Daylight and Energy: Designing with Insuating Glass Unites (IGU’s) with Integrated Cord-Free – Unicel

1,755 views
1,652 views

Published on

Published in: Education

Daylight and Energy: Designing with Insuating Glass Unites (IGU’s) with Integrated Cord-Free – Unicel

  1. 1. welcome!2
  2. 2. Designing with Insulated Glass Units (IGUs) with integrated cord-free louvers AN AIA CONTINUING EDUCATION PROGRAM EDUCATION PROVIDER INFOSPEC, INC. CREDIT FOR THIS COURSE IS 1 AIA/CES HSW/SD LEARNING UNIT 1 GBCI CE HOUR FOR LEED PROFESSIONALS3 © InfoSpec, Inc. 2010
  3. 3. Approved Promotional Statement: InfoSpec, Inc. is a Registered Provider with The American Institute of Architects Continuing Education Systems (AIA/CES). Credit(s) earned on completion of this program will be reported to AIA/CES for AIA members. Certificates of Completion for both AIA members and non-AIA members are available upon request. This program is registered with AIA/CES for continuing professional education. As such, it does not include content that may be deemed or construed to be an approval or endorsement by the AIA or InfoSpec, Inc. of any material of 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 will be addressed at the conclusion of this presentation.4
  4. 4. Course Format: This is a structured, Face to Face course. Course Credit: 1 Health Safety & Welfare (HSW) Sustainable Design (SD) Learning Unit (LU) Completion Certificate: A copy is sent to you by email upon request. When you fill out the Course Attendance, please indicate if you need one. Also please ensure the information you provide is legible. Send email request to certificate@infospecinc.com Design professionals: Certificates of Completion are sent to your email address.5
  5. 5. InfoSpec, Inc.Daylight and Energy: Designing with Insulating Glass Units (IGUs)with integrated cord-free louversUSGBC Course ID: 0090005159 1 6
  6. 6. designing with Insulated Glass Units (IGUs) with integrated cord-free louvers7
  7. 7. When the design professional completes this course, they will be able to: Describe the benefits of designing with daylight. List several strategies for daylight optimization. Explain what IGUs with integrated cord-free louvers are. List several ways IGUs with integrated cord-free louvers improve energy efficiency and control heat gain. List several application examples and explain the sustainable design features of each. Explain the operating options for IGUs with integrated cord- free louvers. List the sustainable design benefits of incorporating IGUs with integrated cord-free louvers into your project.8
  8. 8. health, productivity and strategies9
  9. 9. Lighting is a major energy-user in buildings – around 24% of the energy used by commercial buildings. Shares of primary energy use in U.S. commercial buildings (USDOE, 2008) Figure source: www.interacademycouncil.net10
  10. 10. Should be able to provide sufficient thermal resistance. Meet aesthetic requirements. Provide adequate transparency for the occupants to have visual contact with the exterior. Should be able to bring in appropriate level of daylight.11 glassmarble.cn
  11. 11. Why would a building owner want to take on the challenge of using daylight to light a building? In a word, money. A good daylighting design can save up to 75 percent of the energy used for electric lighting in a building. Using Daylighting To Save On Energy Costs By David Kozlowski April 2006 www.aeieng.com/services/sustainability12
  12. 12. “Daylighting, when done well, can reduce building energy use substantially by reducing its need for electric lighting, cooling and heating." "Our research suggests that in a daytime-occupied commercial building, dimmable daylighting controls could reduce the total electricity and peak demand between 20 and 40 percent." Environmental Energy Technologies Division (EETD) research program called "Daylighting with Integrated Envelope and Lighting Systems.“ Stephen Selkowitz, head of EETD’s Building Technologies Department, and Eleanor Lee, EETD Project Manager www.lbl.gov/Science-Articles/Archive/daylight-energy.html13
  13. 13. Daylighting is considered full spectrum lighting. Studies have shown that full spectrum lighting is essential for normal human activities. Daylighting has been associated with: Improved mood Enhanced morale Lower fatigue Reduced eyestrain Increased learning ability Faster healing14
  14. 14. Natural light affects the human Circadian Rhythm. The Circadian Rhythm is a 24-hour cycle to which most physiologic processes are set. In the absence of natural light the body’s normal rhythm is upset. This can lead to: Hormonal imbalances Sleep disorders Mood disturbances When sunlight enters our eyes it causes melatonin levels to decrease stimulating wakefulness and enhanced moods. If daylight and artificial light in the interior of buildings are inadequate, melatonin can increase—causing fatigue and depression.15
