黑料不打烊

Baigiamajame magistro darbe nagrin臈jama atspind啪io koeficiento priklausomyb臈 nuo 拧viesos bangos ilgio esant skirtingai kristalinio silicio tekst奴ruoto pavir拧iaus morfologijai. Pirmoje dalyje atlikta mokslin臈s literat奴ros analiz臈, apr臈pianti energetikos potencial膮, saul臈s element懦 raid膮 bei modeliavimo programos. Antroje dalyje apra拧ytos modeliavimo programos OPAL2 ir Wafer ray tracer. Tre膷ioje dalyje pateikiami modeliavimo rezultatai. Ma啪inant tekst奴ruoto silicio pavir拧iaus pagrindo kamp膮 拧viesos atspindys padid臈ja ir esant neatspindin膷iai dangai, ir jai nesant, o tai lemia sugeneruotos srov臈s tankio suma啪臈jim膮. I拧analizavus modeliavimo rezultatus, pateikiamos baigiamojo darbo i拧vados. Darb膮 sudaro 6 dalys: 漠vadas, literat奴ros ap啪valga, metodika, tyrim懦 rezultatai, i拧vados, literat奴ros s膮ra拧as. Darbo apimtis 鈥� 74 p. teksto be pried懦, 44 iliustr., 5 lent., 48 bibliografiniai 拧altiniai.

In final master thesis, the light reflectance as function of the wavelength was analyzed for the different textured surface morphology of the crystalline silicon. Chapter 1 revises the scientific literature used. It provides analysis of an energy potential, review of the solar cell developments, and brief description of the modeling programs. Chapter 2 describes the simulation programs OPAL2 and Wafer ray tracer. Chapter 3 describes the results of the modeling. The reflection losses increases with decreasing facet angle of the surface texture for crystalline silicon with or without antireflection coating, in results decrease of generated current density. After analyzing the results of the modeling, the conclusions of the final thesis are presented. Thesis structure: introduction, review of literature, methodology, results of the modeling, conclusions and references. Thesis consist of 74 p. text without annexes, 44 pictures, 5 tables, 48 bibliographical entries.

Darbas apie minimalius pavir拧ius

About minimal surfaces

Baigiamajame magistro darbe i拧nagrin臈ta mokslin臈 literat奴ra, kurioje apra拧omi nuolatiniai ir blykstiniai 拧viesos 拧altiniai. I拧nagrin臈tos 拧viesos 拧altini懦 taikymo fotovoltini懦 moduli懦 generavimo charakterisstikoms tirti galimyb臈s. Baigiamajame darbe pateikta fotovoltinio modulio charakteristik懦, naudojant dirbtinius 拧viesos 拧altinius, nustatymo metodika ir 寞ranga. Baigiamajam darbui parengti, atlikti fotovoltinio modulio parametr懦 matavimai naudojant skirtingus dirbtinius 拧viesos 拧altinius: saul臈s spektro simuliatori懦 ir lazer寞, siekiant 寞vertinti skirting懦 拧viesos 拧altini懦 poveik寞 寞vairiems saul臈s elementams. I拧nagrin臈ti fotovoltinio modulio charakteristik懦 poky膷iai ir juos lemen膷ios prie啪astys laboratorin臈mis s膮lygomis. Baigiamojo darbo metu atlikti tyrimai pristatyti Berlyne, Helmholtz 鈥� Zentrum Berlin f眉r Materialien und Energie institute rengtoje konferencijoje. Atlikus teorin臋 ir praktin臋 baigiamojo darbo analiz臋, pateikiamos baigiamojo darbo i拧vados ir rekomendacijos. Darb膮 sudaro 6 dalys: 寞vadas, literat奴ros ap啪valga, ekperimentini懦 tyrim懦 metodika, eksperimentini懦 tyrim懦 rezultat懦 analiz臈 i拧vados ir rekomendacijos, literat奴ros s膮ra拧as. Darbo apimtis 鈥� 64 p. teksto be pried懦, 51 iliustr., 7 lent., 40 bibliografiniai 拧altiniai.

