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Seykens, X. (author), Bekdemir, C. (author), Han, J. (author), Willems, R. (author), van Hal, J. (author)This paper focusses on the application of bioalcohols (ethanol and butanol) derived from seaweed in Heavy-Duty (HD) Compression Ignition (CI) combustion engines. Seaweed-based fuels do not claim land and are not in competition with the food chain. Currently, the application of high octane bioalcohols is limited to Spark Ignition (SI) engines....conference paper 2020
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Vredeveldt, A.W. (author), van Dijk, T. (author), van den Brink, A. (author)There is a strong urge to replace conventional bunker fuels such as heavy fuel oil (HFO), marine diesel oil (MDO) and marine gas oil (MGO) by ‘fuels’ which do not give a net emission of greenhouse gasses or emit pollutants when combusted. Candidate fuels are methanol, dimethyl ether (DME), ammonia, pressurised hydrogen and liquefied hydrogen....report 2020
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Willems, R. (author), Willems, F. (author), Deen, N. (author), Somers, B. (author)The understanding of reactivity controlled compression ignition has greatly improved throughout recent years. While its potential for extremely low NOx and soot emissions has been confirmed numerous times, there remain some ambiguities about the ability of this concept to attain very high efficiency. Now that increasingly stringent CO2...article 2020
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van Lieshout, P.S. (author), de Jonge, V. (author), Vredeveldt, A.W. (author), Finner, S. (author)Introducing alternative fuels on board has many far stretching implications for ship operators, authorities, fuel suppliers, equipment suppliers, engine manufacturers, ship builders and naval architects. In most cases such parties are not familiar with these new fuels. Hence a need exists for them for a means to quickly familiarize oneself with...report 2020
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Willems, F. (author), Kupper, F. (author), Ramesh, S. (author), Indrajuana, A. (author), Doosje, E. (author)Reactivity Controlled Compression Ignition (RCCI) combines very high thermal efficiencies with ultra-low engine out NO x and PM emissions. Moreover, it enables the use of a wide range of fuels. As this pre-mixed combustion concept relies on controlled auto-ignition, closed-loop combustion control is essential to guarantee safe and stable...conference paper 2019
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Constrained multivariable extremum-seeking for online fuel-efficiency optimization of Diesel enginesvan der Weijst, R. (author), van Keulen, T. (author), Willems, F.P.T. (author)This work presents a new method for online fuel-efficiency optimization of Diesel engines, using constrained extremum-seeking. A two-input optimization problem, which is suitable for extremum-seeking, is integrated into a tracking control system. As a result, both air-path and fuel-path actuators are used for tracking and extremum-seeking. A key...article 2019
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Bahceli, G. (author), Atli-Veltin, B. (author), Wilbers, D. (author), Cebeci, H. (author)Energy transition towards cleaner fuels and renewable energy brings the attention to liquefied natural gas (LNG) and liquid hydrogen (LH2) applications. Cryogenic storage temperatures make the suitable material selection for the construction of such applications difficult. Ultra-high molecular weight polyethylene (UHMWPE) thermoplastics are...conference paper 2019
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Willems, F. (author), van Gompel, P. (author), Seykens, X. (author), Wilkins, S. (author)This work gives an outlook on the potential of automated driving functions (ADFs) to reduce real-world CO2 and pollutant emissions for heavy-duty powertrains. Up to now, ADF research mainly focuses on increased traffic safety, driver comfort, and road capacity. Studies on emissions are lacking. By taking the driver out-of-the-loop, cycle-to...conference paper 2019
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Birdja, Y.Y. (author), Pérez-Gallent, E. (author), Figueiredo, M.C. (author), Göttle, A.J. (author), Calle-Vallejo, F. (author), Koper, M.T.M. (author)The electrocatalytic reduction of carbon dioxide is a promising approach for storing (excess) renewable electricity as chemical energy in fuels. Here, we review recent advances and challenges in the understanding of electrochemical CO2 reduction. We discuss existing models for the initial activation of CO2 on the electrocatalyst and their...article 2019
