Impact of Glass Window to Heat Load in Office Building in Different Climates

The process of urbanization with the social and economic development in countries, the large and very large building are increasingly serving for administrative, office, commercial, and residential. Nowadays, buildings oriented to meet the aesthetic requirements, also the convenience and fast construction, the covering structure of these buildings is mostly glass. The experiment of heating and cooling loads of reference room has been conducted through the Japanese program for PC Heat load DACCS HkGS (Daikin) with embedded climate data. The raising of thermal load in reference room gets more impact from the values of WWR than the types of glass. In details, the cooling load of reference room increases 35% in Moscow and 40% in Hanoi when raising the WWR. The results show that, the window is a main impact of thermal load of office building with each typical climate. For the window characteristics in the building, the WWR take more impact to the thermal load than the type of glass. Therefore, the using of window into the facade is a major challenger to in the design of high-rise building when balance the aesthetics and energy consumption in the building.