Student: ADEMIR FERREIRA DA ROCHA

Title: AVALIAÇÃO DO ARMAZENAMENTO DE ENERGIA TÉRMICA EM UM SISTEMA DE LEITO EMPACOTADO COM PARTÍCULAS AGLOMERADAS: CARREGAMENTO E DESCARREGAMENTO

Supervisor: PROF. DR. JORNANDES DIAS DA SILVA

External Examiner: PROF. DR. SÉRGIO MÁRIO LINS GALDINO

Internal Examiner: PROF. DR. DEIVSON CESAR SILVA SALES 

Date: July 08th, 2024

Time: 17:00

Place: Room I4

Abstract: 

The development of new research related to photovoltaic energy is becoming increasingly important, and in order for it to be carried out in the best way, it requires the help of certain equipment, such as solar simulators. Therefore, this work aims to develop a prototype of equipment capable of simulating the intensity and spectrum of sunlight using a lighting arrangement with a combination of 10 white LED reflectors, 6 halogen lamps and a set of power LEDs emitting radiation at wavelengths of 450 nm (blue), 750 nm (magenta) and 850 nm (infrared). This arrangement was organized in order to obtain a homogeneous distribution of light on a surface of 600 cm2. To characterize the proposed solar simulator, in accordance with the IEC 60904-9 standard, Spectral Correspondence (SM), Spectral Non-Uniformity (SNU) and Temporal Instability were analyzed. (TIE) For the three parameters analyzed (SM = 1.05, SN = 4.6 and TIE = 0.08) the proposed simulator is classified as BAA. As a proof of concept, the power x voltage (P − V ) and current x voltage (I − V ) curves of a 5W solar panel with an area equal to 300 cm2 were plotted through the simulator and outdoors. A relative error of less than 4% was found for all analyzed panel parameters. The results indicated in this work show the feasibility of designing a solar simulator with low-cost incandescent and semiconductor light sources and with potential for characterizing commercial photovoltaic equipment. .

Keywords: Solar Simulator; Sunlight; Solar Spectrum.

A Defesa do Projeto de Dissertação acontecerá no dia 25/03/24, no Instituto de Inovação Tecnológica da Universidade de Pernambuco - 3º andar.

Student: JÔNATAS NASCIMENTO DA SILVA

Title: ANÁLISE DA ADEQUAÇÃO DE SISTEMAS FOTOVOLTAICOS NAS MESORREGIÕES DE PERNAMBUCO: ESTUDO DA TAXA DE DESEMPENHO VERSUS FATORES DE IMPLANTAÇÃO

Supervisor: PROF. DR. JORNANDES DIAS DA SILVA

Co-supervisor: PROF. DR. DEIVSON CESAR SILVA SALES

External Examiner: PROF. DR. SÉRGIO MÁRIO LINS GALDINO

Internal Examiner: PROF. DR. MANOEL HENRIQUE DA NÓBREGA MARINHO

Date: March 04th, 2024

Time: 14:30

Place: Room I4

Abstract: 

This work aims to provide information and propose an analysis criterion through the comparison between performance ratio and deployment factors of different photovoltaic systems technologies, in order to assist decision-making regarding the choice of the most suitable system for each mesoregion in Pernambuco. Pernambuco was chosen because it is an extremely favorable region for photovoltaic energy generation and because it has mesoregions with different characteristics that will greatly contribute to the research. The performance ratio was chosen as a relevant variable because it seeks to assess system losses not only based on cell efficiency but also on losses related to installation method and site-specific peculiarities. Deployment factors were defined considering economic aspects, based on the type of PV technology used, in which the following parameters were established: total area occupied by each system, cost of photovoltaic modules, market supply availability, and equipment lifespan. Regarding the applied methodology, a quantitative approach was adopted for data exploration and a qualitative analysis of results, through procedures such as data collection, tabulation, construction of technology rankings in each mesoregion, and technical analysis of results. According to the criteria used in this research, it was possible to observe that silicon-based mono and polycrystalline technologies achieved the best results, with particular emphasis on monocrystalline technology (m-Si), which, even though it did not achieve the best performance rate in some mesoregions, demonstrated to be the technology with the most advantageous deployment. Finally, it was possible to define parameters indicating which system is most suitable for each mesoregion, considering both the technical aspects of each technology and the economic deployment factors of each.

Keywords: Solar Energy; Photovoltaic Systems; Performance Ratio; Technologies; Implementation Factors.