Purpose Transparent insulation materials TIMs have been developed for application to building facades to reduce heating energy demands of a building. The purpose of this research is to investigate the feasibility of TIapplications for highrise and lowrise office buildings in London, UK, to reduce heating energy demands in winter and reduce overheating problems in summer.Designmethodologyapproach The energy performance of these office building models was simulated using an energy simulation package, Environmental Systems Performanceresearch ESPr, for a full calendar year. The simulations were initially performed for the buildings with conventional wall elements, prior to those with TIsystems TIwalls and TIglazing used to replace the conventional wall elements. Surface temperatures of the conventional wall elements and TIsystems, air temperature inside the 20mm wide air gaps in the TIwall, drybulb zone temperature and energy demands required for the office zones were predicted.Findings Peak temperatures of between 50 and 70C were predicted for the internal surface of the TIsystems, which clearly demonstrated the large effect of absorption of solar energy flux by the brick wall mass with an absorptivity of 90 percent behind the TIM layer. In the office zones, the magnitude of temperature swings during daytime was reduced, as demonstrated by a 10 to 12h delay in heat transmission from the external faade to the office zones. Such reduction indicates the overheating problems could be reduced potentially by TIapplications.Originalityvalue This research presents the scale and scope of design optimisation of TIsystems with ESPr simulations, which is a critical process prior to applications to real buildings.
Smart and Sustainable Built Environment Market – Emerald Publishing
Published: Nov 23, 2012
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