In the final masters thesis, scientific literature is reviewed, which describes psteady state and flash sources of light. Determined application of light sources for the study of photovoltaic modules power generation characteristics. In the final masters thesis methodology and equipment for photovoltaic modules parameters determination using artificial light sources is presented. For the final work, measurements of photovoltaic module parameters using different artificial light sources: solar spectrum simulator and laser are used to estimate the influence of different light sources on various solar cells. Research of the final thesis was presented at a conference held at Helmholtz 鈥� Zentrum Berlin f眉r Materialien und Energie in Berlin. Analysis for changes in the characteristics of the photovoltaic module and their causes in laboratory conditions was made. After theoretical and practical analysis of the final work, conclusions and recommendations of the final thesis are presented. Structure: introduction, literature review, experimental research methodology, analysis of experimental results conclusions and suggestions, references. Thesis consist of: 64 p. text without appendixes, 51 pictures, 7 tables, 40 bibliographical entries.

Baigiamajame darbe tirti 寞vair奴s saul臈s elementai ir j懦 generuojamos elektrin臈s galios priklausomyb臈 nuo energin臈s ap拧vietos. Naudojant skenuojant寞 elektron懦 mikroskop膮 i拧tirti ir palyginti monokristalinio ir polikristalinio saul臈s element懦 pavir拧iai. Sumontuota saul臈s element懦 tyrim懦 寞ranga. I拧tirtos monokristalinio ir polikristalinio saul臈s element懦 galios priklausomyb臈s, kei膷iant krintan膷ios 拧viesos kamp膮 bei p-n sand奴ros vidin寞 elektrin寞 lauk膮 valdant i拧orinio elektrinio 拧altinio 寞迟补尘辫补. Atlikta eksperimentini懦 rezultat懦 palyginamoji analiz臈. Gauti tyrim懦 rezultatai gali b奴ti panaudoti optimizuojant fotoelektrini懦 j臈gaini懦 darb膮 ar valdant ja generuojam膮 gali膮, priklausomai nuo momentinio energijos poreikio. I拧nagrin臈jus teorinius bei eksperimentinius tyrim懦 rezultatus, pateiktos baigiamojo darbo i拧vados bei rekomendacijos. Darb膮 sudaro 6 dalys: 寞vadas, literat奴ros ap啪valga, tyrim懦 metodika, tyrim懦 rezultatai, i拧vados, literat奴ros s膮ra拧as. Darbo apimtis - 45 p. teksto, 21 iliustr., 2 lent., 17 bibliografini懦 拧altini懦.

This master thesis represents results of investigation of PV power of various solar cells vs. intensity and angle of incidence of white light irradiation. Scanning electron microscope was used to investigate the quality of surfaces of monocrystalline and policrystalline solar cells. Using original experimental setup optoelectronic properties of the dc biased monocrystalline and policrystalline were measured and results of these measurments were analyzed and disscussed. The results of these investigations, conclusions and recommendations might be used by the PV power users for optimisation of regime of operation of their PV plants. Structure of thesis: introductory part, review of subject related publications, methods of research, results, conclusions and list of references. Thesis consist of: 45 pages of text, 21 figures, 2 tables, 17 bibliographical entries.

Baigiamajame magistro darbe atlikta fotoelektros technologij懦 mokslin臈s literat奴ros analiz臈. I拧nagrin臈ti 1 MW galios poreik寞 tenkinantys fotovoltin臈s elektrin臈s 寞rengimo principai bei atlikta pagrindini懦 fotovoltini懦 element懦 parametr懦 analiz臈. Baigiamajame darbe i拧nagrin臈ti pagrindiniai aspektai: elektros suvartojimo profilis, keitikli懦 apkrovos ir simuliacij懦 palyginimas, kuriais remiantis galimas efektyvios fotovoltin臈s elektrin臈s projektavimas ir 寞rengimas. Baigiamajame darbe pateikta maksimalios galios nustatymo, 拧lapios modulio izoliacijos var啪os, moduli懦 elektroliuminescencijos spektr懦 registravimo tyrim懦 metodika. Atlikta fotovoltini懦 moduli懦 charakteristik懦 nustatymo tyrim懦 rezultat懦 analiz臈 bei modeliavimo palyginimas, vertinant tinkamiausi膮 nuolatin臈s ir kintamosios srovi懦 santyk寞. I拧nagrin臈jus teorinius ir praktinius darbo aspektus, pateikiamos baigiamojo darbo i拧vados ir rekomendacijos. Darb膮 sudaro 拧e拧ios dalys: 寞vadas, literat奴ros ap啪valga, modeliavimo programin臈s 寞rangos, ir tyrimo metodikos ap啪valga, praktinis elektrin臈s k奴rimo ir tyrimo rezultat懦 apibendrinimas, i拧vados ir rekomendacijos, literat奴ros s膮ra拧as. Darbo apimtis 鈥� 72 p. teksto be pried懦, 55 iliustr., 14 lent., 45 bibliografiniai 拧altiniai.

