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.

1. VELUX Daylight Visualizer 2 An Intuitive and User-Friendly Simulation Tool for Accurate Daylighting Predictions Daylighting Seminar, 26 May 2010 Nicolas Roy, Architect VELUX A/S, Department of Daylight, Energy and Indoor Climate

5. Roof/Ceiling

6. Windows/Doors

7. Surfaces

8. Furniture

9. Location

10. Camera

12. Zoom out

14. Zoom in

15. Zoom out

16. Fit

18. Zoom in

19. Zoom out

20. Fit

21. MeasureInput area User input area includes predefined settings, product databases (windows) and numerical entries Guidance text Step by step instructions following the user actions Screenshot of Daylight Visualizer 2 user interface

23. Surfaces

24. Location

25. Camera

27. Zoom in

28. Zoom out

29. Fit

30. MeasureScreenshot of Daylight Visualizer 2 user interface – 3D Importer

31. Intuitive user interface Perspective camera Camera preview The 3D view changes to a camera preview when defining the perspective view Perspective view A perspective view is defined by placing and orienting the camera icons in the ”Plan” and ”Section” view ports Screenshot of Daylight Visualizer 2 user interface

32. Predefined settings Daylight Visualizer 2 uses predefined settings to ensure realistic inputs and the validity of the models and simulations. Custom settings User defined settings can also be specified in order to ensure a good level of flexibility Screenshot showing the assignment of predefined surface properties. Screenshot showing the predefined render specifications for still images.

33. Efficient workflow Users can perform quick comparisons between different scenarios such as window layout, pane properties, room surfaces, sky conditions, locations, and orientations. Room 1 Room 2 Room 3

34. Efficient workflow Users can perform quick comparisons between different scenarios such as window layout, pane properties, room surfaces, sky conditions, locations, and orientations. Room 1 Room 2 Room 3

35. Results and metrics Daylight Visualizer 2 uses recognized metrics and performance indicators, including luminance (cd/m2), illuminance (lux) and daylight factor (%). Luminance Illuminance Daylight factor

36. Results and metrics Rendered images can be viewed in photorealistic, false colour and/or ISO contour modes. Photorealistic False colour ISO contour

37. Results and metrics Simulations can be performed as still images, annual overviews and animations.

38. Validation against CIE 171:2006 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. Description of test case 5.9 (CIE 171:2006) Average error between the simulation results obatined with Daylight Visualizer 2 and the CIE 171:2006 analytical references (ENTPE) Description of test case 5.7 (CIE 171:2006)

40. VELUX Daylight Visualizer 2 passed the CIE 171:2006 test cases dedicated to natural lighting.

42. Example Home for Life (Aarhus, Denmark) Luminance renderings – Sunny sky conditions

43. Example Home for Life (Aarhus, Denmark) Luminance renderings – Overcast sky conditions

44. Example Home for Life (Aarhus, Denmark) Ground floor First floor Daylight factor simulations

45. Example Home for Life (Aarhus, Denmark) February April March January June August July May October December November September Luminance renderings – Annual overview – Sunny sky conditions (21st at 12:00)

46. Example Home for Life (Aarhus, Denmark) February April March January June August July May October December November September Luminance renderings – Annual overview – Sunny sky conditions (21st at 12:00)

47. Example Solhuset kindergarten (Hoersholm, Denmark) Daylight factor simulation (0.85m above the ground)

48. Example Solhuset kindergarten (Hoersholm, Denmark) Group room 2 Luminance and illuminancelevels - 21/12 at 12 o’clock, withintermediate sky

49. Example Solhuset kindergarten (Hoersholm, Denmark) Group room 2 Luminance and illuminancelevels - 21/3 at 12 o’clock, withintermediate sky

50. Example Solhuset kindergarten (Hoersholm, Denmark) Group room 2 Luminance and illuminancelevels - 21/6 at 12 o’clock, withintermediate sky

51. Example Solhuset kindergarten (Hoersholm, Denmark) Group room 6 Luminance and illuminancelevels - 21/6 at 12 o’clock, withintermediate sky

52. Example Solhuset kindergarten (Hoersholm, Denmark) Circulationarea Luminance and illuminancelevels - 21/6 at 12 o’clock, withintermediate sky

53. Example Solhuset kindergarten (Hoersholm, Denmark) Design iteration Initial design The daylight conditions in the initial design are evaluated using the daylight factor (DF) performance indicator. 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. Revised design 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. 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. Final design 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. The daylight factor simulation of the final design shows a significant improvement over the results obtained with the initial design.

54. Example Generic house (France) Daylight factor simulations – situation withoutroofwindows

55. Example Generic house (France) Daylight factor simulations – situation withroofwindows

56. Example Generic house (France) Staircase Luminancerenderings – situation withoutroofwindows

57. Example Generic house (France) Staircase Luminancerenderings – situation withroofwindows

59. Examples

60. Tutorials

61. News

62. Newsletter