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Presentation to HOK

WHAT IS NET-ZERO? TYPES OF NET-ZERO BUILDINGS: site , source, cost, emissions ; off-site, off-grid. MYTH: net-zero buildings are ultra-high-tech and design is incredibly difficult. GETTING TO NET-ZERO. Presentation to HOK. NET ZERO ENERGY . SITE.

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Presentation to HOK

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  1. WHAT IS NET-ZERO? TYPESOF NET-ZERO BUILDINGS:site, source, cost, emissions; off-site, off-grid. MYTH: net-zero buildings are ultra-high-tech and design is incredibly difficult. GETTING TO NET-ZERO Presentation to HOK

  2. NET ZERO ENERGY . SITE Building produces as much energy as it uses over the course of a year – measured at the site boundary. property boundary utility energy consumed <or= renewable energy generated

  3. NET ZERO EMISSIONS . SITE Produces at least as much emissions-free renewable energy as it uses from emissions-producing energy sources. property boundary utility energy consumed <or= renewable energy generated

  4. HOW WE GO ABOUT IT Reduce your building energy demand as low as possible and supplement with renewable energy to achieve Net Zero. • “Low” is a level at which the payback on the investment in a renewable energy system is less than the life of the system – in other words, the renewable energy savings pay for the system before it fails. Pre-Design • Benchmarking • Set targets for energy usage index “EUI” – bldg gross sf / annual energy use • a good starting target for education facilities: 18 - 23 kBtu/ft2/yr (v. 75 kBtu/ft2/yr nat’lavg)

  5. INTEGRATED DESIGN PROCESS Team Work / Collaboration among Owner & Design Team • Build the team - building users & operations staff, architects, engineers • NZ is the goal from the very first design charette • Building Orientation & Form • Wall-to-area ratio • Window-to-wall ratio

  6. INTEGRATED DESIGN PROCESS • Team Work / Collaboration among Owner & Design Team • Envelope heat transmission values • Daylighting • MEP systems alternatives • Energy modeling + optimization • Estimate renewables

  7. REDUCE ENERGY USAGE • Be practical … There are plenty of opportunities andthere is no need to suffer • Select MEP systems that are readily maintainable andoffer high-efficiency operation • geothermal, water source heat pumps • condensing boilers / water heaters • LED lighting • Use emerging high-performance technologies that have matured • LED site lighting, downlights & grid troffers • Segregate loads to encourage monitoring and management of them • The Building Automation System should provide data that is useful to the operations staff • Net ZEB’s need occupants to become much more engaged with the operation of their buildings

  8. LEAVE NO STONE UNTURNED Evaluate Every System to Reduce Loads and Construction / Operating Costs • IT and LV systems • laptops in lieu of desktop computers • central printer stations • WAPs & VOIP phones • battery-powered wireless clock systems • Plug loads • copiers • Appliances • Energy Star Appliances

  9. REDUCE BUILDING ENERGY DEMAND Net ZEB’s need occupants to become much more engagedwith the operation of their buildings • Occupant education and engagement programs • Incentivize occupants to reduce energy use • Use the building as a teaching tool • Monitor plug loads separately to encourage monitoring and management by the owner

  10. MEP TO REDUCE ENERGY CONSUMPTION Food Service Demands • “no-grease” cooking • variable flow hood exhaust • DHW use • cooking equipment • water source coolers & freezers

  11. MEP TO REDUCE ENERGY CONSUMPTION Plumbing • Water efficient fixtures • Solar thermal, geothermal heat pump • Decentralized water heating – storage and instantaneous type • Drain water heat recovery

  12. MEP TO REDUCE ENERGY CONSUMPTION • Radiant heating/cooling • Geothermal, water source • Condensing boilers • Energy recovery • Demand controlled ventilation • “Green light” mode • Standing column well Mechanical Not necessarily new technologies, just more careful application.

  13. MEP TO REDUCE ENERGY CONSUMPTION Electrical • PV • LED fixtures • Occupancy controls • Daylight harvesting

  14. DESIGN THE BUILDING FOR PV If not now … later: Make sure there is sufficient … • roof and/or ground space to locate PV panels – don’t overlook shading • electrical room space for inverters • Discuss buy-back rates and incentives with your Utility provider

  15. TUNE YOUR ENGINES • Envelope commissioning • Systems Testing, Adjusting & Balancing • Monitoring & Verification • Initial commissioning – Seasonal • Post-occupancy evaluation • Continuous systems commissioning • Annual energy check-ups & reports It works in theory … but does it work? • Team Selection • Owner’s Requirements • Commissioning Plan • Basis of Design • Construction Checklist • Design Reviews • Field Coordination • Performance Testing • Field Verifications • Submittal Reviews • Owner Training • Warranty Verification • Systems Manual Delivery

  16. THANK YOU! QUESTIONS? 100 10th Street NE Suite 202 Charlottesville, VA 22902 434.296.2116 1611 Connecticut Avenue NW Suite 200 Washington, DC 20009 800.948.1748 1776 Peachtree Street Suite 418N Atlanta, GA 30309 • 800.948.1748 VCU Inger & Walter Rice Center for Environmental Life Sciences Education Building

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