{"title":"Influence of the angle of fall of light on the photovoltaic panel and its optimization - literature review","authors":"N. Katrandzhiev, Nikolay Karnobatev","doi":"10.1109/BLJ.2019.8883613","DOIUrl":"https://doi.org/10.1109/BLJ.2019.8883613","url":null,"abstract":"Scarce energy sources in today’s world are the cause of meeting energy needs in everyday life through renewable energy sources. Concerns about climate change, rising oil prices and increased government subsidies lead to enlarged investments in renewable energy sources. Today, research focuses on optimizing and improving efficiency of these sources. Renewable energy is derived from natural processes that are constantly renewed. In most of its forms it is delivered directly from the sun or from the heat accumulated in the earth. The purpose of this publication is to present a realistic approach to enhancing efficiency in cases where green energy is extracted from sun through photovoltaic panels. This would lead to a higher power supply for artificial lighting.There are significant energy losses when installing a solar panel on a static structure in the morning and late afternoon due to the fact that the panel is not sun-oriented in east-west direction (daily sun motion). There are losses also when the solar panel is not perpendicular to sun rays (in north-south direction). This publication presents the influence of the sunlight angle falling on photovoltaics and its optimization.","PeriodicalId":241572,"journal":{"name":"2019 Second Balkan Junior Conference on Lighting (Balkan Light Junior)","volume":"362 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121726406","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Study on the theory of electromagnetic energy propagation through an electromagnetic wave","authors":"N. Nikolov, R. Nikolov, Lachezar Nikolov","doi":"10.1109/BLJ.2019.8883630","DOIUrl":"https://doi.org/10.1109/BLJ.2019.8883630","url":null,"abstract":"The propagation of electromagnetic energy through electromagnetic waves is a complex process. Its theoretical study is based on the fundamental physical scientific laws of conservation of energy and of electrodynamics. The objective of research in the present study is to possibly improve the explanations of composite physical phenomena and to specify their parameters and characteristics.","PeriodicalId":241572,"journal":{"name":"2019 Second Balkan Junior Conference on Lighting (Balkan Light Junior)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121285192","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Computer Investigation of SEPIC DC-DC Converter for LED Lighting Applications","authors":"Gergana Vacheva, N. Hinov, B. Gilev","doi":"10.1109/BLJ.2019.8883661","DOIUrl":"https://doi.org/10.1109/BLJ.2019.8883661","url":null,"abstract":"In the current paper a mathematical modelling of SEPIC DC-DC converter is presented. A methodology with switching function is used. The realized model is implemented in MATLAB/Simulink environment. An optimization procedure for determination of the optimal value for the proposed solution is used. This model is suitable for a LED lighting applications.","PeriodicalId":241572,"journal":{"name":"2019 Second Balkan Junior Conference on Lighting (Balkan Light Junior)","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127297275","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}