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Ibrahim, A. (author), Cicic, M. (author), Goswami, D. (author), Basten, T. (author), Johansson, K.H. (author)Vehicle platooning has been attracting attention recently because of its ability to improve road capacity, safety and fuel efficiency. Vehicles communicate using Vehicle-to- Vehicle (V2V) wireless communication, making their status (acceleration, position, etc.) available to other vehicles. Shock waves, i.e. zones of reduced traffic speed that...conference paper 2019
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- Tietge, U. (author), Diaz, S. (author), Mock, P. (author), Bandivadekar, A. (author), Dorboff, J. (author), Ligterink, N. (author) other 2019
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Hauck, M. (author), Sair, A.A. (author), Steinmann, Z. (author), Visschedijk, A. (author), O'Connor, D. (author), Denier van der Gon, H. (author)The carbon footprint of shale gas combusted in Europe was estimated from nine European shale gas plays as potential production regions. Greenhouse gas emission sources during shale gas production, such as fugitives from hydraulic fracturing or combustion emissions from horizontal drilling, were added to emissions occurring for conventional gas...article 2019
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Veraar, R.G. (author), Wieling, W.P.W. (author)Solid Fuel Ramjet (SFRJ) technology is a very attractive propulsion option to extend the range of gun launched projectiles mainly due to the combination of high specific impulse inherent to airbreathing propulsion and mechanical properties of the solid fuel capable of withstanding the very high launch loads in the gun. In 2004, the Netherlands...conference paper 2018
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van der Weijst, R. (author), van Keulen, T. (author), Willems, F.P.T. (author)Advanced control concepts are required to maximize the fuel-efficiency of Diesel engines and to comply with emission legislation. The aim of this paper is to develop a controller that fully utilizes the fuel-path and air-path hardware, and is adaptive for real-world disturbances. The control design comprises a feedback control system, which uses...conference paper 2018
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- Willems, F.P.T. (author) conference paper 2018
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Yuan, R. (author), Behrens, P. (author), Tukker, A. (author), Rodrigues, J.F.D. (author)China has embarked on a massive program of low-carbon electricity (LE) deployment, in order to reduce its current dependence on coal. The cumulative installed capacity of LE in 2015 was almost four times of that in 2002. Moreover, China has a target of 20% for non-fossil fuels in primary energy consumption by 2030. LE provides substantial carbon...article 2018
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Hunicz, J. (author), Mikulski, M. (author)Low-temperature combustion in reciprocating engines appears to be a cutting-edge technology which ensures extremely low emissions of nitrogen oxides and particulate matters in parallel with high fuel efficiency. This mode of combustion can be realized in homogeneous charge compression ignition engines. However, this technology poses challenges,...article 2018
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Hunicz, J. (author), Mikulski, M. (author), Rybak, A. (author)Controlled auto-ignition (CAI) is an advanced combustion technology offering high thermal efficiency and low NOX emissions. One promising approach to achieve CAI combustion is application of negative valve overlap resulting in internal exhaust gas re-circulation. However, combustion control is still an issue which should be resolved before wide...conference paper 2018
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Glasius, M. (author), Hansen, A.M.K. (author), Claeys, M. (author), Henzing, J.S. (author), Jedynska, A.D. (author), Kasper-Giebl, A. (author), Kistler, M. (author), Kristensen, K. (author), Martinsson, J. (author), Maenhaut, W. (author), Nøjgaard, J.K. (author), Spindler, G. (author), Stenström, K.E. (author), Swietlicki, E. (author), Szidat, S. (author), Simpson, D. (author), Yttri, K.E. (author)Sources of elemental carbon (EC) and organic carbon (OC) in atmospheric aerosols (carbonaceous aerosols) were investigated by collection of weekly aerosol filter samples at six background sites in Northern Europe (Birkenes, Norway; Vavihill, Sweden; Risoe, Denmark; Cabauw and Rotterdam in The Netherlands; Melpitz, Germany) during winter 2013....article 2018
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Hunicz, J. (author), Mikulski, M. (author)One of the pending issues regarding Homogeneous Charge Compression Ignition (HCCI) engines is high load operation limit constrained by excessive pressure rise rates (PRRs). The present study investigates various measures to reduce combustion harness in a residual-affected HCCI engine. At the same time, the impact of those measures on efficiency...conference paper 2018