Detailed ProgramMarch 2011 to September 2011

goal – allow the winery to be self-sustainable in water & energy

Best Value CompetitionJune 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 AwardMarch 2012

Passive Designclerestory windows

and shading devices

Optimize Designreduce loadsinsulate well

daylightreduce infiltration

address thermal breakspassive cooling

WALL

Exterior Wall4 inch insulated wall panel over Snap-R 1 inch EPS

spacer over 10 inch girt (11in batt insulation) = R-55.7

ROOF

Roof6 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

InfiltrationOpaque Envelope

Windows

Infiltrationconstruct 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