benchmark Comparisons EIA - US Energy Information Admin

  16. Appendix

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