Post on 06-Aug-2020
transcript
Detailed Program March 2011 to September 2011
goal – allow the winery to be self-sustainable in water & energy
Best Value Competition June 2011 to January 2012
Advertisement & Prequalification • 17 Teams submit Prequalification Packets, June 2011 • Prequalification consists of required elements (pass/fail) and scoring (48 points possible) based on experience of team and individuals • 5 Teams interviewed, August 2011 Design Build Competition • 3 Teams selected to prepare designs and bid price • Two one-on-one sessions with each team, Nov & Dec 2011 Bids Received • Bid date, January 2012 • Detailed evaluation with points awarded • Best value price determined
Project Award March 2012
Passive Design clerestory windows
and shading devices
Optimize Design reduce loads insulate well
daylight reduce infiltration
address thermal breaks passive cooling
WALL
Exterior Wall 4 inch insulated wall panel over Snap-R 1 inch EPS
spacer over 10 inch girt (11in batt insulation) = R-55.7
ROOF
Roof 6 inch insulated roof panel over 12 inch metal girt
with batt insulation = R-70
specified double wall insulated dampers on all envelope penetrations
provided thermal and load bearing insulation
pads at structural steel connections
Thermal Bridging
Challenges: • maintain building interior temperature
between 50 and 80 degrees F WITHOUT the use of any active mechanical systems
• net zero site energy Software Selection: • IES vs Epro
Thermal / Energy Modeling
Where to Look?
Net Zero Energy Building Tip: Understand building physics
Infiltration Opaque Envelope
Windows
Infiltration construct an
airtight building
followed ASTM E1827-11 single point method for air tightness
looking for rate less than 0.1 cfm/sf
door blower test, identify leaks
with smoke guns
actual leakage 0.08 cfm/sf
once load reduced, use night flush through one fan with thermal storage in internal concrete walls and slab
Net Zero Energy Building Tip:
Understand micro climate
Mechanical Solution
Temperature Results
Temperature Results
Energy Results
• If 6 months results are extrapolated to one year, Total Building Energy consumption = 3,588 kWh
That is 1.44 kBtu/sq.ft-year • Modeled was 1.66kBtu/sq.ft-year
Energy Results
Net Zero Energy Building Tip: Model accurately