Time filter

Source Type

Longueuil, Canada

Dansereau R.,HVAC | Bourdages C.,Dessau
ASHRAE Journal | Year: 2012

The Université de Sherbrooke's new Longueuil Campus emerged as one of the tallest structures on Montreal's South Shore in Canada decorated with a 16-story glass tower. The university sought to offer an open study environment to encourage interdisciplinary mingling and promote the development of new and emerging disciplines, inspired by an innovative view on education. The campus' bold architectural design focused on open spaces and gathering areas to promote a sense of community and cohabitation throughout the grounds. Its translucent building envelope maximized the use of natural light and enhances a majestic view of the green rooftop oasis. The new building bridges the gap between man-made structure and its environment by blurring traditional boundaries between indoor and outdoor spaces. Mechanical designers worked with architects to select a low SHGC glass to reduce summer cooling loads and downsize overall cooling equipment, increasing occupant comfort in the process. Source

Moreau V.,CIRAIG | Bage G.,Dessau | Marcotte D.,Ecole Polytechnique de Montreal | Samson R.,CIRAIG
Journal of Cleaner Production | Year: 2012

In evaluating the impacts of products and processes, life cycle assessment has taken a prominent role. Missing data, however, continue to affect the completeness and accuracy of such environmental assessment tools. Data are missing for many reasons, for specific processes, at random in existing inventories or worse, nonexistent. This article proposes a statistical approach to address the lack of data in life cycle inventories and applies it to hydroelectric power plants. Among large power production technologies, hydroelectricity varies considerably in scale and from one site to another. The procedure relies on relationships between the technical properties of a system or process, in this case hydropower plants, and the embodied material and energy flows in construction, operation and eventually dismantling. With highly flexible estimators known as kriging, predicting the value of material and energy flows becomes more accurate. From relatively small sample sizes, kriging allows better estimation without averaging out any of the observed data. Similarly, parameter estimation and model validation can be performed through cross validation which assumes very little on the data itself. Calculations of mean absolute errors for various forms of kriging and regression show that the former estimates the values of material and energy flows more accurately than the latter, more so in cases of incomplete data. Accounting for several technical characteristics as well as joint estimation of covariate material and energy flows provide different ways to further reduce the errors and improve the completeness of inventories where data are missing. The specificity of hydroelectric power makes existing inventory data largely unrepresentative and kriging offers new possibilities to increase the reliability of estimated, representative data. © 2012 Elsevier Ltd. All rights reserved. Source

David E.,Ecole de Technologie Superieure of Montreal | Frechette M.,Hydro - Quebec | Zazoum B.,Ecole de Technologie Superieure of Montreal | Daran-Daneau C.,Dessau | And 2 more authors.
Journal of Nanomaterials | Year: 2013

Polyethylene/nanoclay specimens containing from 0 to 5% nanoclays were prepared from a commercially available premixed PE/nanoclay masterbatch containing 50% wt of nanoclay. The masterbatch was diluted to the desired concentration by adding PE along with various amounts of compatibilizer in order to achieve the best possible dispersion of the nanoclay platelets. The dielectric response of the compounded samples was investigated using a combination of time and frequency-domain spectroscopy in order to cover a wide frequency window. Both techniques were in good agreement when the time-domain data was transformed into frequency-domain data. Despite their low concentration, the addition of the dispersed nanoclays led to a significant alteration of the material dielectric response in the form of the appearance of various interfacial relaxation processes and an increase of charge carrier transport within the insulation material. Moreover, an onset of nonlinear charge transport process was observed at moderate fields for specimens containing a relatively low level of nanoclays. The high-field breakdown strength was shown to have been improved by the incorporation of the nanoparticles, particularly when the exfoliation was enhanced by the use of a maleic anhydride grafted polyethylene compatibilizer. © 2013 E. David et al. Source

Bourdages C.,Dessau | Brodeur O.,Dessau
ASHRAE Journal | Year: 2012

The Cartierville YMCA offered aquatic, sports and recreation facilities. The project was made possible due to an innovative public-community partnership between the Quebec government, the City of Montreal, and the YMCA. The owners mandated an energy-efficient HVAC design that would become a focal point of this environment-friendly building. The mechanical engineering team was able to craft a self-financing project designed to reduce energy consumption by 54% by combining renewable geothermal energy and heat recovery systems. Energy simulation models were used to evaluate different scenarios to help designers target the most energy and cost-efficient HVAC systems. The simulation software simultaneously considered weather data, building envelope parameters, and complex building HVAC system interactions. Source

Lefebvre D.,Dessau | Richard G.,Dessau
WCTE 2014 - World Conference on Timber Engineering, Proceedings | Year: 2014

This article outlines the process and challenges involved in designing and building a new structure to span the Uupaachikus Pass in Mistissini, Quebec. The 160-metre-long bridge was designed using semi-continuous arches made of glued laminated wood (glulam) girders. The bridge is 9.25 metres wide and has spans of 37, 43, 43 and 37 metres. The glulam bridge features straight girders with a maximum length of 24 metres attached to 15-metre arched girders by means of steel plate assemblies. The arches are connected to the piers and abutments using pins. Source

Discover hidden collaborations