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Hydrogen vs. electricity - comparison of energy performance of EV powertrains
Šándor, Kristián ; Mišík, Ondrej (oponent) ; Fišer, Jan (vedoucí práce)
The topic of emission reduction and the increase in the share of energy produced from renewable sources remains actual and highly discussed in 2021. It was the major reason why I chose to compose this bachelor’s thesis, in which I aim to critically evaluate and compare the energy performance of an electrical vehicle and a hydrogen vehicle. The theoretical part of the thesis outlines the aforementioned drivetrains as well as the plug-in hybrid drivetrain. The practical part of the thesis focuses on calculations of the energy performance of the drivetrains for the year 2021 with a rational estimate for 2050. The methods of electricity and hydrogen production are crucial for energy performance evaluation. Data shows that electric cars operated in countries with a high share of energy produced from renewable sources are the least energetically demanding. On the other hand, if the energy production depends predominantly on fossil fuels, it is more efficient to operate a hydrogen vehicle. Calculations show that when considering the indirect emissions during the operation as well as the energy performance, the plug-in hybrid vehicles are the least efficient. The difference in efficiency between electric and hydrogen vehicles varies depending on the mode of energy production of that specific country. The conclusion of this thesis also discusses advantages, disadvantages and technological challenges concerning the aforementioned drivetrains.
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Application of the Life Cycle Assessment (LCA) method to passenger cars
Šándor, Kristián ; Mišík, Ondrej (oponent) ; Fišer, Jan (vedoucí práce)
The electrification of personal transport is an intensely discussed and relevant topic in 2023. The motivation behind this master thesis was to compare the lifetime energy consumption of vehicles equipped with internal combustion engines, battery-powered electric systems, and fuel cells. The theoretical part of this master thesis includes the introduction and explanation of the method by which a product lifecycle is assessed, known as LCA. The dissertation includes a chapter detailing the main components of automobiles, followed by a chapter which has calculations the energy consumption of production, operation, and recycling or destruction of the automobiles. The outcome of the theoretical part shows that the lifecycle of a battery-powered electric car is the least energetically costly, followed by internal combustion cars, and fuel cell cars being the most energy costly. The practical part of this master thesis involved a physical decomposition of a vehicle with an internal combustion engine with the aim of obtaining the material composition of its components and applying the LCA method on the vehicle Skoda Octavia III. The thesis sparks future research and eco-friendly alternatives in personal transportation.
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Hydrogen vs. electricity - comparison of energy performance of EV powertrains
Šándor, Kristián ; Mišík, Ondrej (oponent) ; Fišer, Jan (vedoucí práce)
The topic of emission reduction and the increase in the share of energy produced from renewable sources remains actual and highly discussed in 2021. It was the major reason why I chose to compose this bachelor’s thesis, in which I aim to critically evaluate and compare the energy performance of an electrical vehicle and a hydrogen vehicle. The theoretical part of the thesis outlines the aforementioned drivetrains as well as the plug-in hybrid drivetrain. The practical part of the thesis focuses on calculations of the energy performance of the drivetrains for the year 2021 with a rational estimate for 2050. The methods of electricity and hydrogen production are crucial for energy performance evaluation. Data shows that electric cars operated in countries with a high share of energy produced from renewable sources are the least energetically demanding. On the other hand, if the energy production depends predominantly on fossil fuels, it is more efficient to operate a hydrogen vehicle. Calculations show that when considering the indirect emissions during the operation as well as the energy performance, the plug-in hybrid vehicles are the least efficient. The difference in efficiency between electric and hydrogen vehicles varies depending on the mode of energy production of that specific country. The conclusion of this thesis also discusses advantages, disadvantages and technological challenges concerning the aforementioned drivetrains.
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