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      Aperture-Based Daylight Modelling by Professor John Mardaljevic; and AGM in City of London


      • Aperture-Based Daylight Modelling by Professor John Mardaljevic; and AGM Photo #1
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      November 13, 2019

      Wednesday   1:30 PM

      Trafalgar Square
      City of London, Westminster SW1Y 5

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      EVENT DETAILS
      Aperture-Based Daylight Modelling by Professor John Mardaljevic; and AGM

      1. Daylight Group AGM at 1.45 pm. 2. 'Aperture-based Daylight Modelling' by Professor John Mardaljevic in discussion with Andrew Bissell and another. Subtitle 'Reculer pour mieux sauter'.  Starting at 2.00 pm, this presentation describes a new modelling schema to evaluate building apertures (e.g. windows) based on numerical measures of their 'connectedness' to the sun, the sky and the view of the external environment.  It introduces the concept of the view lumen – this is the illumination effect received at the building aperture from a visible external entity (e.g. ground, sky, obstruction, etc.), which is made self-luminous for this purpose. Discussed will be the fundamental principle behind the view lumen and preliminary illustrations of the technique to show its potential. The schema employs the British Standard framework to define categories of view, i.e. sky, natural or man-made objects (e.g. buildings) and ground. Aperture-Based Daylight Modelling (ABDM) is an extension of the recently introduced sunlight beam index.  The measures for sun, sky and view determined by ABDM are purely geometrical. Thus it is proposed that an ABDM evaluation should be carried out at the earliest stages of design.  Additionally, the ABDM schema could serve as the basis for a new way to consider the potential of windows to provide sunlight, skylight and views for the purposes of planning and guidelines.  In many ways, ABDM can be considered a radical new way to evaluate windows.

      Categories: Science

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