In the final Master's thesis photoelectric technology scientific literature analysis was carried out. The principles of 1 MW photovoltaic plant installation and analysis of photovoltaic modules parameters have been analyzed. Main aspects are analyzed: power consumption profile, inverter load and simulation comparisons, which allows efficient photovoltaic power plant design and installation. In the final work, the methodology for determining photovoltaic modules maximum power, wet module isolation impedance, modules electroluminescence specter registration was presented. The results analysis of determining the characteristics of photovoltaic modules was carried out and a simulation comparison was made for the most suitable DC/AC ratio. After examining theoretical and practical aspects of the thesis, conclusions and recommendations are presented. Structure:: introduction, literature review, simulation software, and survey methodology overview, practical summary of the development of the power plant and the results of the research, conclusions and recommendations, references. Thesis consist of: 72 p. text without appendixes, 55 pictures, 14 tables, 45 bibliographical entries.

Baigiamajame magistro darbe tiriamos monokristalini懦 ir polikristalini懦 saul臈s moduli懦 惫辞濒迟补尘辫别谤颈苍臈s charakteristikos. Ap啪velgta mokslin臈 literat奴ra apie saul臈s moduli懦 voltamperini懦 charakteristik懦 tyrimus. Naudojantis saul臈s 拧viesos imitatoriumi i拧matuotos ir pavaizduotos saul臈s moduli懦 惫辞濒迟补尘辫别谤颈苍臈s charakteristikos. I拧tirti maksimalios galios, atvirosios grandin臈s 寞tampos, trumpojo jungimo srov臈s ir 寞tampos bei srov臈s, esant maksimaliai galiai, parametr懦 poky膷iai esant skirtingoms energin臈ms ap拧vietoms. Atlikta eksperimentini懦 rezultat懦 palyginamoji analiz臈, i拧nagrin臈ti parametr懦 skirtumai ir prie啪astys. Nustatyta darbo praktin臈 vert臈 fotovoltini懦 sistem懦 k奴rimui, turint VACh parametrus. I拧nagrin臈jus teorinius bei eksperimentinius tyrimo rezultatus, pateiktos baigiamojo darbo i拧vados bei rekomendacijos. Darb膮 sudaro 6 dalys: 寞vadas, literat奴ros ap啪valga, darbo metodika, bandym懦 eiga bei pagrindiniai rezultatai, i拧vados ir literat奴ros s膮ra拧as. Darbo apimtis 鈥� 42 p. teksto be pried懦, 24 iliustr., 9 lentel臈s, 21 bibliografinis 拧altinis.

Monocrystalline and polycrystalline solar panels voltage characteristics are investigated in the final master's thesis. An overview of scientific literature was made on the research of solar panels voltage characteristics. Using the solar simulator, the voltage characteristics of the solar panels were measured and shown. Changes were investigated at different energy illumination in the parameters of maximum power, open circuit voltage, short circuit current and voltage and current at maximum power. A comparative analysis of experimental results was carried out, parameters differences and causes were analyzed. The practical value of the work was determined for the development of photovoltaic systems with VACh parameters. After examining theoretical and experimental results of the research, the conclusions and recommendations of the final thesis are presented. Structure: introduction, literature review, methodology of work, test progress and main results, conclusions and references. Thesis consists of: 42 p. text without appendixes, 24 pictures, 9 tables, 21 bibliographical entries.

