Modelling the dynamic behaviour of a PEM fuel cell system

The research objective of this thesis is to simulate the dynamic behaviour of a proton exchange membrane (PEM) fuel cell system. The model will encompass the fuel cell stack and some simplified balance of plant components. It will focus on simulating the reactions of the cell and the system with regards to changes in the requested load.

Investigating the Theoretical Feasibility of Longitudinal Motion Control in Indoor Cycling Trainers

As the indoor cycling trainer industry keeps innovating, a cycling trainer that has a similar longitudinal motion to outdoor cycling does not yet exist. Therefore, this thesis aimed to design a simulator controller that can actively simulate longitudinal cycling motion and assess its performance in translating outdoor longitudinal cycling...

Control and Coordination of multiple BESS in a Low Voltage Distribution Network

The rapidly growing number of renewable energy technologies has started changing the infrastructure of the conventional energy sector, which was based on one-directional power flow. Bidirectional flows are created in the network with the integration of renewable technologies. The electricity network and system operators face many new challenges...

Necessity of non-rigid body models for launch vehicles

In previous research, the necessity of non-rigid body simulators was stated to be a requirement for long, slender bodies. However, it remains unclear for which vehicle design parameters non-rigid body effects become destabilising. A set of 2+N linearly independent equations of motions can be combined in a single matrix to determine the motion of...

Solar-assisted ground-source heat pump solutions for Dutch terraced houses: Investigation and modelling of SAGSHP technology as an alternative to traditional gas heating systems

In the last decades, the excessive increase in average global temperature related to a massive rise in greenhouse gas emissions showed the world how the fossil fuel society we live in today is drastically modifying and destroying the world we live in and is turning it in an un-habitable planet. Scientist all over the world made it clear that if...

Si-air Battery: Alkaline cell modelling in MATLAB (Simscape)

Renewable energy sources (RES) such as Solar and Wind energy rely on the availability of natural resources like sunlight in the case of Solar and wind speed in the case of Wind energy generation which is variable in nature. There are periods where there is excess energy production than needed and periods of energy shortage where not enough...

Extended semi-analytical model of bipolar hybrid stepper motor

The aim of this graduation thesis is to present a bipolar stepper motor semi-analytical model and compare its simulated motor dynamics. Stepper motor modeling has been successfully used to simulate motor performance and dynamics, yet, each modeling method holds advantages and disadvantages toward one another. In this thesis, the analytical...

Power-to-gas efficiency of a hydrogen back-up system governed by interruptible sources and services

Fossil fuel based energy systems are the main contributor to global warming. As new regulations come into place, a transition towards a more sustainable energy system must be realised. Hydrogen usage is regarded as the key enabler of such systems. The heart of these hydrogen-based energy systems (HESs) is the hydrogen back-up system (HBS) which...

Daytime radiative cooling: A new passive cooling method for dwellings in the Mediterranean island of Cyprus

Daytime radiative cooling (DRC) is a very novel passive cooling method for buildings that utilises the recent technological advance in wavelength selective-emittance material research and takes advantage of a transparency window that exists in the atmosphere between 8 and 13 μm. Application of DRC in locations where warm weather prevails for...

Heave reduction of the crane tip of a J-class vessel by inducing a roll moment using active ballast systems

To compensate the heaving motion of a payload during deep water offshore installations, hanging from an on-board crane on a monohull vessel, a new concept is being investigated. By actively rolling the vessel using ballasting systems, the coupled heave motion of the crane tip can be reduced significantly. This is investigated by building a...

Modeling and validation of the Flex Power Grid Laboratory

The increasing penetration of dispersed generation changes the way in which distribution grids are comprised. The impact of the introduction of grid-connected distributed energy resources is expected to receive growing attention in the near future. Power electronic equipment is now indispensable part of the electricity generation and...

Fundamentals, Specifications, Architecture and Hardware Towards a Navigation System Based on Radio Pulsars

Pulsar based navigation is a novel area of research, and might once offer the possibility to man of safely traveling distances much beyond Earth. Recently, there has been work on a receiver tracking algorithm that makes use of X-ray pulsar signals. However, a system based on this would not find use on celestial bodies where an atmosphere blocks...