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Solar charging of electrical vehicles

Solar charging of electrical vehicles Electric cars are seen as the sustainable future of transport. But they are only truly sustainable if the electricity used to charge them comes from sustainable sources and not from fossil fuels. This is why researchers and businesses are also looking into charging electric vehicles with solar panels. TU Delft has developed a quick charger together with the companies Power Research Electronics and Last Mile Solutions which can charge cars directly with electricity from solar panels. Direct current Solar photovoltaic panels (PV) generate direct current (DC) and this normally had to be converted to alternating current (AC) before it could be used to charge an electric car. ‘Charging stations are currently using the 50Hz AC network to exchange power between the solar panels and the vehicle,’ explains Gautham Ram. ‘However, this is not efficient or cost-effective, for two reasons. Firstly, converting to AC results in unnecessary steps and power loss. And, secondly, it requires two separate DC-AC converters, one for the vehicle and one for the solar panels, resulting in increased costs and size.’ Interim stage unnecessary ‘A more self-evident solution would be to use a single converter, which could charge the vehicle from the panels via a DC link while also being connected to the AC electricity grid. In this study, we therefore designed a 10kW converter with an internal DC link and three terminals, which can charge the vehicle both from the solar panels and the electricity grid. The integrated DC charger has a higher efficiency and is about three times smaller than existing solutions based on AC power exchange.’ The use of this charger means that the electricity grid is no longer needed as an interim stage in charging. In addition, the system works two ways. Not only can you charge your electric car with solar power, the energy from the charged car battery can also be used to supply your house or the grid with electricity, although this first requires conversion into alternating current. This concept is referred to as ‘vehicle-to-grid’ ‘The developed converter is used in a solar charging station, including smart charging algorithms. Charging the vehicle with solar energy resulted in zero CO2 emission, lower fuel costs, tax benefits and less dependence on the feed-in tariffs for renewable energy.’ Prof. dr. Pavol Bauer +31 15 27 84654 p.bauer@tudelft.nl dr. Ir. Gautham Ram +31 15 27 81898 g.r.chandramouli@tudelft.nl Links Award IDtechEx– Most Significant Innovation for Electric Vehicles https://www.tudelft.nl/2018/ewi/pavol-bauer-gautham-ram-and-menno-kardolus-awarded-most-significant-innovation-in-electric-vehicles-prize / Department of DC Systems, Energy Conversion & Storage https://www.tudelft.nl/en/eemcs/the-faculty/departments/electrical-sustainable-energy/dc-systems-energy-conversion-storage/ DIG IT Research Exhibition: https://www.youtube.com/watch?v=6FPWXQ9Bbec&t=8s Electric Cars: Technology Obtain a comprehensive understanding of electric mobility to lead projects and initiatives to success: https://online-learning.tudelft.nl/courses/electric-cars-technology / Related courses Partners

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Solar charging of electrical vehicles

Solar charging of electrical vehicles Electric cars are seen as the sustainable future of transport. But they are only truly sustainable if the electricity used to charge them comes from sustainable sources and not from fossil fuels. This is why researchers and businesses are also looking into charging electric vehicles with solar panels. TU Delft has developed a quick charger together with the companies Power Research Electronics and Last Mile Solutions which can charge cars directly with electricity from solar panels. Direct current Solar photovoltaic panels (PV) generate direct current (DC) and this normally had to be converted to alternating current (AC) before it could be used to charge an electric car. ‘Charging stations are currently using the 50Hz AC network to exchange power between the solar panels and the vehicle,’ explains Gautham Ram. ‘However, this is not efficient or cost-effective, for two reasons. Firstly, converting to AC results in unnecessary steps and power loss. And, secondly, it requires two separate DC-AC converters, one for the vehicle and one for the solar panels, resulting in increased costs and size.’ Interim stage unnecessary ‘A more self-evident solution would be to use a single converter, which could charge the vehicle from the panels via a DC link while also being connected to the AC electricity grid. In this study, we therefore designed a 10kW converter with an internal DC link and three terminals, which can charge the vehicle both from the solar panels and the electricity grid. The integrated DC charger has a higher efficiency and is about three times smaller than existing solutions based on AC power exchange.’ The use of this charger means that the electricity grid is no longer needed as an interim stage in charging. In addition, the system works two ways. Not only can you charge your electric car with solar power, the energy from the charged car battery can also be used to supply your house or the grid with electricity, although this first requires conversion into alternating current. This concept is referred to as ‘vehicle-to-grid’ ‘The developed converter is used in a solar charging station, including smart charging algorithms. Charging the vehicle with solar energy resulted in zero CO2 emission, lower fuel costs, tax benefits and less dependence on the feed-in tariffs for renewable energy.’ Prof. dr. Pavol Bauer +31 15 27 84654 p.bauer@tudelft.nl dr. Ir. Gautham Ram +31 15 27 81898 g.r.chandramouli@tudelft.nl Links Award IDtechEx– Most Significant Innovation for Electric Vehicles https://www.tudelft.nl/2018/ewi/pavol-bauer-gautham-ram-and-menno-kardolus-awarded-most-significant-innovation-in-electric-vehicles-prize / Department of DC Systems, Energy Conversion & Storage https://www.tudelft.nl/en/eemcs/the-faculty/departments/electrical-sustainable-energy/dc-systems-energy-conversion-storage/ DIG IT Research Exhibition: https://www.youtube.com/watch?v=6FPWXQ9Bbec&t=8s Electric Cars: Technology Obtain a comprehensive understanding of electric mobility to lead projects and initiatives to success: https://online-learning.tudelft.nl/courses/electric-cars-technology / Related courses Partners
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Students Amos Yusuf, Mick Dam & Bas Brouwer winners of Mekel Prize 2024

