Browsing Waterloo Research by Author "Wright, John L."
Now showing items 1-20 of 61
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Assessing Convective Heat Transfer Coefficients Associated with Indoor Shading Attachments Using a New Technique Based on Computational Fluid Dynamics
Wright, John L.; Foroushani, Seyed Sepehr Mohaddes; Naylor, David; Collins, Michael R. (American Society of Heating, Refrigerating and Air-Conditioning Engineers, 2015-01)ASHRAE research project RP-1311 concluded with the creation of simulation models, the ASHWAT models, for glazing systems with shading attachments. Such assemblies are known as Complex Fenestration Systems (CFS). ASHWAT ... -
Asymmetric Graetz Problem: The Analytical Solution Revisited
Foroushani, Seyed Sepehr Mohaddes; Wright, John L.; Naylor, David (American Institute of Aeronautics and Astronautics, 2017-01-01)Forced-convective heat transfer from the walls of an asymmetrically heated channel to the fluid passing through in a laminar, hydrodynamically developed flow is known as the asymmetric Graetz problem. Several analytical ... -
Calculating Center-Glass Performance Indices of Glazing Systems with Shading Devices
Wright, John L. (American Society of Heating, Refrigerating and Air-Conditioning Engineers, 2008)Building energy consumption and loads are strongly influ-enced by solar gain and heat transfer through the centre-glass area of windows. Methods have been devised to calculate the corresponding energy performance indices ... -
Calculating Center-Glass Performance Indices of Windows
Wright, John L. (American Society of Heating, Refrigerating and Air-Conditioning Engineers, 1998)Building envelope performance is strongly influenced by solar gain and heat transfer through windows. The majority of this energy gain or loss passes through the center-glass area of the glazing system. Various methods ... -
Calculating Center-Glass Performance Indices of Windows with a Diathermanous Layer
Collins, Michael R.; Wright, John L. (American Society of Heating, Refrigerating and Air-Conditioning Engineers, 2006)The fenestration chapter of the 2005 ASHRAE Hand-book—Fundamentals (ASHRAE 2005) has long included methods for determining the U-factor and solar heat gain coef-ficient (SHGC), or window performance indices, using the ... -
Calculating the Solar Heat Gain of Window Frames
Wright, John L.; McGowan, Alexander G. (American Society of Heating, Refrigerating and Air-Conditioning Engineers, 1999)It is not practical to measure the solar heat gain of a window frame. It is more practical to do so by calculation. Typically, the frame solar heat gain is a small component of the total or is small in absolute terms so ... -
Calculating Window Solar Heat Gain
Wright, John L. (American Society of Heating, Refrigerating and Air-Conditioning Engineers, 1995-07)Window design has been revolutionized-largely by the introduction of low emissivity (low-e) coatings and substitute fill gases. The large number of design options necessitates the use of computer simulation for development ... -
A Comparison of Calculated and Measured Indoor-Side Window Temperature Profiles
Wright, John L.; McGowan, Alexander G. (American Society of Heating, Refrigerating and Air-Conditioning Engineers, 2003)Computer-generated surface temperature profiles are presented for the indoor side, vertical centerline of two windows and a calibration transfer standard (CTS). These specific configurations were chosen because they match ... -
Computer Simulation of Window Condensation Potential
McGowan, Alexander G.; Wright, John L. (American Society of Heating, Refrigerating and Air-Conditioning Engineers, 1998-12)Condensation on windows creates obscured view, can cause building damage, and may lead to mold growth and poor indoor air quality. The Canadian Standards Association (CSA) has developed new procedures to evaluate window ... -
Convective Heat Transfer In Hydrodynamically-Developed Laminar Flow In Asymmetrically-Heated Annuli: A Three-Temperature Problem
Wright, John L.; Naylor, David; Foroushani, Seyed Sepehr Mohaddes (2016-07)Heat transfer in hydrodynamically-developed flow in asymmetrically-heated channels and annuli has been studied extensively. This study is an extension of earlier work where heat transfer in an asymmetrically-heated ... -
A Correlation to Quantify Convective Heat Transfer Between Vertical Window Glazings
Wright, John L. (American Society of Heating, Refrigerating and Air-Conditioning Engineers, 1996)Several correlations have been used in recent years for the purpose of calculating convective, centre-glass heat transfer rates across gas-filled interpane window cavities. These correlations are examined and their background ... -
Demonstration Of New ESP-R Capability For Quantifying The Energy Savings Potential Of Window Shading Devices
Wright, John L.; Kotey, Nathan Amon; Lomanowski, Bartosz (2009-06)Buildings with highly glazed facades and well insulated, air-tight envelopes result in interior spaces that are highly sensitive to solar gain. Solar gain through glazing is the largest and most variable gain in buildings ... -
A Detailed Model to Determine the Effective Solar Optical Properties of Draperies
Kotey, Nathan Amon; Wright, John L.; Collins, Michael R. (American Society of Heating, Refrigerating and Air-Conditioning Engineers, 2009)Drapes have the potential to reduce peak cooling load and annual energy consumption because they can be used to control solar gain. Thus, the need to model a drapes in a glazing system analysis is important. A detailed ... -
Determination of convective heat transfer for fenestration with between-the-glass louvered shades
Collins, Michael R.; Tasnim, Syeda Humaira; Wright, John L. (Elsevier, 2008-06-01)In previous work, a two-dimensional steady laminar natural convection model of a window cavity with between-panes louvers (i.e., slats) was developed by approximating the system as a vertical cavity with isothermal walls ... -
Determining Longwave Radiative Properties Of Flat Shading Materials
Kotey, Nathan Amon; Wright, John L.; Collins, Michael R. (2008-08)Solar gain through fenestration has a significant impact on building peak load and annual energy consumption. Shading devices, attached to fenestration, offer a cost effective strategy in controlling solar gain. The ... -
Determining Off-Normal Solar Optical Properties of Drapery Fabrics
Kotey, Nathan Amon; Collins, Michael R.; Wright, John L. (American Society of Heating, Refrigerating and Air-Conditioning Engineers, 2009)The determination of off-normal solar optical properties of drapery fabrics is particularly useful in modelling the effective solar optical properties of pleated drapery. Special sample holders were designed and fabricated ... -
Determining Off-Normal Solar Optical Properties of Insect Screens
Wright, John L.; Collins, Michael R.; Kotey, Nathan Amon (American Society of Heating, Refrigerating and Air-Conditioning Engineers, 2009)Shading attachments may have a strong influence on solar gain. The determination of off-normal solar optical properties of individual layers of glazing/shading systems is required in order to estimate this solar gain, which ... -
Determining Off-Normal Solar Optical Properties of Roller Blinds
Kotey, Nathan Amon; Wright, John L.; Collins, Michael R. (American Society of Heating, Refrigerating and Air-Conditioning Engineers, 2009)Solar gain through fenestration constitutes a significant portion of peak cooling load and annual energy consumption in buildings. As such, any reduction in solar gain translates into savings associated with the cost of ... -
Effective U-values and Shading Coefficients of Preheat/Supply Air Glazing Systems
Wright, John L. (1986-06)Research is documented which makes use of a computer program called VISION, This computer program was developed specifically to provide a detailed analysis of heat transfer occurring in glazing systems. VISION was modified ... -
Efficient Simulation Of Complex Fenestration Systems In Heat Balance Room Models
Wright, John L.; Barnaby, Charles S.; Niles, Philip; Rogalsky, Christine Jane (International Building Performance Simulation Association, 2011-11)The solar, longwave, and convective interactions between a window, its shading attachments and its surroundings constitute a complicated coupled heat balance problem that can entail significant computational intensity to ...