xasdsa

asdasd

Baigiamajame magistro darbe nagrin臈jami anomaliai auk拧tos 寞tampos dariniai, j懦 k奴rimo s膮lygos, charakteristikos. Pagal darbo u啪duoties duomenis parinkta tyrimo metodika bei eiga. I拧matuotos u啪garint懦 darini懦 惫辞濒迟补尘辫别谤颈苍臈s charakteristikos. I拧analizuota, kaip kei膷iasi darinio var啪a ir 拧viesa indukuota 寞迟补尘辫补, did臈jant germanio sluoksnio storiui: ma啪臈jant med啪iagos storio sluoksniui did臈ja foto寞迟补尘辫补. Anomaliai dideli懦 foto寞tampos ver膷i懦 negauta, tik keli懦 de拧im膷i懦 mikrovolt懦 eil臈s. Skenuojan膷iu elektroniniu mikroskopu i拧tirtos darini懦 pavir拧in臈s strukt奴ros galimai paai拧kinan膷ios anomaliai dideli懦 foto寞tampos ver膷i懦 nebuvim膮. Darb膮 sudaro 拧ios dalys: 寞vadas, anomaliai didel臈s 寞tampos fotoelementai, anomaliai didel臈s 寞tampos fotovoltini懦 element懦 tyrimo metodika, fotovoltini懦 element懦 tyrimo rezultatai anomaliai didel臈s 寞tampos beie拧kant, i拧vados ir rekomendacijos, literat奴ros s膮ra拧as. Darbo apimtis 鈥� 33 p. teksto be pried懦, 30 iliustr., 4 lent., 16 bibliografiniai 拧altiniai. Atskirai pridedami darbo priedai.

In master鈥檚 thesis are examined formations of anomalous high voltage, creating conditions of them, and characteristics. Examined technology of thermal evaporation. According to the tasks of the thesis, methodics and course of experiment were determined. Measured vaporized derivatives of volt-ampere characteristics. Were analyzed, how resistivity of derivative are changing, while layer of germanium being bigger: while material's layer getting smaller, the photo voltage is getting bigger. Anomalous high photo voltage values were not get, only several dozens of series of microvolts. Surface structures of derivatives were examined聽 by scanning electron microscope, which possibly can clarify absence of anomalous high photo voltage. Structure: introduction, anomalous high photovoltaic cells, materials and methods used in research, results and conclusions, references. Thesis consist of: 33 p. text without appendixes, 3 pictures, 4 tables, 16 bibliographical entries.

Baigiamajame magistro darbe nagrin臈jamas defektus turin膷i懦 saul臈s element懦 bei fotoelektrini懦 moduli懦 naudingumas jiems pakliuvus 寞 pilnojo ar dalinio 拧e拧臈lio zon膮. I拧tirta saul臈s element懦, pakliuvusi懦 寞 pilnojo ir dalinio 拧e拧臈lio zon膮, elektrini懦 savybi懦 priklausomyb臈 nuo 拧e拧臈lio gylio ir formos. I拧tirta saul臈s elemento, esan膷io 拧e拧臈lio zonoje, naudingumo priklausomyb臈 nuo 寞 j寞 kritusios elektromagnetin臈s bangos intensyvumo. Nustatyta, kad saul臈s elemento generuojama fotoelektros galia atvirk拧膷iai proporcinga pilnojo 拧e拧臈lio ploto daliai. I拧siai拧kinta, kad fotoelektrinio modulio, pagaminto i拧 lygiagre膷iai tarpusavyje sujungt懦 defektus turin膷i懦 saul臈s element懦, naudingumas priklauso nuo 拧e拧臈lio zonos ploto, bet nepriklauso nuo zonos konfig奴racijos. Prie拧ingai 鈥� nuosekliai tarpusavyje fotoelektriniame modulyje sujungt懦 defektus turin膷i懦 saul臈s element懦 naudingumui 拧e拧臈lio zonos konfig奴racija turi reik拧m臈s. Nustatyta, jog polikristalinio silicio saul臈s elemento konversijos naudingumas nepriklauso nuo 拧e拧臈lio zonos formos. I拧tirta, kad dalinio 拧e拧臈lio atveju, polikristalinio saul臈s elemento generuojama galia suma啪臈ja proporcingai 拧viesos intensyvumo poky膷iui 拧e拧臈lio zonoje. Darb膮 sudaro 6 dalys: 寞vadas, literat奴ros analiz臈, metodika, i拧vados ir pasi奴lymai, literat奴ros s膮ra拧as. Darbo apimtis 鈥� 53 p. teksto be pried懦, 44 iliustr., 9 lent., 34 bibliografiniai 拧altiniai.

