Saturday, April 26, 2014

ABDUL HAKIM

DAYLIGHTING IN ALGERIAN CLASS ROOM

Daylight quality and quantity in Algeria schools shows an urgent condition to ensure visual comfort for students and teachers. Some problems arise due to poor window design and excessive amounts of daylight penetration inside the classrooms as well as non-uniform daylight, which may cause glare and heat gain. This study aimed at choosing an ideal window size and glazing pattern to maximize daylight effectiveness and occupant comfort in Algerian schools. Field measurements of selected classroom were carried out in selected school in Algeria during summer and winter season. The data were analysed and used to develop model design for simulation. Seven patterns of glazing windows design were used for extensive simulation exercise. The results of the investigation from the site measurements show that WWR was more than 40%; the WPI was found to be within the range of 300lux to 500lux and the DF of 4%, which exceed reference value except the southeast orientation 2.98% in morning and 2.29% in the evening. Result from simulation using IES by comparing three different glazing types (tint, clear and reflective) and using different  glazing size from 25% to 75% in winter season (under overcast sky condition) and summer season (under intermediate sky condition). The evidence from this study suggests that tinted windows in both winter and summer is ideal as the simulations result shows that significant usable area of (31.22% - 41.74%) is achievable in a bilateral window opening with a (DF<2 25="" 300lux="" 30="" 500lux.="" 50="" 75="" a="" adequate="" algeria="" and="" as="" be="" bilateral="" by="" configurations="" daylight="" daylighting.="" design="" different="" during="" enhancement="" experiment="" for="" from="" further="" glass="" glazing="" has="" ideal="" impact="" improve="" in="" increasing="" it="" louvers="" need="" of="" overhangs.="" percentage="" public="" quality="" quantity="" range="" research="" result="" school="" schools="" shelves="" significant="" span="" steaming="" suggest="" that="" the="" tinted="" to="" unobtainable="" use="" variations="" vt="" was="" with="" within="" would="" wpi="" wwr="" yield="">



Daylight quality and quantity in Algeria schools shows an urgent condition to ensure visual comfort for students and teachers. Some problems arise due to poor window design and excessive amounts of daylight penetration inside the classrooms as well as non-uniform daylight, which may cause glare and heat gain. This study aimed at choosing an ideal window size and glazing pattern to maximize daylight effectiveness and occupant comfort in Algerian schools. Field measurements of selected classroom were carried out in selected school in Algeria during summer and winter season. The data were analysed and used to develop model design for simulation. Seven patterns of glazing windows design were used for extensive simulation exercise. The results of the investigation from the site measurements show that WWR was more than 40%; the WPI was found to be within the range of 300lux to 500lux and the DF of 4%, which exceed reference value except the southeast orientation 2.98% in morning and 2.29% in the evening. Result from simulation using IES by comparing three different glazing types (tint, clear and reflective) and using different  glazing size from 25% to 75% in winter season (under overcast sky condition) and summer season (under intermediate sky condition). The evidence from this study suggests that tinted windows in both winter and summer is ideal as the simulations result shows that significant usable area of (31.22% - 41.74%) is achievable in a bilateral window opening with a (DF<2 25="" 300lux="" 30="" 500lux.="" 50="" 75="" a="" adequate="" algeria="" and="" as="" be="" bilateral="" by="" configurations="" daylight="" daylighting.="" design="" different="" during="" enhancement="" experiment="" for="" from="" further="" glass="" glazing="" has="" ideal="" impact="" improve="" in="" increasing="" it="" louvers="" need="" of="" overhangs.="" percentage="" public="" quality="" quantity="" range="" research="" result="" school="" schools="" shelves="" significant="" span="" steaming="" suggest="" that="" the="" tinted="" to="" unobtainable="" use="" variations="" vt="" was="" with="" within="" would="" wpi="" wwr="" yield="">

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