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SUMMARY:Working with atria: natural ventilation in multi-storey buildings 
 - Dr Andrew Acred\, CUED
DTSTART:20150515T120000Z
DTEND:20150515T130000Z
UID:TALK59433@talks.cam.ac.uk
CONTACT:Aleksandra Przydrozna
DESCRIPTION:Natural ventilation is one of a number of low-energy building 
 design tools available to architects and engineers. By harnessing the free
 ly available driving forces of the wind and buoyancy\, fresh air can be de
 livered to building occupants\, providing a healthy and comfortable indoor
  environment with minimal energy input. Buoyancy-driven ('stack') ventilat
 ion has particular potential for use in tall multi-storey buildings\, and 
 can work hand in hand with 'vertically spanning' architectural features su
 ch as atria\, lightwells and solar chimneys. However\, by linking multiple
  storeys an atrium can add complexity to the ventilation design and result
  in the possibility of undesirable flow patterns and uncomfortable indoor 
 conditions\, particularly on the top storey. In order to address these cha
 llenges\, we develop a simple design approach – based on simple mathemat
 ical models that capture the core physics of ventilating flows – to prov
 ide rapid and intuitive guidance to designers. We determine a number of ru
 les of thumb for sizing vents\, quantifying the ventilation performance of
  the atrium and informing the choice of ventilation strategy. The work is 
 intended to provide a starting point for more detailed modelling with CFD 
 and other software tools and\, crucially\, to provide an intuitive underst
 anding of some key design issues to engineers\, architects and building oc
 cupants alike.
LOCATION:LR3B\, Inglis Building\, CUED.
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