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