In order to accurately conduct the preliminary and detailed design of solar powered Unmanned Aerial Systems (UAS), it is necessary to have a thorough understanding of the systems involved. In particular, it is desirable to have mathematical models and analysis tools describing the energy income and expenditure of the vehicle. Solar energy income models may include available solar irradiance, photovoltaic array power output, and maximum power point tracker efficiency. Energy expenditure models include battery charging and discharging characteristics, propulsion system efficiency, and aerodynamic efficiency. In this thesis, a series of mathematical models were developed that characterize the performance of these systems. Several of these models were then validated against test data. Testing was conducted on specific components used by a solar UAS designed and built by students at the California Polytechnic State University, San Luis Obispo, which completed a six-hour flight relying only on solar energy in May 2019. Results indicate that, while some models accurately predicted test outcomes, others still need further improvement. While these models may be useful during the preliminary and detailed design phases of a solar powered UAS, specific component testing should be conducted to converge on the most desired design solution.

This thesis describes wind power plants with focus on specific type of power plant. The trends of wind turbines in the world and in the Czech Republic are briefly described. Part of the thesis is the calculation of wind power plants, according to the selected type, which is located in the site of Prosiměřice in Znojmo. Calculation using RETScreen programme was also used.

This diploma thesis describes hydraulic design of Swirl turbine, dedicated to be used for tidal powerplant and study possibilities of the turbine to work in turbine, reverse turbine, pump and reverse pump regime. From individual regimes, graphical characteristics of created hydraulic design were created and compared, using CFD simulations.

The objective of this thesis is creation of technical and economic assessment of the suitability of pumped storage hydroelectric power plant Smědavský vrch. Thesis contain's technological design, power output and whole economic solution of the project with regard to construction and business.

Práce je zaměřena na nalezení optimálního a nového motoru pro PS-28 Sport Cruiser, pro větší výkon a tah. Rotax 912 ULS je v současné době jediným motorem, který klient této práce (Czech Aircraft Works, dále jen CZAW) instaluje do letadel Sport Cruiser. Tato čtyřválcová pohonná jednotka má maximální vzletový výkon 100 hp. Pro náročnější zákazníky bude nabídka rozšířena o Lycoming O-235-L2C, což je také čtyřválcový motor s maximálním vzletovým výkonem 118 koní. Což znamená, že společnost bude mít větší možnost a klient bude mnohem spokojenější.

Práce je zaměřena na nalezení optimálního a nového motoru pro PS-28 Sport Cruiser, pro větší výkon a tah. Rotax 912 ULS je v současné době jediným motorem, který klient této práce (Czech Aircraft Works, dále jen CZAW) instaluje do letadel Sport Cruiser. Tato čtyřválcová pohonná jednotka má maximální vzletový výkon 100 hp. Pro náročnější zákazníky bude nabídka rozšířena o Lycoming O-235-L2C, což je také čtyřválcový motor s maximálním vzletovým výkonem 118 koní. Což znamená, že společnost bude mít větší možnost a klient bude mnohem spokojenější.

This thesis is focused on the opportunities of conceptual development of the local distribution system Prototypa, a.s. At first, there is descripted condition of the current substations and internal electricity distribution system. Practical part of the thesis is dedicated to the evaluation of the construction of new transformer station and projection proposals of connection of the high-power charging station and new electric power supply.

