Riyadh - School of Architecture
Riyadh - School of Architecture
Riyadh - School of Architecture
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Climatic Strategies (Controlled Ventilation)Wind Tower and Underground Cooling-Hybrid Passive and Active StrategyWind Tower system comes fromIranian ‘badgir’ which air is takenfrom 8m high tower to basementthrough a labyrinth, where air reducespeed, cools down by earth thermalmass and deposit much <strong>of</strong> the dust.this is then treated by industrial-typewater cooler to further enhancethe effect before delivery. Even highstandard clinical area is half-naturalventilated in this way.This reduce air temperatureby 10C and 70% cost <strong>of</strong>conventional ACLam Long Tat 1155009617 Page3 <strong>of</strong> 3ImprovementOptimal Orientation suggested by Weather ToolPotential to extend comfort zone by diff. passive strategiesInadequate wall thickness to have effective thermal mass1/ Building OrientationBuilding currently orient withlong side facing E-W, this significantlyincrease exposure tolow-angle sun. From Ecotectweather tool analysis, Optimumorientation <strong>of</strong> buildingshould face 187.5 o . At least itshould face the N-S.2/ Other Passive StrategyCurrently only natural ventilationand heat avoidance isutilized. More extensive use <strong>of</strong>evaporative cooling in hot day,passive solar heating in coldday can be done to extend thethermal zone on the lower leftand right where ventilationdoes not cover3/ Thermal MassAlthough the building is currentlyusing masonry structure,the wall thickness is notoptimise to make a effectivethermal mass. Given that theclinic operate 24hrs, it is importantto keep the spacewarm in night-time too. Accordingto a guideline for Australia,min. thickness has to be300mm to be effective.4/ Compact VolumeAlthough the design claim totake reference to Arabic courtyardhouse, the proportion <strong>of</strong>internal space does not workin the way a <strong>of</strong> a climaticallyfunctional courtyard. It is tooopen too do any shading orcreate usable outdoor spacewith mitigated micro-climate(only the playground performbetter)Annual Accumulative Thermal Load on diff. Face <strong>of</strong> buildingWind Tunnel Test at Prevailing NE direction