  15. 15. Quality daylight in workspace increases occupants’ productivity and level of comfort. Daylighting is an effective way of reducing energy use in buildings. Large amounts of energy can be saved by using well designed lighting controls that can take advantage of the natural light available. Galasiu and Veitch 2006 Bourgeois et al. 2006, Kapsis 2009, Robinson 200916
  16. 16. Benefits of daylighting in schools include: Increased student and teacher attendance. Increased achievement rates. Reduced fatigue factors. Improved student health. DayStar Sunlighting Systems. (1998). “Benefits of Natural Daylighting.” http://www.daystarsunlighting.com/benefits.htm. Accessed June 11, 1998 Heschong Mahone Group studies have shown that: Students perform better under natural light. “Students with the most daylighting in their classrooms progress 20% faster on math tests and 26% faster on reading tests in one year than those with the least.” Daylighting in Schools - An Investigation into the Relationship Between Daylighting and Human Performance” HESCHONG MAHONE GROUP - Fair Oaks, CA17
  17. 17. The incredible amount of energy in sunlight. On a clear day, the sun provides 8,000 to 10,000 foot-candles of light. Even through the glass, it provides 5,000 foot-candles on a clear day and 1,000 foot-candles on a cloudy day. Most people need a mere 35 foot-candles to read. Compounding the problem: sunlight contains more heat than visible light. The sunlight that pours through a typical 4-by-8-foot window section in an afternoon can heat 15 to 30 gallons of water to a temperature hot enough to take a shower. Optimize visible light while reducing heat gain. Using Daylighting To Save On Energy Costs By David Kozlowski April 200618
  18. 18. In passive solar building design, windows, walls, and floors are made to collect, store, and distribute solar energy in the form of heat in the winter and reject solar heat in the summer. Take advantage of the local climate and sun path. Elements to be considered include window placement and glazing type, thermal insulation, thermal mass, and shading.19
  19. 19. Design spaces to use diffuse light from the sky – not direct sunlight. Diffused daylighting creates uniform, consistent lighting. Use daylighting as the primary source of illumination.20
  20. 20. Great interior daylighting features are offset by an exterior architectural language that defines the daylighting intentions within. The electric lighting should be designed to supplement daylight . Treat skylights or top lighting as light fixtures. Use lighting design simulation tools . to ensure proper illumination. Use light colored surfaces throughout the building. Paint the ceiling white to promote. bounce and diffusion through spaces An atrium is a traditional design feature that offers a wealth of daylight into deep interior spaces.21
  21. 21. Fenestration articulation suggesting building orientation, sun path and lighting intentions is one such example of offering an intriguing vocabulary to support the function of daylighting design.22
  22. 22. IGUs with integrated cord-free louvers23
  23. 23. 24
  24. 24. With a project you have designed, you want to ensure that the refined finished work stays that way for many years to come. With cords and individual operators, post-construction installation options can become an unforeseen blemish. Integrated louvers will never sag. Integrated louvers will never touch the inside face of the interior glass when installed on sloped surface.25
  25. 25. 26
  26. 26. Manage the quantity and quality of light transmission. With a precise control mechanism, the louvers can rotate 180 degrees, installed horizontally or vertically. Better natural light distribution by simply rotating louvers. The depth of a room can be daylit, while still reflecting the light back outside. Attributable to light diffusion through the louvers.27
  27. 27. IGUs with integrated cord-free louvers28
  28. 28. Heat build-up is a primary concern when considering glazing solutions. IGUs with integrated cord-free louvers offer the ideal approach for controlling heat flow resulting from convection and solar exposure. Even opened, IGUs with integrated cord-free louvers will block heat more efficiently than most glass products while offering a perfect light reveal. Half-opened, the performance is still convincing and the amount of interior light is still pleasantly noticeable. Closed, IGUs with integrated cord-free louvers block solar exposure to almost 100% and acts as a shield against heat during peak hot summer periods.29
