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1.
Static model of temperature distribution in a photovoltaic module
Klemen Sredenšek, Sebastijan Seme, Gorazd Hren, 2021, izvirni znanstveni članek

Opis: The primary objective of this paper is to present a static model for calculating the temperature distribution in a photovoltaic module using the finite element method. The paper presents in more detail the theoretical background of solar radiation, heat transfer, and the finite element method. The results of the static model are evaluated using temperature measurements of a photovoltaic model, which were performed at the Institute of Energy Technology, Faculty of Energy Technology, University of Maribor. The results of the regression analysis show a good concurrence between the measured and modelled values of the temperature of the photovoltaic module, especially on days with a higher share of the direct component of solar radiation.
Ključne besede: photovoltaic module, temperature distribution, heat transfer, finite element method
Objavljeno v DKUM: 13.11.2023; Ogledov: 125; Prenosov: 5
.pdf Celotno besedilo (2,01 MB)
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2.
Experimental validation of a thermo-electric model of the photovoltaic module under outdoor conditions
Klemen Sredenšek, Bojan Štumberger, Miralem Hadžiselimović, Sebastijan Seme, Klemen Deželak, 2021, izvirni znanstveni članek

Opis: An operating temperature of the photovoltaic (PV) module greatly affects performance and its lifetime. Therefore, it is essential to evaluate operating temperature of the photovoltaic module in different weather conditions and how it affects its performance. The primary objective of this paper is to present a dynamic thermo-electric model for determining the temperature and output power of the photovoltaic module. The presented model is validated with field measurement at the Institute of Energy Technology, Faculty of Energy Technology, University of Maribor, Slovenia. The presented model was compared with other models in different weather conditions, such as clear, cloudy and overcast. The evaluation was performed for the operating temperature and output power of the photovoltaic module using Root-Mean-Square-Error (RMSE) and Mean-Absolute-Error (MAE). The average RMSE and MAE values are 1.75C and 1.14C for the thermal part and 20.34 W and 10.97 W for the electrical part.
Ključne besede: dynamic modeling, thermo-electric model, accuracy, measuring device, temperature, output power, PV module
Objavljeno v DKUM: 13.11.2023; Ogledov: 203; Prenosov: 11
.pdf Celotno besedilo (9,51 MB)
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3.
Some functional equations in banach algebras and an application
Joso Vukman, 1987, izvirni znanstveni članek

Opis: V članku so dokazani rezultati o neki funkcionalni enačbi v kompleksni Banachovi algebri. Eden teh rezultatov je uporabljen pri dokazu abstraktne posplošitve Jordan-Neumannove karakterizacije predhilbertovega prostora.
Ključne besede: matematika, funkcionalna analiza, Banachova algebra, Banachova ▫$ast$▫-algebra, vektorski prostor, modul, aditivna funkcija, avtomorfizem, antiavtomorfizem, prehilbertov prostor, mathematics, functional analysis, Banach algebra, Banach ▫$ast$▫-algebra, vector space, module, additive functions, automorphism, antiautomorphism, pre-Hilbert space
Objavljeno v DKUM: 10.07.2015; Ogledov: 1218; Prenosov: 92
URL Povezava na celotno besedilo

4.
Determining energy production of CdTe photovoltaic system
Jan Šlamberger, Peter Virtič, 2013, izvirni znanstveni članek

Opis: This paper presents a method for determining energy production of Cadmium-Telluride photovoltaic system, which has a different working performance than the most used Silicon photovoltaic systems. The main difference is sensitivity to the temperature and the solar irradiance. The CdTe cells are less sensitive to the temperature and in contrast to the Si Cells they have a higher efficiency at lower irradiance.
Ključne besede: photovoltaic module, energy production, annual energy yield, Cadmium-Telluride
Objavljeno v DKUM: 10.07.2015; Ogledov: 1744; Prenosov: 69
URL Povezava na celotno besedilo

5.
Relaxing LMI Domination Matricially
Igor Klep, 2010, objavljeni povzetek znanstvenega prispevka na konferenci

Ključne besede: linear matrix inequality (LMI), completely positive, semidefinite programming, Positivstellensatz, Gleichstellensatz, archimedean quadratic module, free positivity
Objavljeno v DKUM: 10.07.2015; Ogledov: 1067; Prenosov: 45
URL Povezava na celotno besedilo

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