Operation strategies for an office building integrated with multi-story double skin facades in the heating season

In this paper, heating energy saving strategies for winter are proposed for office buildings with a multi-story double skin façade. Based on a model that was validated with measured data, two alternative operation strategies were analyzed. A model that introduces heated air in the cavity to the indoors by openable windows control(Case 2) and a model that combines it with HVAC by using a cavity as a preheating space(Case 3) were compared with the conventional model(Case 1). The results of the comparison showed that the Case 2 and 3 reduced the heating energy by about 3.4 and 37.9 % respectively.