Comparing New Building Pre-Construction and Post Occupancy Energy Models with Actual Performance
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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
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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 - PowerPoint PPT Presentation
Transcript of 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 Performance2014 CA Higher Education Sustainability Conference – Session 47June 18, 2014Gerry Hamilton
How Energy Models are Staged
■ Utilize Building Energy Models■ Economic Model■ Final Design Model■ Evaluation Model
Applied at different stages of the project.
PermittingCDsProgramming SDs DDsTurnover & Operation
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
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
Lokey Stem Cell Research Building – Data
Lokey Stem 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.
Lokey – Benchmark Comparisons
Lokey/ Sim1 Nano Science Gilbert Labs 21 Average CCSR Beckman -
50,000
100,000
150,000
200,000
250,000
300,000
350,000
400,000
450,000 Stanford LAB Building EUI Comparison
SteamElectricityChilled Water
btu/
sqft/
yr
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
Knight Management Center – Data
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
Knight Center – Benchmark Comparisons
Neukom Peterson Lab HEC Knight Alumni EIA (median office)
Packard Gates -
20,000
40,000
60,000
80,000
100,000
120,000
140,000
160,000
180,000
200,000
Stanford Office and Light Duty Lab Building EUI Comparison
SteamElectricityChilled Water
btu/
sqft/
yr
EIA - US Energy Information Admin
William H. Neukom Building
■ Law School office building■ Completed in 2011■ 65,000 square feet■ VAV Reheat■ Operable windows
Neukom Building – Data
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
Neukom Building – Benchmark Comparisons
Neukom Peterson Lab HEC Knight Alumni EIA (median office)
Packard Gates -
20,000
40,000
60,000
80,000
100,000
120,000
140,000
160,000
180,000
200,000
Stanford Office and Light Duty Lab Building EUI Comparison
SteamElectricityChilled Water
btu/
sqft/
yr
EIA - US Energy Information Admin
Appendix
