The effect of slat angle of windows with venetian blinds on heating and cooling loads of buildings in South Korea

The effect of slat angle and absorptance on the heating and cooling loads of buildings in Seoul (South Korea) has been studied. An analytical model of a window system with venetian blinds is developed and validated with published experimental data. The validated model has been successfully incorporated into the TRNSYS computer program. Hour-by-hour heating/cooling loads of a typical building, with and without venetian blinds, are compared. Results show that the use of windows with venetian blinds can reduce the building heating load by about 5% and cooling loads by as much as 30%.