In order to provide more reliable electricity, facilitate clean enery integration and supply energy to remote communitites, part of the power grid may be required to operate autonomously. Microgrids which can be islanded from teh main grid, are deployed for this purpose. However, the compositions and objectives of microgrids vary in different applications and operating […]

Oil that has passed through the bearings and gearboxes of aircraft engines is recycled by a specialized oil scavenging system that separates droplets dispersed from the shaft from air and particulate matter. This process helps to mitigate the emissions of aircraft engines, greatly improves oil consumption and Improves working life by improving the cooling capabilities […]

In a previous study, the combination of water electrolysis with tri-reforming of methane for methanol production was evaluated. Results from the process simulation demonstrated that a net negative carbon emission process could be achieved without compromising productivity. To make further improvements, the main objective of this current project is to carry out energy optimization on […]

La production de l’énergie électrique nécessite des actuateurs mécaniques de grande puissance. Au Canada, la puissance mécanique provient principalement des turbines hydrauliques activées par les rivières. Cependant, dans plusieurs pays, elle provient des turbines thermiques qui utilisent de la vapeur générée par des centrales à combustibles fossiles ou nucléaires. En Amérique du Nord, plusieurs de […]

Corrosion, mechanical damage and cracking are the primary causes of pipeline incidents in Canada. Major incidents can significant impact the public, wildlife, and environment. Over the past ten years, the length of pipelines has increased 11 per cent, but the number of pipeline incidents has decreased 48 per cent. This is largely due to continuous […]

Electric power is almost entirely transmitted through polymer insulated cables or wires in every home, factory, plant, or apparatus. If the temperature of a cable increases, it would be an indication that some accidents or malfunctions such as inflow of excess electric current occur in the cable. The generated heat, indeed, degrades the polymer insulations […]

Les systèmes de production d’énergie basés sur l’utilisation de la force hydraulique utilisent une machine synchrone afin de convertir l’énergie mécanique en énergie électrique. Pour que ces machines fonctionnent, il faut fournir une puissance d’excitation sur la partie tournante de la machine (que l’on nomme système d’excitation.) Ce système d’excitation peut produire des courants électriques […]

Surface degradation during Oil & Gas and Mining operations in the Province of Alberta are pervasive. This has resulted in extensive research and development activities into the development of advanced surface modifications that are based on overlays and coatings. Most research effort has focused on materials selection, fabrication, and optimization of wear performance of those […]

Les sources de production d’énergie font appel à des éléments d’électronique de puissance permettant une gestion de l’énergie électrique produite. Il peut s’agir par exemple de convertisseurs transformant une tension alternative en tension continue, ou inversement. Ils servent de plus à définir correctement les caractéristiques électriques (tension et courant) mises en oeuvre dans les réseaux […]

In the operation of CANDU reactors, the Zr-2.5Nb pressure tubes holding the cooling water and fuel bundles are susceptible to hydride cracking-induced crack initiation mechanisms, known as delayed hydride cracking and overload crack initiation. For structural integrity evaluation of CANDU pressure tubes, of fracture toughness and hydride crack initiation models were developed. However, the hydride […]

For the realization of amplifiers with ultra-high control bandwidth, typically the series connection of high-frequency PWM H-bridges is considered in order to simultaneously achieve multi-level voltages and high effective switching frequency, which enables the required high cut-off frequency of the output filter and, thus, facilitates high control bandwidth. However, the approach is of high complexity, […]

Closed-loop control of nonlinear systems is typically performed by combining a number of linear controllers, each designed to perform well around an operating point. Although this solution generally works in many cases, there are some important practical applications, e.g. in diesel engine control or in robotics in which it fails and leads to serious performance […]