| Keywords |
Photovoltaic system ; Empirical evaluation ; Energy performance ; Summer season |
| Abstract |
This paper carried out empirical evaluation on generating characteristics and energy performance of 6 kW grid-connected photovoltaic (PV) system in summer season. The PV system was installed to provide power for lighting and appliance of a nursery accommodating about 100 children and teachers. According to the analysis of the monitoring data, average daily solar irradiance was measured to be 5.44, 2.82 and 4.98 kWh/m2 from June to August, respectively. Meanwhile, average daily power generation of the system was computed to be 29.5, 14.3 and 25.8 kWh for each month, and the minimum and maximum values during three months were computed to be 1.2 and 36.4 kWh. Therefore, it is considered the power output of the PV system is closely related to the variation in solar radiation. In addition, it was observed that average daily load-sharing ratio of the system was 24, 4 and 25% in each typical day, and average weekly load-sharing ratio was 32, 15 and 23% in each typical week. Therefore, this results show that grid-connected systems is more suitable than stand-alone system in case of last rainy days during the summer season aside from the advantage that are not necessary to install an expensive battery. |