VELUX Daylight Visualizer 2 An Intuitive and User-Friendly Simulation Tool for Accurate Daylighting Predictions<br />Dayli...
VELUX Daylight Visualizer 2<br />Lighting engine<br /><ul><li> Global illumination using bidirectional Monte Carlo ray tra...
 Predict and document daylight levels and appearance of a space prior to realization of the building to promote good dayli...
 Professional house builders/developers/specifiers</li></li></ul><li>Intuitive user interface<br />3D Modeller<br />Progre...
 Roof/Ceiling
 Windows/Doors
 Surfaces
 Furniture
 Location
 Camera
 Render</li></ul>3D view<br />The model can be viewed in real time as a ”wire shaded” rendering<br /><ul><li> Zoom in
 Zoom out
 Fit</li></ul>Edit view<br />A view from the top is used to define the 3D model and insert windows<br /><ul><li> Pan
 Zoom in
 Zoom out
 Fit
 Measure</li></ul>Section view<br />The model can be viewed as a ”wireframe” section<br /><ul><li> Pan
 Zoom in
 Zoom out
 Fit
 Measure</li></ul>Input area<br />User input area includes predefined settings, product databases (windows) and numerical ...
Intuitive user interface<br />3D Importer<br />Progress bar<br />Simulation process has been divided into 5 distinctive st...
 Surfaces
 Location
 Camera
 Render</li></ul>Plan view<br />The 3D Importer uses a ”Plan” view instead of an ”Edit” view<br /><ul><li> Pan
 Zoom in
 Zoom out
 Fit
 Measure</li></ul>Screenshot of Daylight Visualizer 2 user interface – 3D Importer<br />
Intuitive user interface<br />Perspective camera<br />Camera preview<br />The 3D view changes to a camera preview when def...
Predefined settings<br />Daylight Visualizer 2 uses predefined settings to ensure realistic inputs and the validity of the...
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De Beleving van Daglicht - Nicolas Roy

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Op 26 mei 2010 vond "De Beleving van Daglicht" plaats bij VELUX Nederland BV in De Meern. Nicolas Roy presenteerde er namens VELUX de Daylights Visualizer 2.0.

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De Beleving van Daglicht - Nicolas Roy

  1. 1. VELUX Daylight Visualizer 2 An Intuitive and User-Friendly Simulation Tool for Accurate Daylighting Predictions<br />Daylighting Seminar, 26 May 2010<br />Nicolas Roy, Architect<br />VELUX A/S, Department of Daylight, Energy and Indoor Climate<br />
  2. 2. VELUX Daylight Visualizer 2<br />Lighting engine<br /><ul><li> Global illumination using bidirectional Monte Carlo ray tracing and photon mapping.</li></ul>Main objectives<br /><ul><li> Provide professionals with an accessible and user-friendly tool which can perform accurate daylight simulations.
