Abstract
Solar irradiation is one of the important parameters that should be taken into consideration for the design and utilization of a photovoltaic system. Usually, the input parameters of a photovoltaic system are solar irradiation, the ambient environment temperature and the wind speed, and as a consequence most photovoltaic systems are equipped with sensors for measuring these parameters. This paper presents several mathematical models for solar irradiation assessment. The starting point is represented by the mathematical model of extraterrestrial irradiation, and resulting finally in the model for solar irradiation, absorbed by a low concentration photovoltaic panel. These estimating models of solar irradiation have been particularized for the Craiova, Romania, and have been verified through numerical simulation. Regarding terrestrial solar irradiation, four mathematical models have been adopted, namely Adnot, Haurwitz, Kasten and Empirical (EIM). Of these, the most appropriate for the Craiova location were the models Adnot and Empirical. Consequently, for the calculation of the solar irradiation absorbed by the photovoltaic (PV) panels with low concentration, these models have been taken into consideration. In this study, a comparative analysis was also carried out with respect to the solar irradiation absorbed by the PV panels without concentration and those with collectedness of the solar radiation. This analysis was based on the results of numerical simulation and experimental tests.
Highlights
IntroductionBecause of pollution and awareness of limited resources of fossil fuels, renewable sources of energy production gained increasing confidence as an appropriate solution for humankind
Over the last decades, because of pollution and awareness of limited resources of fossil fuels, renewable sources of energy production gained increasing confidence as an appropriate solution for humankind.Within the southern region of Romania, due to the high solar potential, numerous photovoltaic stations have been developed
This paper presents some of the existing models in the literature in order to address meaningfully solar irradiation assessment
Summary
Because of pollution and awareness of limited resources of fossil fuels, renewable sources of energy production gained increasing confidence as an appropriate solution for humankind. Within the southern region of Romania, due to the high solar potential, numerous photovoltaic stations have been developed. This paper is the starting work for a study that aims to address meaningfully the issues of increasing efficiency of photovoltaic systems with the utilization of solar radiation concentrator elements, as well as reducing of costly photovoltaic surface. Aspects of solar radiation properties should be known [1,2], as well as aspects regarding astronomical data [3]. Regarding the calculation of solar irradiation absorbed by a low concentration photovoltaic panel (LCPV), in the literature [4,5,6,7,8], these aspects are approached, but with values and particularities for certain locations submitted to study
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