Rooftop photovoltaic (PV) system is a common utilization of renewable energy in Guangzhou with considerable energy saving potential, which not only produces electricity but also has an impact on building energy consumption system. There are still deficiencies in models for quickly assessing the energy saving potential for rooftop PV system, which makes it more difficult for architects to determine the installed area of rooftop PV in the design stage. This article, therefore, aims to establish the energy saving potential model of a typical office building Rooftop PV system in Guangzhou through experiment and simulation. The results revealed that the most energy-saving potential of the rooftop PV system comes from its electricity generation capacity. Especially for high-rise buildings with high-performance air conditioning systems, the impact of the rooftop PV system on the building HVAC energy consumption is almost negligible.
Keywords rooftop PV system, impact on the building energy consumption, electricity generation, energy saving potential model