Cooling of buildings is an essential target for engineers and builders in the hot arid climate
of Egypt. New cooling system was integrated into a single room built in Assiut
University (El-Gorib site) in Assiut, Egypt. A passive cooling technique was integrated
inside a short wind tower made from expanded paper (wet pad) 0.1 m thick. A water
tube was installed on the top of the expanded paper with small nozzles. The results
show that outlet air temperature from the wind tower is 27.3°C. The calculated predicted
mean vote (PMV) is within the recommended range (−0.5 < PMV < +0.5). This indicates
that occupants remain satisfied with indoor thermal environment after using the passive
cooling system and the difference is nearly 6–7 K between outdoor and indoor. The
system achieves the acceptable airflow rate with an average of 450 ppm for CO2
concentration during daytime. The relative humidity did not exceed 57% most of the time.
The maximum airspeed inside the solar chimney was 3.5 m/s under the effect of a high
solar radiation of 890 W/m2 . The findings show that solar chimney with passive cooling
tower design (SCPC) system achieves comfortable thermal conditions with a significant
improvement in building energy conservation