Solid oxide fuel cells for ships: System integration concepts with reforming and thermal cycles

For decades, ships have been propelled by diesel engines. However, there are increasing concerns about their environmental impact. Fuel cells can provide an alternative to convert fuels directly into electricity, with high efficiencies and without hazardous emissions.<br/>Solid oxide fuel cells have a ceramic membrane, which functions at high...

Modelling Regional Power Grids for Large-Disturbance Stability Studies

Due to the shift in electrical energy generation from thermal synchronous generators towards various renewable sources, power system stability will become a more pressing issue in the near future. In this thesis, we explore possible improvements to the dynamic grid model currently used by TenneT TSO for large-disturbance stability studies,...

A model for controlled dosing of femto-litre volume liquids using hollow microcantilever

A hollow microcantilever is used instead of a conventional microcantilever to dispense and aspirate liquids in the femto-litre (10^-15 L) volume range in an atomic force microscope (AFM) setup. The inherent force sensing capability of the cantilever is used to monitor the fluid manipulation in-situ. At this small scale, parameters...

Integrated modelling for improving the design and operation of steam power plants

Power producing companies have faced a new situation following the development of unregulated electricity markets. Strong competition forces them to take power production costs into account more carefully in order to maintain or increase profits. Additionally, to promote the efforts to reduce CO2 emissions,legislation and taxation drives...

A multi-body dynamics approach to a cable simulator for kites

For the purpose of ultimately building a fully dynamic simulation of kites, an investigation is launched into a viable model of the cable with which the kite is attached to the ground. In the model proposed in this paper, only the slow modes of motion are taken into account due to the fact that only the slow motions have a real effect on the...

Steam boilers: Process models for improved operation and design

Biomass combustion can be an economic way to contribute to the reduction of CO2 emissions, which are a main suspect of the so-called greenhouse effect. In order to promote a widespread utilization of biomass combustion, operational problems like fuel treatment, slagging, fouling and corrosion have to be solved. There are few research initiatives...

Three-dimensional dynamic modelling of earthquake tremors: Memoirs of the Centre of Engineering Geology in the Netherlands, No. 200

In this research a three-dimensional dynamic elasto-plastic finite element model is developed to simulate earthquake response for a three-dimensional irregular topography in the city of Armenia, Colombia. Topographical and geomorphologic effects may be the cause for high local accelerations during the earthquake of January 1999. This effect has...

Control and Dynamic Modelling of Industrial Suspension Crystallizers

Proceedings of the fourth international working conference on dynamic modelling and information systems, Noordwijkerhout, The Netherlands, September 28-30 1994