Study on the Impact of Design Parameters of Photovoltaic Com-Bined Vacuum Glazing (PVCVG) on the Energy Consumption of Residential Buildings in Lhasa

Synergistic active-passive utilization of solar energy in buildings plays an important role in achieving nearly zero energy buildings. Building-integrated photovoltaic (BIPV) is a crucial initiative to reduce heating energy consumption, especially in cold climate zones with abundant solar radiation. However, few studies have examined the impact of design parameter of photovoltaic combined vacuum glazing (PVCVG) on building energy efficiency. This study assessed the energy performance of Several typical Win-dows and PVCVG with various Window-to-Wall Ratio (WWR) design conditions in residential buildings in Lhasa, and investigated how the WWR and orientation of PVCVG influence energy consumption by DesignBuilder software. The findings indi-cate that PVCVG exhibits great energy-saving potential in Lhasa, with both orientation and WWR of PVCVG substantially affecting energy consumption. Specifically, When the south-facing WWR > 40%, the energy generated by the three kinds of PV Windows can meet the building's requirements. the optimal orientation for PVCVG is southward, followed by east and west orientations. PVCVG reaches optimal energy satisfaction when the South WWR is 85%. This study is expected to provide useful information for improving the energy use efficiency in cold climate zones with abundant solar radiation and promoting sustainable building development.