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This paper presents a simulation-based analysis of hybrid and plug-in hybrid propulsion system concepts for diesel-electric multiple unit regional railway vehicles. These alternative concepts primarily aim to remove emissions in terminal stops with longer stabling periods, with additional benefits reflected in the reduction of overall fuel consumption, produced emissions, and monetary costs. The alternative systems behavior is modeled using a backward-looking quasi-static simulation approach, with the implemented energy management strategy based on a finite state machine control. A comparative assessment of alternative propulsion systems is carried out in a case study of a selected regional railway line operated by Arriva, the largest regional railway undertaking in the Netherlands. The conversion of a standard diesel-electric multiple unit vehicle, currently operating on the network, demonstrated a potential GHG reduction of 9.43–56.92% and an energy cost reduction of 9.69–55.46%, depending on the type of service (express or stopping), energy storage technology selection (lithium-ion battery or double-layer capacitor), electricity production (green or grey electricity), and charging facilities configuration (charging in terminal stations with or without additional charging possibility during short intermediate stops) used. As part of a bigger project aiming to identify optimal transitional solutions towards emissions-free trains, the outcomes of this study will help in the future fleet planning., Transport and Planning

This paper presents a simulation-based analysis of hybrid and plug-in hybrid propulsion system concepts for diesel-electric multiple unit regional railway vehicles. These alternative concepts primarily aim to remove emissions in terminal stops with longer stabling periods, with additional benefits reflected in the reduction of overall fuel consumption, produced emissions, and monetary costs. The alternative systems behavior is modeled using a backward-looking quasi-static simulation approach, with the implemented energy management strategy based on a finite state machine control. A comparative assessment of alternative propulsion systems is carried out in a case study of a selected regional railway line operated by Arriva, the largest regional railway undertaking in the Netherlands. The conversion of a standard diesel-electric multiple unit vehicle, currently operating on the network, demonstrated a potential GHG reduction of 9.43–56.92% and an energy cost reduction of 9.69–55.46%, depending on the type of service (express or stopping), energy storage technology selection (lithium-ion battery or double-layer capacitor), electricity production (green or grey electricity), and charging facilities configuration (charging in terminal stations with or without additional charging possibility during short intermediate stops) used. As part of a bigger project aiming to identify optimal transitional solutions towards emissions-free trains, the outcomes of this study will help in the future fleet planning., Transport and Planning

A Master of Science thesis in Mechanical Engineering by Zaid Al Rayes entitled, “Development of an Optimization Scheme for A Fixed-Wing UAV Long Endurance with PEMFC and Battery”, submitted in May 2018. Thesis advisor is Dr. Mohamed Gadalla. Soft and hard copy available., Unmanned aerial vehicles (UAVs) and fuel cell industries are seeking to enhance the capability and performance of UAVs powered by fuel cells as propulsion systems. Tasks such as surveillance and land surveying increased the need to improve UAVs flight characteristics especially its endurance. The design for long endurance UAVs along with its integrated propulsion system components should be carefully designed and optimized. In this thesis, an optimization approach is developed to obtain optimal flight endurance. The proposed approach includes a component-level, a subsystem-level as well as a system-level modeling. For the component level modeling, models of all propulsion system components are developed based on real physical models. In the subsystem level modeling, fuel cell subsystems are integrated in a single model that is verified through experiments to obtain its polarization curve. The hybrid subsystem is then integrated through a developed energy management scheme. For the system level modeling, multi-disciplinary design analysis (MDA) is developed for different case studies that include steady level mission and climb flights. This model is solved using a nonlinear solver function of the MATLAB tool box (fsolve). The optimization scheme for all UAV design variables uses a genetic algorithm on the outer loop of the optimization routine to search for the optimal solution using the developed MDA as a fitness function. The optimization selects wing airfoil, hydrogen tank, battery, motor, gear reduction and propeller from different possible combinations to maximize the endurance of a UAV. The combination of propellers with larger diameters and motors with lower voltage constants resulted in higher overall system performance. The fuel cell model that depends on a simple polarization curve test demonstrated good agreement with experimental results. To reduce the uncertainty in the propeller modeling, the propeller-fuselage interference is considered to produce more, College of Engineering, Department of Mechanical Engineering

This paper will incorporate product development methodology from the FED program where AVL is responsible in collaboration with World Technical Services Inc., for delivering a fully developed hybrid propulsion system integrated into the demonstrator vehicle. Specifically, the paper will discuss via case study the unique methodology employed by AVL Powertrain to develop, validate, and integrate our hybrid propulsion system into the FED vehicle. Content will include traditional and virtual powertrain development methodologies that maximize product development efficiency, ensure a robust final design, and minimize development costs. Hybrid controls development, calibration techniques and vehicle design issues will also be discussed.

Hlavním cílem této práce je možný model řešení hybridního pohonu pro vozidla MHD. Důvodem je velký zájem výrobců o tuto problematiku a perspektiva této konstrukce v nejbližších letech. Zavedení těchto vozidel by mělo pozitivní vliv na ekologii a ekonomii provozu, stejně jako na zlepšení trakčních a dynamických vlastností. Výsledkem práce je návrh daného modelu, zhodnocení ekologického dopadu a ekonomičnost daného projektu. Dále je zde uveden přehled možných zdrojů elektrické energie, stručný přehled současných autobusů s těmito pohony a pokud byly dostupné, tak i jejich parametry. Podklady pro tuto práci tvoří především zahraniční odborná literatura a informace ze sítě internet., The main objective of this thesis is a possible solution of a hybrid driving mechanism for public transport vehicles. The purpose is a strong producers´ interest in these problems, and the perspective of this construction in coming years. Using these vehicles would positively influence ecology and operating economy, as well as the improvement of traction and dynamic qualities. The result of the thesis is a particular model concept, evaluating the ecological impact, and the particular project economics. Furthermore, a survey of possible electricity sources, a brief survey of present buses using these driving mechanism and their parameters if available, are introduced. All the data used for this thesis are mostly acquired in foreign technical literature and in the internet., Katedra dopravních prostředků a diagnostiky, Dokončená práce s úspěšnou obhajobou