INTRODUCTIONGreen building design can be a complex process, and windows are an important part of that process. A wide rangeof performance parameters can make selecting the right options diffi cult, and some parameters...INTRODUCTIONGreen building design can be a complex process, and windows are an important part of that process. A wide rangeof performance parameters can make selecting the right options diffi cult, and some parameters provide confl ictingperformance trade-offs. Good information about how to design green windows is not readily available, as most peoplelook through windows, but not many people look at them. Designed correctly, windows can greatly enhance the occupants’enjoyment of the space and enhance the energy performance of the entire building. Designed incorrectly,windows can be a source of irreparable failing of the building to meet the occupants’ requirements for comfort, energyeffi ciency, and long-term durability of the building envelope.This article discusses the physics behind window performance, describes some of the design parameters, and explainshow to determine whether you can get the performance you want on site. This is not meant to be an exhaustivereference on the subject, as that would require several books. Rather, the intent is to provide an overview of thephysical behavior of window components, so that appropriate design choices are based on sound knowledge and notguesswork. This article also provides some fl uency with window-performance terminology for use in discussing designoptions with specialists.展开更多
INTRODUCTION Passive ventilation employs a set of strategies,potentially including building shape,internal confi guration,orientation,aperture size and position,and microclimate design,to direct air through a building...INTRODUCTION Passive ventilation employs a set of strategies,potentially including building shape,internal confi guration,orientation,aperture size and position,and microclimate design,to direct air through a building without the assistance of fans or pumps.Passive ventilation has received widespread attention in green building design,particularly in mild climates,because of its great potential to reduce cooling costs.The challenge of predicting airfl ow speed and direction within a building has encouraged development of sophisticated computational simulation tools,and the resulting confi dence has,in turn,led to the design of passive and passive/mechanical hybrid ventilation systems in increasingly extreme climates.The Harm A.Weber Academic Center possesses one of the most ambitious hybrid ventilation systems in the world:in the hot continental climate of the midwestern United States,this building integrates passive and mechanical systems into a single network of airfl ow pathways.Aperture openings for the system are controlled automatically,using information provided by numerous internal and external sensors,such that the building can make use of multiple hybrid modes to utilize the cooling power of outdoor air to the greatest extent possible.During August 2007,shortly after the peak of the local cooling season,when the building was expected to be under mechanical control,this investigation of the airfl ow and thermal properties of the new building was undertaken to provide useful information about its early performance.展开更多
文摘INTRODUCTIONGreen building design can be a complex process, and windows are an important part of that process. A wide rangeof performance parameters can make selecting the right options diffi cult, and some parameters provide confl ictingperformance trade-offs. Good information about how to design green windows is not readily available, as most peoplelook through windows, but not many people look at them. Designed correctly, windows can greatly enhance the occupants’enjoyment of the space and enhance the energy performance of the entire building. Designed incorrectly,windows can be a source of irreparable failing of the building to meet the occupants’ requirements for comfort, energyeffi ciency, and long-term durability of the building envelope.This article discusses the physics behind window performance, describes some of the design parameters, and explainshow to determine whether you can get the performance you want on site. This is not meant to be an exhaustivereference on the subject, as that would require several books. Rather, the intent is to provide an overview of thephysical behavior of window components, so that appropriate design choices are based on sound knowledge and notguesswork. This article also provides some fl uency with window-performance terminology for use in discussing designoptions with specialists.
文摘INTRODUCTION Passive ventilation employs a set of strategies,potentially including building shape,internal confi guration,orientation,aperture size and position,and microclimate design,to direct air through a building without the assistance of fans or pumps.Passive ventilation has received widespread attention in green building design,particularly in mild climates,because of its great potential to reduce cooling costs.The challenge of predicting airfl ow speed and direction within a building has encouraged development of sophisticated computational simulation tools,and the resulting confi dence has,in turn,led to the design of passive and passive/mechanical hybrid ventilation systems in increasingly extreme climates.The Harm A.Weber Academic Center possesses one of the most ambitious hybrid ventilation systems in the world:in the hot continental climate of the midwestern United States,this building integrates passive and mechanical systems into a single network of airfl ow pathways.Aperture openings for the system are controlled automatically,using information provided by numerous internal and external sensors,such that the building can make use of multiple hybrid modes to utilize the cooling power of outdoor air to the greatest extent possible.During August 2007,shortly after the peak of the local cooling season,when the building was expected to be under mechanical control,this investigation of the airfl ow and thermal properties of the new building was undertaken to provide useful information about its early performance.
