Abstract
Performance ratio is one of the indicators used to describe the effectiveness of the PV systems. The sustainability of the PV system year after year as well as its reliability can be checked by measuring the performance ratio each year. This indicator will also enable us to carry out a comparison between the performances of different PV systems. In this paper, the performance ratios for five PV systems installed on the roof tops of some of PTUK university buildings have been calculated on monthly and yearly basis. The analysis has been carried out using the available data (energy production and solar irradiation) for the year 2019. It was found that the performance ratio has higher values for May and September in comparison with other months. On the other hand, its lowest values were obtained in winter months. This trend can be observed for all of the PV clusters on the five buildings. When taking into account the overall system, the highest value for the performance ratio was 0.89, which was for September, whereas its lowest value of 0.70 was obtained in January. The performance ratio, which was calculated on yearly basis for the overall system, was found to be 0.80. When considering each building separately, the lowest value was 0.44 for the “Services” building whereas the highest value was 0.94 for the Science building.
Highlights
Measure in productivity terms, the cumulative size of photovoltaic (PV) systems around the world by the end of 2019 was approximately 580.1 GW (IRENA 2020)
The purpose of this study is to evaluate the performance ratio of 5 PV systems recently installed on the rooftops of 5 buildings in Palestine Technical University-Kadoorie (PTUK) University, Palestine
This analysis has been implemented for the whole system as well as for individual buildings, on monthly and yearly basis
Summary
The cumulative size of photovoltaic (PV) systems around the world by the end of 2019 was approximately 580.1 GW (IRENA 2020). Figure (1) shows the trend in the growth of renewable energy sources, including solar systems, during the past 5 years. According to this extended strategy, 80% of the 2030 target will be provided by PV systems (Milhem 2020). The great interest in investing in this type of renewable energy source makes all players in this field (manufacturers, installation companies, and owners) do their best to achieve the maximum energy production. This includes the technologies used in manufacturing the components used to construct the PV systems, the installation design, and efficient operation management
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