Thermal Loss Reduction Using a Ventilated Double-Glazed Window for Commercial Buildings in Average-Climate Environments

The power consumption of buildings is exacerbated in modern societies. The most effective load in buildings is heating and cooling systems. Numerous studies have been done on energy saving for buildings recently. Windows are one of the most thermal loads that cause the loss of heat from inside to outside a room during winter. This paper demonstrates an alternative insight into the use of double glazed windows in average climate environments. The proposed system uses an air inject system to impact the heat transfer properties of the window considering the trade-off between the heating load energy saving and air injection power consumption. The theoretical analysis showed a reduction of 52 % in the thermal loss of the window, in addition to a declination in the heat transfer coefficient of the window from 3.5 to 1.8 W/m2K. Consequently, an energy saving of 19 % in the heating capacity has been achieved.