Daylighting with Aerogel-Filled Multiwall Polycarbonate

Transcription

1 Daylighting with Aerogel-Filled Multiwall Polycarbonate AmeriLux International Enterprise Dr DePere, WI (888) f:(920) Provider Number:K408 Course Number:AME107AFD Learning Units: 1.00

2 This program is registered with AIA/CES for continuing professional registration. As such, it does not include content that may be deemed or construed to be an approval or endorsement by the AIA of any material or construction or any method or manner of handling, using, distributing or dealing in any material or product. Questions related to specific materials, methods and services should be directed to the program instructor. 2

3 Learning Objectives 1. What is aerogel: Chemical make up, production methods, sustainable nature, and high performance of aerogel. 2. Importance of Daylighting: How natural light improves our moods, health, and productivity. Sustainable features of natural light over artificial lighting. 3. Aerogel features and performance: Aerogels ability to overcome past daylighting issues such as thermal loss and glare. 4. Aerogel filled multiwall polycarbonate: Combining the thermal performance and light diffusion with the strength and usability of multiwall polycarbonate. 5. Applications: How aerogel filled multiwall polycarbonate is easily integrated into existing daylighting systems. 3

4 Aerogel Technology Made from pure silicon dioxide.

5 Aerogel Discovered in Early 1930 s Development Limited by High Costs and Safety Risks Aerogel discovered by Steven Kistler Monsanto develops first commercial operation First attempts to commercialize New process

6 New Manufacturing Process Unique, Safe, Environmentally Sound and Cost Affective water silica sol organic water nitrogen organic Patented sub-critical manufacturing process hydrogel silation organogel drying aerogel Typical super-critical manufacturing process Uses more expensive precursor Organosilanes Requires processing of flammable solvents in supercritical (high pressure, temp) conditions Ethanol Liquid CO 2 High energy costs High Carbon Footprint

7 Certified as Green Building Product In 2002, McDonough Braungart Design Chemistry, LLC (MBDC) performed a Cradle-to-Cradle design assessment and certification of aerogel. In 2008, aerogel was recertified according to MBDC s updated standards. Green material selection involves an assessment of a product s life cycle environmental impact in the following areas: Raw Materials - Safe for human and ecological systems Manufacturing Process - The closed loop process implements best available technologies and is consistent with the principles of Cradle-to-Cradle design philosophy Characteristics in Use - Provides an elegant solution to the problem of thermal insulation Disposal Options Aerogel is recyclable and reusable Source: 1) Green Building Design Guidelines, Sustainable Building Industry Council, March ) MBDC Cradle to Cradle Design - Review of Aerogel, February 2003.

8 Performance Features of Aerogel Aerogel s unique combination of properties provide performance benefits unequaled in existing building materials: Heat Sound Light Moisture Heat Heat Transfer Minimized Sound Transmission Reduced Light is Diffused Average pore size is 20 nanometers Moisture Repelled *Illustration depicts the highly porous structure of aerogel

9 Principles of Heat Transfer Heat is transferred by three processes: Conduction is the transfer of heat along and through a solid material by contact of one molecule to the next. Heat flows from a higher temperature area to a lower temperature one. Convection is a heat transfer process involving the movement of gases or liquid within a space activating the transfer of energy from hot molecules to colder ones. Radiation is the movement of heat through space via electromagnetic, infrared radiation from one surface to another.

10 How Aerogel Minimizes Heat Transfer Aerogel s high porosity and fine structure ensure excellent thermal performance in inhibiting heat transfer: Conduction: The low solid content of Aerogel reduces the transfer of heat through solid phase conduction. Convection: The pore size of aerogel traps gas molecules preventing them from colliding and transferring heat. Gas molecules in open space Gas molecules in aerogel Radiation: Aerogel can be opacified minimizing heat radiation by absorbing it. Source: Donald Wulfinghoff, Energy Efficiency Manual, Heat Source

11 Drivers for Daylighting Practice ENVIRONMENTAL ERGONOMIC PRODUCTIVITY ECONOMIC

12 Environmental Focus Creates Tension in Practical Execution Building and Energy Sustainability Developing solutions to increasingly stringent energy codes. Utilizing energy efficient solutions. Environmental Responsibility Designing with green sustainable building products. Indoor Environmental Quality Creating healthier living space. Optimize designs with natural diffused daylight. LEED Certification Recognized leadership in the green building of great spaces.

13 Why does Daylighting deliver these economic and ergonomic benefits? Sunlight (Full Spectrum Lighting) Incandescent Bulb (Artificial Lighting) Full Spectrum Light is the source of life and essential to our well being, health and development. Artificial Light is a gross distortion of full spectrum light, lacking most of its spectral components. Daylighting is using full to near full spectrum natural light to reduce the need for artificial lighting and reap environmental, ergonomic and economic benefit. Environmental and Economic Benefits come from more sustainable life cycle costs of the total in use cost of the building including the cost of occupants and its operations.