  29. 29. The Solar Heat Gain Coefficient (SHGC) measures how well a window blocks heat from sunlight. The SHGC is the fraction of the heat from the sun that enters through a window. SHGC is expressed as a number between 0 and 1. The lower a window’s SHGC, the less solar heat it transmits.30
  30. 30. Louvers can be accurately controlled at any tilt angle. Unique advanced glazing unit which provides variable SHGC and the freedom of changing its transparency. Summer: operate louvers to cutoff direct sunrays to achieve significant reduction in peak cooling load. Winter: operate louvers parallel to the sunrays and use solar energy to heat the interior space. Best view to exterior Summer Winter Normal IGU & Maximize solar Cut off Daylighting direct sunrays heat gain31
  31. 31. In heat transfer, conduction (or heat conduction) is the transfer of thermal energy between neighboring molecules in a substance due to a temperature gradient. Windows lose or gain heat by conduction through the window spacer.32
  32. 32. For regular IGU, low-e coated glass is an effective way of controlling heat loss/gain by radiation.33
  33. 33. During hot summer days, louvers can be closed to reduce heat gain by radiation. The same is true for cold winter nights: keep the heat in.34
  34. 34. Heat itself causes the fluid motion (via expansion and buoyancy force), while at the same time also causing heat to be transported by this bulk motion of the fluid. This process is called natural convection.35
  35. 35. Inside the louvered window cavity. Red color indicates higher air speed near both sides of glass surfaces. The natural convection current forms a loop inside the window cavity and accelerates the heat loss. Cold side Hot side36
  36. 36. Cold side Hot side Cold side Hot side Cold side Hot side No louvers Fully opened Fully closed Heat loss by convection is greatly reduced by introducing integrated louvers37
  37. 37. exterior and interior38
  38. 38. For heat control, IGUs with integrated cord-free louvers are used in atriums, solariums, large open lobby spaces and office buildings. Also, for light control, it is ideal for libraries, museums (where it protects books and exhibits from UV rays), audiovisual conference rooms, etc.39
  39. 39. Top daylighting section: Always open for daylighting purposes. Louvers reflect daylight into the deeper interior. Middle viewing section: Controlled according to occupants’ preferences. Fully opened for the best view to the exterior. Partially closed for privacy. Solar heat gain is controlled No glare from direct sunlight, improved visual comfort Intelligent control will further enhance the daylighting performance40
  40. 40. Sound Control Sound is controlled far more efficiently with insulated glass units. Why? Because increasing the depth of the airspace in an insulated glass unit also increases the acoustical performance of the unit. Insulated glass unit with airspaces of 2” and 2 ½” improves sound control. STC Ratings 45 and up.41
  41. 41. Vision and Privacy Control Educational Facilities Health Care Facilities Libraries Charting alcoves Gymnasiums Scrub Sinks Auditoriums Patient Rooms ICU sliding Doors Museums Operating Rooms Art Galleries Emergency Departments Atriums Book Stores Correctional Facilities Interrogation Rooms Prison Cells Sheriff’s Offices42 42
  42. 42. Hygiene Infection control is a concern. Unit is hermetically sealed so there are no cleaning and maintenance issues, louvers remain hygienic and germ- free at all times.43
  43. 43. Project: Project: Memorial Hospital Memorial Hospital Location: Location: South Bend, IN South Bend, IN Client: Client: Harmon Harmon Architect: Architect: The Troyer Group The Troyer Group44
  44. 44. Project: Project: Lapua Music Lapua Music School School Location: Finland Location: Finland Client: Client: Vitrea Oy Vitrea Oy Architect: Helena Teravainen Architect: Helena Teravainen45
  45. 45. Project: Project: UNC Women’s and UNC Women’s and Children’s Hospital Children’s Hospital Location: Chapel Hill, NC Location: Chapel Hill, NC Client: Client: Vetro Vetro Architect: HKS Architect: HKS46
  46. 46. Project: Project: Jacobson Athletic Jacobson Athletic Facility, Facility, Iowa State University Iowa State University Location: Ames, IA Location: Ames, IA Client: Client: Architectural Wall Architectural Wall Systems Systems Architect: Herbert Lewis Kruse Architect: Herbert Lewis Kruse Blunck Blunck47