  3. 3. Predict and document daylight levels and appearance of a space prior to realization of the building to promote good daylighting design. </li></ul>Target group<br /><ul><li> Building professionals/architects/engineers/students
  4. 4. Professional house builders/developers/specifiers</li></li></ul><li>Intuitive user interface<br />3D Modeller<br />Progress bar<br />Simulation process has been divided into 8 distinctive steps<br /><ul><li> Floor/Plan
  5. 5. Roof/Ceiling
  6. 6. Windows/Doors
  7. 7. Surfaces
  8. 8. Furniture
  9. 9. Location
  10. 10. Camera
  11. 11. Render</li></ul>3D view<br />The model can be viewed in real time as a ”wire shaded” rendering<br /><ul><li> Zoom in
  12. 12. Zoom out
  13. 13. Fit</li></ul>Edit view<br />A view from the top is used to define the 3D model and insert windows<br /><ul><li> Pan
  14. 14. Zoom in
  15. 15. Zoom out
  16. 16. Fit
  17. 17. Measure</li></ul>Section view<br />The model can be viewed as a ”wireframe” section<br /><ul><li> Pan
  18. 18. Zoom in
  19. 19. Zoom out
  20. 20. Fit
  21. 21. Measure</li></ul>Input area<br />User input area includes predefined settings, product databases (windows) and numerical entries<br />Guidance text <br />Step by step instructions following the user actions<br />Screenshot of Daylight Visualizer 2 user interface<br />
  22. 22. Intuitive user interface<br />3D Importer<br />Progress bar<br />Simulation process has been divided into 5 distinctive steps<br /><ul><li> Scale/Units
  23. 23. Surfaces
  24. 24. Location
  25. 25. Camera
  26. 26. Render</li></ul>Plan view<br />The 3D Importer uses a ”Plan” view instead of an ”Edit” view<br /><ul><li> Pan
  27. 27. Zoom in
  28. 28. Zoom out
  29. 29. Fit
  30. 30. Measure</li></ul>Screenshot of Daylight Visualizer 2 user interface – 3D Importer<br />
  31. 31. Intuitive user interface<br />Perspective camera<br />Camera preview<br />The 3D view changes to a camera preview when defining the perspective view<br />Perspective view<br />A perspective view is defined by placing and orienting the camera icons in the ”Plan” and ”Section” view ports<br />Screenshot of Daylight Visualizer 2 user interface<br />
  32. 32. Predefined settings<br />Daylight Visualizer 2 uses predefined settings to ensure realistic inputs and the validity of the models and simulations.<br />Custom settings<br />User defined settings can also be specified in order to ensure a good level of flexibility<br />Screenshot showing the assignment of predefined surface properties.<br />Screenshot showing the predefined render specifications for still images.<br />
  33. 33. Efficient workflow<br />Users can perform quick comparisons between different scenarios such as window layout, pane properties, room surfaces, sky conditions, locations, and orientations.<br />Room 1<br />Room 2<br />Room 3<br />
  34. 34. Efficient workflow<br />Users can perform quick comparisons between different scenarios such as window layout, pane properties, room surfaces, sky conditions, locations, and orientations.<br />Room 1<br />Room 2<br />Room 3<br />
  35. 35. Results and metrics<br />Daylight Visualizer 2 uses recognized metrics and performance indicators, including luminance (cd/m2), illuminance (lux) and daylight factor (%).<br />Luminance<br />Illuminance<br />Daylight factor<br />
  36. 36. Results and metrics<br />Rendered images can be viewed in photorealistic, false colour and/or <br />ISO contour modes.<br />Photorealistic <br />False colour<br />ISO contour<br />
  37. 37. Results and metrics<br />Simulations can be performed as still images, annual overviews and animations. <br />
  38. 38. Validation against CIE 171:2006<br />Calculations have been validated against CIE 171:2006,Test Cases to Assess the Accuracy of Lightning Computer Program, in collaboration with ENTPE, l‘École Nationale des Travaux Publics de l‘État in France.<br />Description of test case 5.9 (CIE 171:2006)<br />Average error between the simulation results obatined with Daylight Visualizer 2 and the CIE 171:2006 analytical references (ENTPE)<br />Description of test case 5.7 (CIE 171:2006)<br />
  39. 39. Validation against CIE 171:2006<br />Conclusions from ENTPE’s report<br /><ul><li> VELUX Daylight Visualizer 2 can accurately predict daylight levels and appearance of a space lit with natural light, prior to realization of the building design.
  40. 40. VELUX Daylight Visualizer 2 passed the CIE 171:2006 test cases dedicated to natural lighting.
