magistrsko delo
Anja Urbanija (Author), Slavko Kocijančič (Mentor)

Abstract

Konec 19. stoletja so znanstveniki odkrili, da lahko energijo sonca pretvorijo v električno energijo, in tako se je začela razvijati fotovoltaika, veda, ki proučuje pretvorbo svetlobe v elektriko. Takšno delovanje ne proizvaja nobenih okolju škodljivih plinov, zato sončne celice uvrščamo med čiste vire energije, prav tako pa jih zaradi stalne prisotnosti sončne svetlobe uvrščamo med obnovljive vire. V teoretičnem delu magistrske naloge sta opisani sestava ter delovanje sončne celice. Bralec bo izvedel, kako sončne celice, ki generirajo enosmerno napetost, delujejo v večjih izmeničnih sistemih, ter spoznal vlogo temu namenjenih pretvornikov. V nadaljevanju je definiran izkoristek in opis vpliva naslednjih parametrov: gostota moči sončnega sevanja, temperatura sončnega modula, površina in število med seboj zaporedno in vzporedno povezanih sončnih celic ter vpadni kot sončnih žarkov. Na koncu je predstavljen še njihov vpliv na okolje. V empiričnem delu so predstavljeni rezultati meritev, ki smo jih opravili v šolskem laboratoriju. Z meritvami smo preverili pogoje, pri katerih je izkoristek sončne celice največji, vpliv različnih valovnih dolžin svetlobe ter vpliv vpadnega kota na izkoristek sončne celice. Na podlagi meritev smo pripravili osnutek poteka tehniškega dne, na katerem se učenci seznanijo z alternativnimi viri energije, med katere spadajo tudi sončne celice. V okviru tehniškega dne sta pripravljena pred test in po test za učence ter didaktična priporočila učiteljem za lažjo izvedbo tehniškega dne o sončni elektrarni.

Keywords

raziskovalno učenje;šolski laboratorij;

Data

Language: Slovenian
Year of publishing:
Typology: 2.09 - Master's Thesis
Organization: UL PEF - Faculty of Education
Publisher: [A. Urbanija]
UDC: 62:373.3043.2)
COBISS: 11831113 Link will open in a new window
Views: 697
Downloads: 119
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Other data

Secondary language: English
Secondary title: The lesson plan for middle school technology activity day on efficiency of solar cells
Secondary abstract: The paper focuses on the conversion of light into electricity and presents the lesson plan for a middle school technology activity day on the efficiency of solar cells. In the theoretical part of the paper, the structure and functioning of the photovoltaic cells are discussed. The first part of the paper also explains how the photovoltaic cells which generate direct current function in larger systems. In the theoretical part of the paper, also includes a chapter which analyses the function of current transducers /converters. The issue of the efficiency of photovoltaic cells and the influence of the parameters, such as: the density of solar radiation, the temperature of the photovoltaic panel, the illumination angle, the size of the surface and the number of solar cells that have parallel and serial bonds, are addressed as well in this chapter. At the end of the theoretical part, the influence of the photovoltaic cells on the environment is also presented. The empirical part of the thesis is dedicated to the analyses of the results of the measurements, which were carried out in the laboratory of the Faculty of Education, and the lesson plan for a middle school technology activity day. With the measurements, we analyzed the influence of different wavelengths of radiation and the illumination angle on the amount of the produced electricity and thus the efficiency of the photovoltaic cells under different circumstances. The results helped us to make a draft of the lesson plan for a middle school technology activity day on the efficiency of solar cells, keeping in mind that the main aim of the of the technology activity day is to inform the students about the alternative and clean sources of energy, such as solar power. The pre- and post- tests, and educational recommendations were also prepared in order to help the teachers to carry out the technology activity day on the efficiency of solar cells.
Secondary keywords: primary education;engineering;osnovnošolski pouk;tehnika;
File type: application/pdf
Type (COBISS): Master's thesis/paper
Thesis comment: Univ. v Ljubljani, Pedagoška fak.
Pages: IV, 59 str.
ID: 10881415