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Abstract(s)
O consumo de combustíveis tem um peso determinante no custo total das missões
desenvolvidas pela Marinha Portuguesa, pelo que a presente dissertação de mestrado se
reveste de interesse no que diz respeito à poupança de combustível, com as vantagens
evidentes, bem como na redução da pegada carbónica das operações do navio.
Assim, este trabalho surge da necessidade de investigar metodologias para conhecer e
reduzir os consumos energéticos a bordo de navios de guerra.
Com a finalidade de realizar uma otimização energética, foi selecionado um navio
modelo, sendo realizados vários estudos, analisando as condições de funcionamento e
características dos vários sistemas conversores de energia, destacando o propulsor, a
energia elétrica e a energia térmica, com o objetivo de avaliar os consumos energéticos e o
rendimento global, ou seja, o balanço da energia que é convertida e utilizada a bordo em
cada um dos sistemas mencionados.
Foram desenvolvidos quatro simuladores na ferramenta “MATLAB” onde, em três
deles, é simulado o comportamento energético do navio modelo, podendo o quarto
simulador ser utilizado para outros navios.
Para efetuar estas simulações é necessário a introdução de algumas condições iniciais,
como as características do próprio navio, a velocidade a que este se desloca, a marcação e
intensidade do vento a que está sujeito, bem como as características dos hélices e
respetivos motores propulsores. Através destes simuladores foi possível obter um balanço
global e específico, para alguns equipamentos, dos seus consumos e rendimentos
energéticos. Após o desenvolvimento dos simuladores, os mesmos foram submetidos à validação
por comparação com dados retirados do navio modelo real, permitindo identificar áreas de
melhoria, de forma a reduzir o erro entre os modelos e o modelo físico, isto é, o navio real.
Desta forma, pretendeu-se melhorar os conhecimentos ao nível dos processos de
conversão e consumo de energia do navio modelo, desenvolvendo uma ferramenta de
preparação de viagem, tendo em conta as condições meteorológicas e as vertentes
energético-ambientais das operações do navio modelo, ou de qualquer outro navio da
Marinha Portuguesa.
Fuel consumption has a significant weight on the cost of missions undertaken by the Portuguese Navy. This dissertation is focused precisely on the advantages drawn by fuel savings on ships’ operations and overall carbon footprint reduction. This dissertation is justified by the need to develop methods to better understand and decrease energy consumption on board warships. In order to perform an energy optimization study, a baseline model ship was selected. The undertaken studies focused on analyzing operational conditions and characteristics of the various power systems converters, with special emphasis on the propellant, electric energy and thermal energy, with the purpose of evaluating energy consumption and overall yield, i.e., measuring the balance of the energy that is converted and used on board in each of the aforementioned systems. Four simulators were developed using "MATLAB" tool; three where used to simulate the energy behavior of the baseline model ship and an additional one for other ships. To perform these simulations it was necessary to introduce some initial assumptions, such as the characteristics of the ship itself, the speed at which the ship moves, the intensity of the wind that it is subject to, as well as the characteristics of the respective propellers and propeller engines. Through this simulator it was possible to obtain both a specific and global understanding of energy consumption and utilization for a set of equipments. Following the simulators’ development, they were subjected to validation by comparing data from the real baseline model ship, allowing the identification of areas in need of improvement, reducing the errors between the simulation model and the actual physical model, i.e., the actual ship. Therefore, the goal of this dissertation was to improve the level of knowledge of conversion processes and energy consumption of the baseline model ship, developing a travel planning tool that would take into account the weather and the environmental energy aspects of the operations of the baseline model ship or any other ship of the Portuguese Navy.
Fuel consumption has a significant weight on the cost of missions undertaken by the Portuguese Navy. This dissertation is focused precisely on the advantages drawn by fuel savings on ships’ operations and overall carbon footprint reduction. This dissertation is justified by the need to develop methods to better understand and decrease energy consumption on board warships. In order to perform an energy optimization study, a baseline model ship was selected. The undertaken studies focused on analyzing operational conditions and characteristics of the various power systems converters, with special emphasis on the propellant, electric energy and thermal energy, with the purpose of evaluating energy consumption and overall yield, i.e., measuring the balance of the energy that is converted and used on board in each of the aforementioned systems. Four simulators were developed using "MATLAB" tool; three where used to simulate the energy behavior of the baseline model ship and an additional one for other ships. To perform these simulations it was necessary to introduce some initial assumptions, such as the characteristics of the ship itself, the speed at which the ship moves, the intensity of the wind that it is subject to, as well as the characteristics of the respective propellers and propeller engines. Through this simulator it was possible to obtain both a specific and global understanding of energy consumption and utilization for a set of equipments. Following the simulators’ development, they were subjected to validation by comparing data from the real baseline model ship, allowing the identification of areas in need of improvement, reducing the errors between the simulation model and the actual physical model, i.e., the actual ship. Therefore, the goal of this dissertation was to improve the level of knowledge of conversion processes and energy consumption of the baseline model ship, developing a travel planning tool that would take into account the weather and the environmental energy aspects of the operations of the baseline model ship or any other ship of the Portuguese Navy.
Description
Keywords
Marinha Portuguesa, Navio, Energia, Simulador. Portuguese Navy, Ship, Energy, Simulator.