PV INTEGRATION INTO CURTAIN WALL TECHNOLOGY
Last Updated: Jun 24, 2011
American Institute of Architects, LOS ANGELES CHAPTER
Building Enclosure Council June 16, 2011
Nick Bagatelos President, Focus Materials 310.962.4087 firstname.lastname@example.org
Background My Path To Net Zero Net Zero Manufacturing Facility BiPV PRESENTATION OVERVIEW
Paradigm Shift Strategy for Net Zero Multi-Trade Solutions BiPV Rooftops and Curtain Walls Solar Panel Options BiPV Options Accessories Specifications Today’s Options Performance of Rooftop vs Vertical Wall Cost of Vision vs. Spandrel Government Incentives and Rebates
THE PARADIGM SHIFT Previously SHGC of the glass and sunscreen devices U-Value of the glass and framing system Now Energy generation Future Incorporation of Smart Walls into building information system Hot water Heat exchange
STRATEGY FOR A NET ZERO BUILDING Significant Energy Reduction (60%) Early planning High efficiency HVAC systems Extra insulation Day-lighting Energy efficient lighting and controls Energy production Energy storage
*Achieving the final 40% is a challenge!
Requirements for Net Zero Multi-trade solutions that incorporate new technologies.
MULTI-TRADE SOLUTIONS Growing Trend in Multi-Trade Solutions
Photovoltaic engineering and design DC electrical engineering and design Structural curtain wall engineering and design Manufacture Photovoltaic curtain walls and rain screens Installation and final commissioning for the system
Hot water from the exterior envelope Captured warm air from exterior envelope LED lights powered by PV on sunscreens Day-lighting technology included in vision areas Building controls with smart envelopes, operable windows, sunshades and smart glass DC lighting solutions to eliminate the use of inverters
BiPV ROOFTOP AND VERTICAL ARRAYS
SOLAR PANEL OPTIONS Utility Grade Panels Mono-crystalline Poly-crystalline Thin film Solyndra
Specialty Panels Transparent photovoltaic panels Pythagoras MONO & POLY CRYSTALLINE PANELS Mono-Crystalline Original Solar Technology Black with White Diamonds Multiple Standard sizes Highest Performing (14%) Silicone wafers mounted onto 1/8” glass with aluminum frames.
Poly-Crystalline Blue square pattern Multiple Standard sizes Second generation technology. Medium Performance (12%) Silicone wafers mounted onto 1/8” glass with aluminum frames.
THIN FILM FLAT PANELS Thin Film Panels Latest solar technology Black to dark bronze Standard size – 24” x 48” Medium performing (10 - 12%) Vacuum deposited ionic metal onto glass. (Similar to Viracon)
Abound Solar (US) Sulphurcell (DE)
CRYSTALLINE vs THIN FILM PANELS SOLYNDRA PANELS Solyndra Latest solar technology Black to dark bronze Standard size – 43” x 90” Medium performing (10 - 12%) Vacuum deposited ionic metal onto glass tubes
TRANSPARENT PANELS BiPV Glass over Glass Black with clear spacing Flexible standard glass sizes Uses Mono-Crystalline technology Performance LOW Silicone wafers laminated to between two sheets of glass
PYTHAGORAS Possible future – transparent photovoltaic glass Transparent Flexible size Next generation technology Extremely high performing (20%+) Embedded optical system Extremely expensive
BiPV VERTICAL APPLICATIONS
BiPV WALL POSSIBILITIES BiPV Curtainwall Produces energy Waterproof Multiple technologies UL tested Looks beautiful Cost effective
BiPV WALL POSSIBILITIES BiPV Rainscreen Produces energy Thin film technology Install onto existing buildings Alternative to composite panels UL tested Looks beautiful Cost effective
BiPV WALL POSSIBILITIES BiPV Sunscreens Produces energy Improve SHGC Multiple Technologies Install on existing buildings UL Tested Looks Beautiful Cost Effective Thin Film Solyndra Crystalline
BiPV WALL POSSIBILITIES BiPV Curtain Wall Retrofit Produces energy Improves SHGC Thin film technology Install onto any existing curtain wall system UL tested Looks beautiful Very cost effective
UTILITY GRADE ACCESSORIES Wiring: Prefabricated Wiring Harnesses
UTILITY GRADE ACCESSORIES Inverter Technology: Adopt Micro-Inverters
UTILITY GRADE ACCESSORIES Efficiency: Power Conditioning
PHOTO SPECIFICATION FOR COMPLETE SYSTEM Structural Calculations Electrical Calculations Photovoltaic Specification Inverter Specification Water/Air Testing U-Value Testing UL Approval Monitoring Final Commissioning Lifecycle Replacement BiPV ROOFTOP vs VERTICAL ARRAYS
Rooftop arrays with standard orientation compared to the performance of four BiPV Systems over Fourteen months of monitored data shows vertical wall performance equals 72% of rooftop array.
VISION vs SPANDREL GLASS At this time, the cost effective approach to a BiPV curtain wall is to use insulating glass in the vision conditions and photovoltaic panels in all spandrel conditions. The cost of transparent photovoltaic panels is 8-20 times more than standard utility grade panels. The performance values drop to 10% of the utility grade panels. Solution - use Utility Grade panels in spandrel areas and use BiPV sunscreens to improve SHGC and increase surface area of PV on the wall.
GOVERNMENT INCENTIVES AND REBATES
Federal tax credit, 30% of BiPV in first year MACRS accelerate depreciation, reduces full depreciation time from 39 years to 5 years Local utilities offer substantial incentives Energy production for 25 years 100% payback in 24 months
EXAMPLE: FIVE STORY OFFICE BUILDING
nick@focus-materials. com 310.962.4087