In order to conserve energy and create acomfortable climate for both passengers andworkers at a new large international airportin Thailand, a design concept was createdwhere only the first 2m above the occupiedzone is conditioned. The temperature of theair outside of this area is allowed to riseabove normal conditions. The idea was tolet this temperature rise so that it was eitherequal to or higher than the outdoortemperature, thus reducing heat gain.Computer simulation programs were used todefine parameters for the CF'D program.Once the boundary conditions were defined,the process of design analysis began. Thispaper will outline the steps taken to set upthe CF'D program. Secondly, the explorationtaken to obtain an optimal climate, andthirdly, how the many results were used toexplain to both fellow engineers and thearchitects what had been achieved. Theconclusion of this analysis was the design ofspecial supply air grilles to meet the designcriteria.
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