Abstract
A sustainable college building with 2 solar chimneys was completed in the Spring of 2004. Since then, authors have continued to measure natural ventilation rate using SF6 and C2H4 as tracer gases to know those of class rooms and whole building. At the same time, thermal conditions, air flow directions and pressure differences were also measured.Based on these data, multi rooms ventilation calculation models were developed, by which effects of some improvements for chimney systems were examined. At the next step, the authors have developed heat balance simulation model around chimney, which showed good accordance with measured values and adequate heat capacities of construction materials were studied to get constant ventilation rate through a day.
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