Efficiency analysis of photovoltaic systems

Ewa Golisz,Szymon Głowacki,Krzysztof Korpysz,Andrzej Bryś,Olga Rutkowska,M Jewiarz

doi:10.1051/e3sconf/202015405003

Ewa Golisz, Szymon Głowacki + Show 4 more

Open Access

https://doi.org/10.1051/e3sconf/202015405003

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Abstract

The goal of the study was to analyse the efficiency of two existing photovoltaic micro-installations with the power of approx. 40 kWp. The main factor differing the two installations being analysed was the arrangement of modules in relation to the sides of the world, one is south-west and the other is east-west. The total yield of electrical energy in 2017 from the south-west installation was higher and amounted to 34980 kWh. For the east-west installation the amount of energy generated was equal to 31180 kWh. 4 methods of forecasting electrical energy yield were discussed. Simple computational method proved to be the best method for both installations.

Highlights

Development of civilization is directly related to the increasing demand for electrical and heat energy
The goal of the present study is to analyse the efficiency of two photovoltaic microinstallations with the power of approx. 40 kWp based on their real production of electrical energy, and to compare the methods for forecasting production of electrical energy by pv installation
The basis of the analyses was real production of electrical energy obtained during the first year of operation of the two installations

Summary

Introduction

Development of civilization is directly related to the increasing demand for electrical and heat energy. Together with the increased demand for energy and the necessity to take care of the environment, large potential of renewable resources of energy including dynamically developing sector of innovative technologies such as photovoltaic cells, heat pumps, solar collectors and electric cars has been noticed [1]. Renewable resources of energy (RRE) are perfect alternative to traditional non-renewable resources of energy. Their reserves are infinite, as they replenish naturally. In Poland, renewable resources of energy covered 11.3% of demand for energy in 2016, and 10.9% in 2017 [2]. In Poland, the estimated share of RRE in the total primary energy used amounts to 46% (technical potential), and RRE share in final energy for 2020 is estimated at 22% (market potential) [4]

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