Resumo: A proposta desta dissertação foi a de apresentar o desempenho de uma microcentral hidrelétrica, instalada no Centro de Energias Renováveis da Unesp, Campus Guaratinguetá. As análises apresentadas são de desempenho elétrico e mecânico. A microcentral hidrelétrica utiliza roda Pelton com 0,4m de diâmetro no ponto de incidência do jato de água. O gerador utilizado foi com rotor de ímãs permanentes de ferrite. Tanto o gerador quanto a microusina são de baixo custo de aquisição e instalação. Foram feitos os testes em bancada com o gerador aproximando o máximo possível das condições ideais de funcionamento. Também foram realizadas algumas alterações físicas na microhidrelétrica para manter a rotação constante com a variação de carga. Utilizaram-se cargas resistivas e não-lineares. Os resultados contribuíram para a melhoria da qualidade da energia e o controle do fluxo de água no processo de geração de energia. O conjunto composto de gerador e a turbina Pelton, durante o experimento, apresentaram rendimentos eletromecânicos da ordem de 20% a 30% comparados com a teoria. / Abstract: This proposal of this work is to demonstrate the performance of a Micro- Hydroelectrical Powerplant (MHP), which has been installed at the UNESP – FEG - Renewable Energy Center, in Guaratinguetá-SP. The present analysis refers to the electrical and mechanical performances. The micro-hydroelectrical powerplant employs a Pelton turbine with a diameter of 0,4m at the incidence of water flow. The generator is provided with permanent ferrite magnet rotor. Costs were low for both the acquisition of parts and installation of the generator and the micro-hydroelectrical powerplant. Bench tests carried out with the generator reached the maximum possible ideal functioning conditions. Some physical modifications were necessary to maintain constant rotation with load variations. Resistive and non-linear loads were used in the essays. The results contributed for an improvement in the quality of energy and the control of water flow in the process of generating energy. The assembly composed of the generator and the Pelton turbine presented an electro-mechanical revenue between 20% to 30%. / Orientador: Teófilo Miguel de Souza. / Coorientador: Pedro Magalhães Sobrinho. / Banca: Samuel Euzedice de Lucena. / Banca: Osiris Cancigliere Junior. / Mestre

Made available in DSpace on 2014-06-11T19:29:53Z (GMT). No. of bitstreams: 0 Previous issue date: 2007-03Bitstream added on 2014-06-13T20:00:00Z : No. of bitstreams: 1 almeida_jlcn_me_guara.pdf: 1246383 bytes, checksum: bca809ae8bb8fe32b7de24055d2e53d7 (MD5) / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / A proposta desta dissertação foi a de apresentar o desempenho de uma microcentral hidrelétrica, instalada no Centro de Energias Renováveis da Unesp, Campus Guaratinguetá. As análises apresentadas são de desempenho elétrico e mecânico. A microcentral hidrelétrica utiliza roda Pelton com 0,4m de diâmetro no ponto de incidência do jato de água. O gerador utilizado foi com rotor de ímãs permanentes de ferrite. Tanto o gerador quanto a microusina são de baixo custo de aquisição e instalação. Foram feitos os testes em bancada com o gerador aproximando o máximo possível das condições ideais de funcionamento. Também foram realizadas algumas alterações físicas na microhidrelétrica para manter a rotação constante com a variação de carga. Utilizaram-se cargas resistivas e não-lineares. Os resultados contribuíram para a melhoria da qualidade da energia e o controle do fluxo de água no processo de geração de energia. O conjunto composto de gerador e a turbina Pelton, durante o experimento, apresentaram rendimentos eletromecânicos da ordem de 20% a 30% comparados com a teoria. / This proposal of this work is to demonstrate the performance of a Micro- Hydroelectrical Powerplant (MHP), which has been installed at the UNESP FEG - Renewable Energy Center, in Guaratinguetá-SP. The present analysis refers to the electrical and mechanical performances. The micro-hydroelectrical powerplant employs a Pelton turbine with a diameter of 0,4m at the incidence of water flow. The generator is provided with permanent ferrite magnet rotor. Costs were low for both the acquisition of parts and installation of the generator and the micro-hydroelectrical powerplant. Bench tests carried out with the generator reached the maximum possible ideal functioning conditions. Some physical modifications were necessary to maintain constant rotation with load variations. Resistive and non-linear loads were used in the essays. The results contributed for an improvement in the quality of energy and the control of water flow in the process of generating energy. The assembly composed of the generator and the Pelton turbine presented an electro-mechanical revenue between 20% to 30%.

The master’s thesis is dealt with the design of rebuilding of VUT 051 RAY which is equipped electric powerplant to twin-engine conception named VUT 051 RAY-DUO. In the thesis was verified the range of centre of gravity position of VUT 051 RAY-DUO then powerplant in ducted fan configuration was designed, performances of the airplane were appointed and controllability during fail one of the engines was analysed. The design of new powerplant was verified by strength analysis and then costing calculation was established.