Presented at the annual convention of the Sheet Metal and Air Conditioning National Association (www.smacna.org) in Maui, Hawaii, in October 2013. In this presentation, Jerry Yudelson discusses the business case for net zero energy buildings and demonstrates why they are going to be a big part of the green building future.
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Jerry Yudelson: The Business Case for Net Zero Energy Buildings
1. MAKING THE BUSINESS CASE:
NET-ZERO-ENERGY BUILDINGS
SMACNA National Convention
October 21, 2013 — Maui, Hawaii
Jerry Yudelson, PE, LEED Fellow
Yudelson Associates
Tucson, Arizona
Design Features 16,533-sq.ft. (one story, former retail store)79kVA of PV on adjacent parking structure Natural lighting on east and north facades, with horizontal shadingTarget EUI 25 kBtu/sq.ft./year Solatubes for interior light LEDs for exterior lighting 4 Evaporative cooling, “shower towers” made from 48” dia. Corrugated polyethylene storm pipe, each 28’ tall 87-foot-long, zinc-clad “solar chimney” Operable windows and roll-up doors 12 @ 8’-dia. Big Ass fans Vampire shut-off switch7PV has 140,000 kWh/year AC output Building dashboard system to engage occupants
Design Features Thermal chimney, 85’ long, black zinc16,533-sq.ft. (one story, former retail store) Natural lighting on east and north facades, with horizontal shading Solatubes for interior light LEDs for exterior lighting 4 Evaporative cooling, “shower towers” with 87-foot-long, zinc-clad “solar chimney Operable windows and roll-up doors 12 @ 8’-dia. Big Ass fans Vampire shut-off switch79 kW of PV, 140,000 kWh/year AC output Building dashboard system to engage occupants
Design Features Net zero was Mayor’s goal, introduced after budget was already set in stone175,500-sq.ft., $125 million (335,000-sq.ft. with structured parking) Built on a conventional budget (for this building type) – bond issue amount (balance 3 items: budget, quality, program all together with ‘net zero’) “Energy thermometer” presented at every project meeting when new issues came up; low lighting power density (LED task lights) LEED Platinum rating expected Radiant slab heating/cooling with chilled beam cooling (relatively few; dispatch center); improved comfort for stationary workers Downsized vents Space conditioning – find the right solution for each issue and to make them interactive 30-kW solar on building (30,000-sq.ft.); more at SLC Airport to meet Net Zero goal Four-story glass curtain wall with triple-pane glass
Design Features Net zero was Mayor’s goal, introduced after budget was already set in stone175,500-sq.ft., $125 million (335,000-sq.ft. with structured parking) Built on a conventional budget (for this building type) – bond issue amount (balance 3 items: budget, quality, program all together with ‘net zero’) “Energy thermometer” presented at every project meeting when new issues came up; low lighting power density (LED task lights) LEED Platinum rating expected Radiant slab heating/cooling with chilled beam cooling (relatively few; dispatch center); improved comfort for stationary workers Downsized vents Space conditioning – find the right solution for each issue and to make them interactive 30-kW solar on building (30,000-sq.ft.); more at SLC Airport to meet Net Zero goal Four-story glass curtain wall with triple-pane glass
50,000 SF16kBtu/SF/year goal6 stories30 kW PV systemOperable windowsLiving Building Challenge goals: Net Zero Energy/Net Zero Water
“What gets measured, gets managed”Without reports, we are flying blind/can’t fixWhy should governments put their faith in green building without performance reports?
Every building should be beautifulEvery building LEED PlatinumEvery building should aim at “BSAGs”Achieve measured 35 to 45 kBtu/sq.ft. (EUI) performanceDon’t settle for less!BE WILLING to SAY: If it doesn’t perform, it’s not a green building!
60 buildings total in the study, EUI up to 36, 20% were above 50,000 sq.ft.
Integrated Design Process Critical to SuccessStarted with the Procurement ProcessSet BSAGs – Big, Scary, Audacious Goals
Mission CriticalAttain Safe Work Performance Record/Safe Design PracticesLEED® Platinum CertificationENERGY STAR First “Plus”Highly Desirable Goals (first page)Up to 800 Staff Capacity25,000 BTU/sq.ft./year energy use (79 kWh/sq.m./annum)Architectural IntegrityHonor “Future Staff” NeedsMeasurable 50% Reduction In Energy Use From ASHRAE 90.1-2007Support Culture And Amenities
Highly Desirable (Continued)Expandable Building (To Add Another Wing)Ergonomic DesignFlexible WorkspaceSupport Future TechnologiesDocumentation to Produce a “How To” ManualPR Campaign Implemented in Real TimeAllow Secure Collaboration with OutsidersUse BIM (Building Information Modeling)Substantial Completion in 27 months
If Possible (Stretch Goals, 8 total))Net-Zero-Energy Design ApproachMost Energy-Efficient Building in the WorldLEED Platinum “Plus”Measurable >50% Reduction in Energy Use from ASHRAE 90.1-2007Visual Displays of Current Energy EfficiencySupport Public ToursAchieve National and Global Recognition/AwardsSupport retention of personnel
Every building should be beautifulEvery building LEED PlatinumEvery building should aim at “BSAGs”Achieve measured 35 to 45 kBtu/sq.ft. (EUI) performanceDon’t settle for less!BE WILLING to SAY: If it doesn’t perform, it’s not a green building!
If you want to score, run to where the ball is headed, not to where it is.Ask yourself and your clients: how green will the built environment be in 2015 to 2020?Non-performing green buildings will pay a penalty in that market!2010 FIFA World CupIf you want to score, run to where the ball is headed, not to where it is.Ask yourself and your clients: how green will the built environment be in 2015 to 2020?What will be the competing buildings over the next 5-10 years?Non-performing green buildings will pay a penalty in that market!
ARE YOU WILLING to SAY: If it doesn’t perform, it’s not a green building?