  41. 41. For the custom setting, VELUX Daylight Visualizer 2 simulates natural light transport with a maximal error lower than 5.13 %, and an average error lower than 1.29 %.</li></li></ul><li>Example<br />Home for Life (Aarhus, Denmark)<br />Illuminance renderings – Overcast sky conditions<br />
  42. 42. Example<br />Home for Life (Aarhus, Denmark)<br />Luminance renderings – Sunny sky conditions<br />
  43. 43. Example<br />Home for Life (Aarhus, Denmark)<br />Luminance renderings – Overcast sky conditions<br />
  44. 44. Example<br />Home for Life (Aarhus, Denmark)<br />Ground floor<br />First floor<br />Daylight factor simulations<br />
  45. 45. Example<br />Home for Life (Aarhus, Denmark)<br />February<br />April<br />March<br />January<br />June<br />August<br />July<br />May<br />October<br />December<br />November<br />September<br />Luminance renderings – Annual overview – Sunny sky conditions (21st at 12:00)<br />
  46. 46. Example<br />Home for Life (Aarhus, Denmark)<br />February<br />April<br />March<br />January<br />June<br />August<br />July<br />May<br />October<br />December<br />November<br />September<br />Luminance renderings – Annual overview – Sunny sky conditions (21st at 12:00)<br />
  47. 47. Example<br />Solhuset kindergarten (Hoersholm, Denmark)<br />Daylight factor simulation (0.85m above the ground)<br />
  48. 48. Example<br />Solhuset kindergarten (Hoersholm, Denmark)<br />Group room 2<br />Luminance and illuminancelevels - 21/12 at 12 o’clock, withintermediate sky<br />
  49. 49. Example<br />Solhuset kindergarten (Hoersholm, Denmark)<br />Group room 2<br />Luminance and illuminancelevels - 21/3 at 12 o’clock, withintermediate sky<br />
  50. 50. Example<br />Solhuset kindergarten (Hoersholm, Denmark)<br />Group room 2<br />Luminance and illuminancelevels - 21/6 at 12 o’clock, withintermediate sky<br />
  51. 51. Example<br />Solhuset kindergarten (Hoersholm, Denmark)<br />Group room 6<br />Luminance and illuminancelevels - 21/6 at 12 o’clock, withintermediate sky<br />
  52. 52. Example<br />Solhuset kindergarten (Hoersholm, Denmark)<br />Circulationarea<br />Luminance and illuminancelevels - 21/6 at 12 o’clock, withintermediate sky<br />
  53. 53. Example<br />Solhuset kindergarten (Hoersholm, Denmark)<br />Design iteration<br />Initial design<br />The daylight conditions in the initial design are evaluated using the daylight factor (DF) performance indicator.<br />The simulation shows the areas of the building where the light levels are not sufficient, such as the gymnastic room located in the central part and the dining room facing east (e.g. 5% DF instead of 2% DF). By contrast, it shows high light levels in certain areas which could be used better if re-distributed.<br />Revised design<br />A revised window layout is proposed based on the findings made in the first evaluation, aiming to reach adequate light levels in the central parts of the building. This new model also included angle openings of the window linings.<br />The light levels obtained in the central part of the building and the dining room are much higher than in the previous model, ensuring that all the activity rooms have sufficient daylight.<br />Final design<br />According to the architect, the number of windows and size of the window linings opening has been optimized in the final design to promote a more rational solution in terms of ceiling construction, while keeping a generous and good distribution of daylight inside the rooms. <br />The daylight factor simulation of the final design shows a significant improvement over the results obtained with the initial design. <br />
  54. 54. Example<br />Generic house (France)<br />Daylight factor simulations – situation withoutroofwindows<br />
  55. 55. Example<br />Generic house (France)<br />Daylight factor simulations – situation withroofwindows<br />
  56. 56. Example<br />Generic house (France)<br />Staircase<br />Luminancerenderings – situation withoutroofwindows<br />
  57. 57. Example<br />Generic house (France)<br />Staircase<br />Luminancerenderings – situation withroofwindows<br />
  58. 58. http://viz.velux.com<br />VELUX Daylight Visualizer 2 website<br /><ul><li> Download
  59. 59. Examples
  60. 60. Tutorials
  61. 61. News
  62. 62. Newsletter
  63. 63. FAQ</li></li></ul><li>Thank you for your attention!nicolas.roy@velux.com<br />

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