Master students Amos Yusuf, from the ME faculty (Mick Dam, from the EEMCS faculty and graduate Bas Brouwer have won the Mekel Prize 2024 for the best extra scientific activity at TU Delft: the development of an initiative that brings master students into the classroom teaching sciences to the younger generations. The prize was ceremonially awarded by prof Tim van den Hagen on 13 November after the Van Hasselt Lecture at the Prinsenhof, Delft. They received a statue of Professor Jan Mekel and 1.500,- to spend on their project. Insights into climate change are being openly doubted. Funding for important educational efforts and research are being withdrawn. Short clips – so called “reels” – on Youtube and TikTok threaten to simplify complex political and social problems. AI fakes befuddle what is true and what is not. The voices of science that contribute to those discussion with modesty, careful argument and scepticism, are drowned in noise. This poses a threat for universities like TU Delft, who strive to increase student numbers, who benefit from diverse student populations and aim to pass on their knowledge and scientific virtues to the next generation. It is, therefore, alarming that student enrolments to Bachelor and Master Programs at TU Delft have declined in the past year. Students in front of the class The project is aimed to make the sciences more appealing to the next generation. They have identified the problem that students tend miss out on the opportunity of entering a higher education trajectory in the Beta sciences – because they have a wrong picture of such education. In their mind, they depict it as boring and dry. In his pilot lecture at the Stanislas VMBO in Delft, Amos Yusuf has successfully challenged this image. He shared his enthusiasm for the field of robotics and presented himself as a positive role model to the pupils. And in return the excitement of the high school students is palpable in the videos and pictures from the day. The spark of science fills their eyes. Bas Brouwer Mick Dam are the founders of NUVO – the platform that facilitates the engagement of Master Students in high school education in Delft Their efforts offer TU Delft Master Students a valuable learning moment: By sharing insights from their fields with pupils at high school in an educational setting, our students can find identify their own misunderstandings of their subject, learn to speak in front of non-scientific audiences and peak into education as a work field they themselves might not have considered. An extraordinary commitment According to the Mekel jury, the project scored well on all the criteria (risk mitigation, inclusiveness, transparency and societal relevance). However, it was the extraordinary commitment of Amos who was fully immersed during his Master Project and the efforts of Brouwer and Dam that brought together teaching and research which is integral to academic culture that made the project stand out. About the Mekel Prize The Mekel Prize will be awarded to the most socially responsible research project or extra-scientific activity (e.g. founding of an NGO or organization, an initiative or realization of an event or other impactful project) by an employee or group of employees of TU Delft – projects that showcase in an outstanding fashion that they have been committed from the beginning to relevant moral and societal values and have been aware of and tried to mitigate as much as possible in innovative ways the risks involved in their research. The award recognizes such efforts and wants to encourage the responsible development of science and technology at TU Delft in the future. For furthermore information About the project: https://www.de-nuvo.nl/video-robotica-pilot/ About the Mekel Prize: https://www.tudelft.nl/en/tpm/our-faculty/departments/values-technology-and-innovation/sections/ethics-philosophy-of-technology/mekel-prize

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