Abdelaziz Laouadi

National Research Council Canada | NRC · Construction research centre

Within Annex 80, there is a manifold need to use key performance indicators (KPI, i.e. performance met rics). This is relevant to all Subtasks. The “Task Group KPI” is established to coordinate and clarify the KPIs, used within Annex 80. The Task Group shall collect and coordinate KPIs, relevant to Resilient Cool ing. It shall develop and constantl...

This study explores the spatial variability of the thermal responses of older occupants' in indoor environments at various locations in Montreal, Canada. Urban climate in and around the city over an extreme heat event in 2018 is simulated at 1 km spatial resolution using Weather Research and Forecasting (WRF) model, and data for 29 long-term care b...

Due to age-related physiological changes, older people are more vulnerable than young people to heat or cold conditions. Predicting older people's thermal sensations is essential for controlling the built environment and avoiding extreme heat/cold injuries. Previous studies mainly focused on predicting the thermal sensation of young people, and the...

The two-node bioheat model is widely used in thermal comfort standards and design tools. In recent years, there have been many new experimental studies and thermoregulatory models developed under stressful heat or cold conditions, but those have not been tested under the two-node model structure. Furthermore, limited validation studies of the two-n...

The objective of this work was to compare the hygrothermal responses and the moisture performance of four wood-frame walls as predicted by four hygrothermal (HAM) simulation tools, namely: DELPHIN, WUFI, hygIRC and COMSOL. The four wall systems differ only in their cladding type; these were fibreboard, vinyl, stucco and brick. Three Canadian cities...

As part of the EBC Annex 80 - Resilient cooling of buildings activities, the Thermal Condition Taskforce was created, in April 2020. In coordination with all other groups and the Weather Data Taskforce, two objectives were set by the Annex leader Dr. Peter Holzer. Firstly, to define common thermal conditions to assess different cooling technologies...

In this study, a 1 km resolution Weather Research and Forecasting (WRF) model is developed for the Montreal city and validated by field monitored data. The validated model will be used to dynamically downscale future projections of climate made around the city to evaluate the overheating conditions based on building energy simulations. The indoor t...

It has been acknowledged that as outdoor temperature and relative humidity increase past threshold values, so do older people mortality and morbidity rates. Similarly, there exist indoor conditions of temperature (Tamb) and relative humidity (RH) that would pose a health-risk to older people when they are exposed to these conditions for extended pe...

Overheating in buildings arising from climatic extreme heat events has been identified as a health concern to vulnerable occupants. However, there have been very limited studies to generate suitable weather data to evaluate by simulation the overheating risk and its effect on the comfort and health of occupants. This paper develops a methodology to...

Exposure to hot and humid conditions results in physiological changes in metabolism, cardiac output and thermoregulation of the young adult and these changes deviate with elderly due to aging. The elderly population is more vulnerable than the healthy and young population due to age-weakened physiology and thermoregulatory functions. There are, how...

This document provides guidance on the use of heat, air and moisture transfer (hereinafter referred to as hygrothermal) models to provide results from which to infer the durability of building elements, which include building envelope materials, components and assemblies in opaque wall systems. It is intended for use by expert practitioners who hav...

Les Terrasses de la Chaudière (LTDLC) complex was designed by Arcop Associates and built by the Campeau Corporation between 1976 and 1978. It is the single largest federal office complex in Canada with a total rentable floor area of 142,353 square metres, and accommodates over 6,000 people. Since the construction of the complex, the exterior brick-...

This article presents the development of a methodology to measure the visible transmittance of complex configurations of tubular daylighting devices under direct sunlight, and conducts a comparison study between the measurements and computer simulations using the new optical model developed in the first part of the study. A large integrating box wa...

Tubular daylighting devices are systems that collect and channel daylight from building roofs into deep interior spaces. To meet high standards of building energy efficiency and glare-free indoor environments, tubular daylighting device technologies have been rapidly and continuously evolving over the past two decades. However, this pace has been c...

This article presents the development and validation of a simplified model to compute the thermal characteristics (solar heat gain coefficient and thermal conductance (U-factor)) and surface temperatures of tubular daylighting devices. The model takes into account the three modes of heat transfer: conduction, convection, and surface-to-surface radi...

Prismatic glazing is found in many building applications, such as complex fenestration systems to control solar heat gains and glare and re-direct sunlight to building interior spaces and daylighting (and lighting) systems to enhance their optical and lighting performance. However, modeling and simulation of such prismatic glazing has been a very d...

Domed cavities are found in many building applications, such as conventional skylights and tubular daylighting devices. Heat transfer through domed cavities is thus an important parameter for evaluating the energy performance rating of such skylight systems and in calculating the heating and cooling loads of buildings. Although there have been many...

This survey is one task under the NRC-IRC project “Development of Guidelines for Effective Solar Shadings of Residential Windows for Energy Efficiency and Occupant Comfort” (44-B3243). The purpose of this project is to develop guidelines for the use of internal reflective, mid-pane, and external insulating solar shadings on residential windows to r...

Domed skylights are important architectural design elements that deliver daylight and solar heat into buildings, and connect the building's occupants to the outdoor environment. Despite the widespread use of domed skylights, there is limited information on the convective heat transfer within cavities of multi-glazed domes. This information is requi...

Most building energy simulation programs do not take into account the effect of skylights on energy performance. This paper presents a numerical study on natural laminar convection within vertically eccentric domed cavities heated from the exterior surface. A commercial computational fluid dynamics package employing the control volume approach was...

Efficient radiant heating and cooling systems are promising technologies in slashing energy bills and improving occupant thermal comfort in buildings with low-energy demands such as houses and residential buildings. However, the thermal performance of radiant systems in buildings has not been fully understood and accounted for in currently availabl...

Thèse (Ph. D.)--Université de Sherbrooke, 1996. Comprend des réf. bibliogr.