The converssion efficiency of defects containing solar cells and panels under shading conditions was investigated in this final master degree thesis. It was found the correlations between solar cells electric properties and shadow depth and form. The efficiency dependence of solar cell under partial shading was investigated considering the features of electromagnetic wave. It was find out that electric power, produced by solar cell, is reverse proportional to whole shaded area. Also it was estabilished that photovoltaic module, which is made of parallel connected defects containing solar cells, efficiency depends on shadow zone area, however it do not depend on zone configuration. On the contrary, shadow zone configuration affects series connected solar cells efficiency. It was find out that polycrystalline solar cell efficiency does not depend on the form of shadow zone. Finally it was found out that partically shaded solar cell efficiency decrease proportionally depending on shadowed zone light intensity. Structure: introduction, literature review, metodology, results and analysis, conclusions and suggestions, references. Thesis consist of: 53 p. text without appendixes, 44 pictures, 9 tables, 34 bibliographical entries.

Baigiamajame magistro darbe analizuojamos ilga拧vy膷i懦 fosfor懦 spinduliuojamos 拧viesos priklausomyb臈s nuo i拧orini懦 aplinkos s膮lyg懦 - skirtingos temperat奴ros aplinkose. Pirmoje dalyje atlikta mokslin臈s literat奴ros analiz臈, susijusi su liuminescencijos ir liuminescencini懦 med啪iag懦 tyrimais. Antroje dalyje pateikta ilga拧vy膷io fosforo bandinio Zn3Ga2Ge2O10:0,5 %Cr3+ savybi懦 tyrimo metodika. Tre膷ioje dalyje, remiantis i拧analizuota moksline literat奴ra, i拧tirtos galimyb臈s panaudoti ilga拧vy膷io fosforo jungin寞 Zn3Ga2Ge2O10:0,5%Cr3+ 拧viesos akumuliavimui saul臈s elementuose. Atlikti Zn3Ga2Ge2O10:0,5%Cr3+ 拧vyt臈jimo trukm臈s priklausomybi懦 nuo ap拧vitos laiko tyrimai ir i拧tirtos ilga拧vy膷io fosforo fotoliuminescencin臈s charakteristikos ma啪inant bandinio temperat奴r膮. Nustatyta, kad Zn3Ga2Ge2O10:0,5%Cr3+ fosforas turi puikius geb臈jimus 拧viesos surinkimui, saugojimui bei 拧viesos emisijai, o jo gyvavimo trukm臈s 拧aldant ilg臈ja, tod臈l 拧io fosforo sukaupt膮 energij膮 galima akumuliuoti ir v臈liau efektyviai panaudoti norimu laiku. Darb膮 sudaro 5 dalys: 寞vadas, literat奴ros ap啪valga, tyrim懦 metodika, rezultatai ir j懦 analiz臈, i拧vados ir rekomendacijos, literat奴ros s膮ra拧as. Darbo apimtis 鈥� 36 p. teksto be pried懦, 21 iliustr., 6 lent., 22 bibliografiniai 拧altiniai.

Master thesis analyzes the dependence of light emitted by long lasting phosphors on external environmental conditions. In the first part analysis of scientific works related with research of fluorescence as a phenomenon and with results of investigations of long lasting phosphors' properties is carried out. The second part outlines methodology used to analyze the properties of long lasting phosphor Zn3Ga2Ge2O10:0,5%Cr3+. On the basis of the analysis of the scientific works, the third part is devoted to investigate the possibility to use the radiation of the compound Zn3Ga2Ge2O10:0,5%Cr3+ in solar cell energy storage system. Results of investigation of glow decay time constants after excitation depending on exposure duration and reduced temperature are presented in the current work. Finally, the main results are summarized and conclusions/recommendation are given at the end of this work. The work consists of 5 sections: introduction, literature review, experimental, results and discussion, conclusions and recommendations and list of references. Thesis consists of 36 pages of text without appendixes, 21 figures, 6 tables, 22 positions in list of references.