14 Daylighting, Impacts beyond comfort. Human Health: Human Heath and Natural Light Circadian System Sleep / Wake Cycle Circadian Rhythm Natural Light Varies in intensity throughout day Changes effect sleep patterns, metabolism, immune system Natural light only proven system 14

15 Quantifiable benefits to daylighting Provided by in Daylighting most building types.

16 Good Daylighting Saves $$ Each kwh of electricity used for commercial lighting adds ~.5 kwh of electricity needed for cooling - daylighting saves both lighting and cooling loads Cost Lighting Cooling *LEED 2007 Design Standards

17 Aerogel Fills a Technical Gap In Sustainable Daylighting Average Building exterior construct insulation performance levels are: walls = R-19 Roofs = R-30 Window = R-2.6 Skylights = R- 2 By All In use Metrics - Daylighting Delivers substantial and measurable benefits Daylighting trade offs are forced by poor performance Amount of useful glazing area restricted Aerogel Daylighting systems insulation improved substantially At minimum 2X Full Spectrum Permanent Certified Green Benefits compromised or eliminated

18 Daylighting Essential for Successful Sustainable Design Directing the right amount of natural light into buildings is both an art and a science. Some design challenges met with Aerogel: Reducing/eliminating glare Illumination level is highly subjective Creating diffused quality light Minimizing thermal loss Reducing solar heat gain Preventing convective downdrafts Improving resistance to condensation Reducing sound transmission Being environmentally responsible

19 Effective Daylighting Requires Balance Too much contrast between dark and light, from very bright light to very dark shadows, is uncomfortable for the eyes.

20 Uni-directional Natural Light Lacks Balance and Distribution

21 Translucent Fenestration Provides Improved Distribution of Light

22 Alternative Options for Glare and Solar Control Exterior Shades Interior Blinds Light Shelves Etched or Fritted Glass 22

23 Quantifying Diffusion Performance Light Diffusion Power (LDP) Section through Test Setup

24 Quantifying Diffusion Performance Light Diffusion of Clear Glass Transparent glass transmits light directly with no diffusion.

25 Quantifying Diffusion Performance Light Diffusion of Acid Etched Glass Acid etched glass diffuses in a shallow angle, partially obscuring view

26 Quantifying Diffusion Performance Light Diffusion of Laminate w/pvb Interlayer White PVB laminate glazing creates partial diffusion

27 Quantifying Diffusion Performance Light Diffusion of Aerogel filled Multiwall Polycarbonate Glazing of up to16mm moves almost half the light upward Aerogel

28 Quantifying Diffusion Performance Light Diffusion of Aerogel filled Multiwall Polycarbonate Glazing of > 25mm moves almost half the light upward Aerogel

29 Modeled Diffusion Performance 16mm PC without Aerogel

30 Modeled Diffusion Performance 16mm PC with Aerogel

31 Environmental Focus Creates Tension in Practical Execution Building and Energy Sustainability Developing solutions to increasingly stringent energy codes. Utilizing energy efficient solutions. Environmental Responsibility Designing with green sustainable building products. Indoor Environmental Quality Creating healthier living space. Optimize designs with natural diffused daylight. LEED Certification Recognized leadership in the green building of great spaces.

32 Integrating Aerogel into Daylighting Systems: Multiwall Polycarbonate

33 Aerogel-Filled Multiwll Polycarbonate State of the Art Filling Process Panels filled with Aerogel particles. Full size panels. Climate controlled environment. Inspected and taped.

34 Aerogel-Filled Multiwall Polycarbonate Aerogel IGU Standard 25mm Panel Aerogel Filled 25mm Panel R-Value * Light Transmission Solar Heat Gain Coefficient STC Value (Sound) 74% 72% 49%* * na *Values verified by NFRC Testing for 25mm filled panel 34

35 Channel Glass Building 115, Seattle, WA

36 Unit Skylights Giant Food, Fredericksburg, VA

37 Aerogel-Filled Multiwall Polycarbonate

38 Aerogel-Filled Multiwall Polycarbonate

39 Additional Possibilities Vertical Tongue and Grove Systems

40 Key Features Thermal performance Twice that of traditional glazing Light transmittance Up to 49% with an R 6.25 Light diffusion Close to 100% diffusion Sustainable Products Recyclable & Cradle to Cradle Reduction of artificial lighting Improved health Improved performance. Farmer s Mutual Building Des Moines, IA

41 Aerogel-Filled Multiwall Polycarbonate Resources Available 1. Spec and Drawing information 2. Loading and Performance Data 3. Chose the right product for your project 4. Connect to the right systems manufacturers 5. Get samples and literature 6. Get fire testing and other certificates 7. Get AIA credit 42

42 This concludes our presentation. We will be happy to answer any questions regarding this presentation, specific project, or product. us: Thank You for Attending! Toll-free: Fax: (920)