  47. 47. Project: Project: Ohzuma Gakuen Ohzuma Gakuen University University Location: Location: Tokyo, Japan Tokyo, Japan Client: Client: Tostem Corp. Tostem Corp. Architect: Architect: Nikken Sekkei Nikken Sekkei48
  48. 48. Project: Project: Varsity Village – Athletic Center Varsity Village – Athletic Center University of Cincinnati University of Cincinnati Location: Location: Cincinnati, OH Cincinnati, OH Client: Client: Waltek Waltek Architect: Architect: Glaserworks //Bernand Tschumi Glaserworks Bernand Tschumi Architects Architects49
  49. 49. Project: Project: Residence Choquet Residence Choquet Location: Location: St. Bruno, Quebec St. Bruno, Quebec50
  50. 50. controls, profiles, and finishes51
  51. 51. Intelligent control is available with any customized control strategies. Main objective is to control the louver tilt angle according to exterior daylight availability. Maximize the view to exterior. Further the savings in electrical lighting system and air conditioning system.52
  52. 52. 53
  53. 53. Electrical and Remote Control Intelligent Control54
  54. 54. Four different spacer sizes for a wide range of interior and exterior applications.55
  55. 55. 3/16” (5mm) thick to a maximum glass span of 44” (1219mm) 1/4” (6mm) thick to a maximum glass span of 48” (1219mm) 3/8” (10mm) thick to a maximum glass span of 58” (1473mm) 1/2” (13mm) thick to a maximum glass span of 68” (1727mm)56
  56. 56. Louvers come in a diverse array of colors and finishes. Surface finish choices can affect the light reflection. As louvers are integrated, outdoor grime cannot settle on their surfaces affecting their daylighting performance. Specular reflection Intermediate reflection Diffuse reflection57
  57. 57. IGU benefits summary and questions58
  58. 58. A 14-story office building with fully glazed facades. Total glazed areas: South/North 36,059 ft2 (3350 m2) East/West 21,259 ft2 (1975 m2) IGU w/ Savings compared to double glazing ($) integrated Triple glazing louvers Capital cost savings (boiler size) $33,120 $47,640 Capital cost savings (chiller size) $149,250 $14,520 Total capital cost savings $182,370 $62,160 Annual operational energy savings (heating) $25,840 $26,960 Annual operational energy savings (total electricity and peak cooling demand $101,850 $16,170 reduction) Total annual operational energy savings $127,690 $43,13059
  59. 59. Incorporating IGU with integrated cord-free louvers may contribute towards your project becoming LEED® Certified through the following credits in BD+C. EA Credit 1: Optimize Energy performance (1-19 Points) IEQ Credit 7.1: Thermal Comfort – Design IEQ Credit 8.1: Daylight and View – Daylight IEQ Credit 8.2: Daylight and View – Views ID Credit: Intelligent control of louver tilt angle is used for controlling solar heat gain and enhancing daylighting.60
  60. 60. Louvers help reduce glare and protect against fading. Creates the ideal wall conditions for art galleries, museums, libraries and other areas where light control is an absolute necessity. Sufficient daylight can enter the building without allowing excessive unwanted solar gains. Reduce the incoming solar gains to the minimum indoor luminance requirement. By installing insulated louvered glass in exterior applications, the need for artificial lighting and cooling equipment is significantly reduced. Integrated louvers offer total control of the sun’s rays and adjust the contribution of daylighting to open and adjacent spaces. Rotating louvers provide control of vision and privacy.61
  61. 61. Now the design professional will be able to: Describe the benefits of designing with daylight. List several strategies for daylight optimization. Explain what IGUs with integrated cord-free louvers are. List several ways IGUs with integrated cord-free louvers improve energy efficiency and control heat gain. List several application examples and explain the sustainable design features of each. Explain the operating options for IGUs with integrated cord- free louvers. List the sustainable design benefits of incorporating IGUs with integrated cord-free louvers into your project.62
  62. 62. The remaining 10 minutes will be focused on reviewing course content.63
  63. 63. For AIA members In order to maintain high-quality learning experiences, please access the evaluation for this course by logging into CES Discovery and clicking on the Course Evaluation link on the left side of the page64
  64. 64. Designing with Insulated Glass Units (IGUs) with integrated cord-free louvers AN AIA CONTINUING EDUCATION PROGRAM EDUCATION PROVIDER INFOSPEC, INC. CREDIT FOR THIS COURSE IS 1 AIA/CES HSW/SD LEARNING UNIT 1 GBCI CE HOUR FOR LEED PROFESSIONALS65 © InfoSpec, Inc. 2010

×