Comparing glazings

Comparing glazings

Using Ocean for building design

The Ocean software can generate accurate images of complex materials such as coated glass. This makes it an interesting tool for building design, as it is possible to predict the aspect of the project depending on used materials, by doing virtual mock-ups, without any construction cost.

Many questions can be answered, before building any physical sample:

  • What will be the perceived color of the material?
  • What will the building look like under overcast sky? Under direct sunlight? At night?
  • Will the people outside the building see inside? Or will they see mostly reflections?
  • Will there be undesirable distorted reflections?
  • What will be the amount shading provided by the windows?

Any material can be simulated. This ranges from advanced coated glass, to concretes, metal sheets, serigraphy, perforated sheets, etc…

 

Example : comparing several glazings on a facade

This image was simulated with Ocean and compares four different double glazings. Front pane 6mm, from left to right : mass tinted blue glass, clear glass, and two low-E glasses. Counter panes are all 6mm clear glass
Left to right : Blue float, Clear float, Low-E Coating A, Low-E Coating B

In this example, we study a refurbished glass facade, inspired from a real building, to compare four different glazings.  The double glazing units have the same thickness (6mm for both panes) and spacing (16mm), and the counter glasses (inner pane) are all made of clear float glass. Only the front pane differ and are, from left to right:

  • Blue tinted float glass, 6mm
  • Clear float glass, 6mm
  • Shading coated low-E glass, 6mm
  • Another shading coated low-E glass, 6mm

Some tempering-like distortions and thermal bending was applied on the glass panes. The lighting correspond to a cloudy day and is based on a real hemispherical sky picture, or envmap.

As for all Ocean simulations, no approximation is made over the laws of geometry optics. The calculation is spectral and takes into account light polarization. Especially, the lighting of the building’s interior is fully correct and takes into account light filtering by the glass materials.