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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Návrh letounu pro zástavbu hybridní pohonné jednotky / Aircraft design for the installation of a hybrid powerplant

Kapoun, Tomáš January 2015 (has links)
The master‘s thesis "Aircraft design for the installation of a hybrid powerplant" is focused on the design of the airplane suitable for hybrid powerplant. At the same time it is also deal with the most suitable location of the components necessary for this powerplant. These components are: a combustion engine, electric motor, gearbox and bed engine. Part of the master thesis is application-mount designed components: location and number of containers with batteries, a proposal for a new engine bed suitable for a hybrid powerplant. In the sub - section of the thesis is made a simple calculation of the economic return on investment from the perspective of the end-user aircraft with a hybrid powerplant.
2

Análise exergo-econômica da microgeração com o uso de motores de combustão interna a biodiesel no acionamento do compressor do sistema por compressão de vapor / Microgeneration exergoeconomic the analysis with use of internal combustion engines biodiesel system compressor drive for steam compression

Silva, Gerson Barbosa da 02 May 2016 (has links)
Submitted by Viviane Lima da Cunha (viviane@biblioteca.ufpb.br) on 2017-06-09T13:24:22Z No. of bitstreams: 1 arquivototal.pdf: 4250994 bytes, checksum: dcfe9035b92d4c47642b67812e3d7ba3 (MD5) / Made available in DSpace on 2017-06-09T13:24:22Z (GMT). No. of bitstreams: 1 arquivototal.pdf: 4250994 bytes, checksum: dcfe9035b92d4c47642b67812e3d7ba3 (MD5) Previous issue date: 2016-05-02 / This wort, its preset the theoretical and experimental study of a vapor compression system (SRCV), with cooling capacity of 26kW (7.5TR) developed at the Recogás at the Federal University of Paraíba. At first is analyzed the efficiency of the refrigeration system for vapor compression, where the circulation of refrigerant fluid is done by a hermetic compressor one piston that is driven by an electric motor, the second time, is analyzed circulation of refrigerant fluid system which is generated by a compressor opened, which is also triggered by the internal combustion engine. The two refrigeration systems working with fixed rotation compressor. Thermodynamic analyzes are performed and termoeconômicas of a plant expansion project a result of the CHP energy. Aimed to this research was to evaluate the performance of the system, working at different times with mineral diesel and biodiesel blends this with the proportions equivalent to B5 (95% mineral diesel and 5% biodiesel) B20 (80% mineral diesel and 20 % biodiesel), B40 (60% mineral diesel and 40% biodiesel), B60 (40% mineral diesel and 60% biodiesel) and) and B80 (20% mineral diesel and 80% biodiesel). Making use of computer platform fo Labview temperatures and pressures in real times and routines of computing platform Engineering Equation Solver - EES and Excel, to generate simulations of the refrigeration cycle, which has been validated with the experimental data. / Neste trabalho, apresenta-se o estudo teórico e experimental de um sistema de refrigeração por compressão de vapor (SRCV), com capacidade de refrigeração de 26kW (7.5TR) e que é desenvolvido na Recogás na Universidade Federal da Paraíba. No primeiro momento, é analisada a eficiência do sistema de refrigeração por compressão de vapor, no qual a circulação do fluido refrigerante é feita por um compressor hermético a pistão que é acionado por um motor elétrico; no segundo momento, é analisada a eficiência do sistema de refrigeração que usa um compressor aberto, acionado pelo motor de combustão interna para compressão de vapor. Estes dois sistemas de refrigeração trabalham com rotação do compressor fixa. São realizadas análises termodinâmicas e termoeconômicas de uma planta resultante do projeto de expansão do sistema de cogeração de energia. Objetivou-se com este trabalho avaliar o desempenho do sistema, funcionando em momentos distintos com diesel mineral e misturas deste com biodiesel nas proporções equivalentes a B5 (95% de diesel mineral e 5% de biodiesel) B20 (80% de diesel mineral e 20% de biodiesel), B40 (60% de diesel mineral e 40% de biodiesel), B60 (40% de diesel mineral e 60% de biodiesel) e) e B80 (20% de diesel mineral e 80% de biodiesel). Fazendo uso da plataforma computacional Labview para obter as temperaturas e pressões em tempos reais e de rotinas da plataforma computacional Engineering Equation Solver - EES e o Excel, para gerar simulações do ciclo de refrigeração, as quais foram validadas com os dados experimentais.
3

Využití solární energie pro elektromobilitu / Use of solar energy for electromobility

Harant, Miroslav January 2019 (has links)
The thesis deals with the use of solar energy for electromobility. First, the potential of electromobility on the current market is theoretically discussed. This issue includes mainly the producers of electrically powered vehicles, the issue of electric energy storage and the real applications of fast charging and photovoltaic charging stations. In the next part, electric cars are analyzed, which use solar energy for their function and their efficiency is compared with the effiency of combustion engines. The main part of this thesis is the design of photovoltaic charging station for electric vehicles. The final part deals with the economic evaluation of the proposed charging station.
4

Využití solární energie pro elektromobilitu / Use of solar energy for electromobility

Harant, Miroslav January 2020 (has links)
The thesis deals with the use of solar energy for electromobility. First, the potential of electromobility on the current market is theoretically discussed. This issue includes mainly the producers of electrically powered vehicles, the issue of electric energy storage and the real applications of fast charging and photovoltaic charging stations. The second part of the diploma thesis deals with the measurement of electric car consumption and the evaluation of measurement results. In the next part, electric cars are analyzed, which use solar energy for their function and their efficiency is compared with the effiency of combustion engines. The main part of this thesis is the design of photovoltaic charging station for electric vehicles. The final part deals with the economic evaluation of the proposed charging station.

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