Ventilative Cooling
... The IEA co-ordinates research and development in a number of areas related to energy. The mission of one of those areas, the EBC - Energy in Buildings and Communities Programme, is to develop and facilitate the integration of technologies and processes for energy efficiency and conservation into hea ...
... The IEA co-ordinates research and development in a number of areas related to energy. The mission of one of those areas, the EBC - Energy in Buildings and Communities Programme, is to develop and facilitate the integration of technologies and processes for energy efficiency and conservation into hea ...
Passivhaus primer: Designer`s guide A guide for the design team
... form have higher A/V ratios than their larger counterparts. It is therefore particularly important to design small detached buildings with a very compact form, whilst larger buildings offer the designer greater freedom to explore more complex geometries. Figure 1 illustrates the influence of form an ...
... form have higher A/V ratios than their larger counterparts. It is therefore particularly important to design small detached buildings with a very compact form, whilst larger buildings offer the designer greater freedom to explore more complex geometries. Figure 1 illustrates the influence of form an ...
BESTFAÇADE Best Practice for Double Skin Façades EIE/04/135
... temperature extremes, winds, and sound. Sun-shading devices are often located between the two skins. All elements can be arranged differently into numbers of permutations and combinations of both solid and diaphanous membranes”.1 “The Double Skin Façade is a system consisting of two glass skins plac ...
... temperature extremes, winds, and sound. Sun-shading devices are often located between the two skins. All elements can be arranged differently into numbers of permutations and combinations of both solid and diaphanous membranes”.1 “The Double Skin Façade is a system consisting of two glass skins plac ...
Smoke and Fire Gases Venting in Large Industrial Spaces and Stores
... mechanical exhaust ventilation of the fire volume, providing from four to six air changes per hour, is also recommended. It is expected that this rate of air flow will remove smoke at approximately the same rate as it is produced. This system is expected to maintain the interface between the smoke l ...
... mechanical exhaust ventilation of the fire volume, providing from four to six air changes per hour, is also recommended. It is expected that this rate of air flow will remove smoke at approximately the same rate as it is produced. This system is expected to maintain the interface between the smoke l ...
Building Air Quality: A Guide for Building Owners and Facility
... problems, and other elements of the building environment. A healthy indoor environment is one in which the surroundings contribute to productivity, comfort, and a sense of health and well being. The indoor air is free from significant levels of odors, dust and contaminants and circulates to prevent ...
... problems, and other elements of the building environment. A healthy indoor environment is one in which the surroundings contribute to productivity, comfort, and a sense of health and well being. The indoor air is free from significant levels of odors, dust and contaminants and circulates to prevent ...
Aalborg Universitet Cooling of the Building Structure by Night-time Ventilation Artmann, Nikolai
... Europe. However, due to the inherent stochastic properties of weather patterns, series of warmer nights can occur at some locations, where passive cooling by night-time ventilation alone might not be sufficient to guarantee thermal comfort. Possible time-dependent changes in CCP were assessed for th ...
... Europe. However, due to the inherent stochastic properties of weather patterns, series of warmer nights can occur at some locations, where passive cooling by night-time ventilation alone might not be sufficient to guarantee thermal comfort. Possible time-dependent changes in CCP were assessed for th ...
FINAL REPORT OF THE MONTGOMERY COUNTY PUBLIC SCHOOLS March 4, 1998
... adequate. There is no organized knowledge of how each class of equipment is supposed to operate or function, nor are there documented records of when such equipment has been inspected, cleaned, and repaired. The PAT recommends that the school-based building maintenance plans become the centerpiece o ...
... adequate. There is no organized knowledge of how each class of equipment is supposed to operate or function, nor are there documented records of when such equipment has been inspected, cleaned, and repaired. The PAT recommends that the school-based building maintenance plans become the centerpiece o ...
Overheating in new homes
... and building control, exhibit the same design and construction characteristics as existing dwellings where high temperatures are known to have caused harm to health and well-being. An accepted definition of what constitutes overheating is needed, so that designers, assessors and surveyors can predic ...
... and building control, exhibit the same design and construction characteristics as existing dwellings where high temperatures are known to have caused harm to health and well-being. An accepted definition of what constitutes overheating is needed, so that designers, assessors and surveyors can predic ...
Residential Attic Ventilation In A Hot And Humid Climate
... The reality of the effect of natural ventilation in a residential attic cavity has been the topic of many debates and scholarly reports since the 1930’s. The purpose of ventilating an attic cavity is to prevent collection of condensate on the structural surfaces, and to create a thermal buffer betwe ...
... The reality of the effect of natural ventilation in a residential attic cavity has been the topic of many debates and scholarly reports since the 1930’s. The purpose of ventilating an attic cavity is to prevent collection of condensate on the structural surfaces, and to create a thermal buffer betwe ...
Engineering Issue: Indoor Air Vapor Intrusion Mitigation - CLU-IN
... http://irc.nrc-cnrc.gc.ca/pubs/cbd/cbd104_e.html). Negative pressures in a building can also be enhanced by mechanical systems such as heating and cooling systems, exhaust fans (including those built into stoves or grills), clothes dryers, central vacuums and combustion devices, especially fireplace ...
... http://irc.nrc-cnrc.gc.ca/pubs/cbd/cbd104_e.html). Negative pressures in a building can also be enhanced by mechanical systems such as heating and cooling systems, exhaust fans (including those built into stoves or grills), clothes dryers, central vacuums and combustion devices, especially fireplace ...
An assessment of thermal comfort in a warm and humid
... cold) for the two types of classrooms were 26.8ºC and 27.4ºC. As important as these studies are, their findings have not yet emerged into comprehensive and widely accepted guidelines for tropical naturally ventilated buildings [22]. In reality, occupants are comfortable in a wider range of condition ...
... cold) for the two types of classrooms were 26.8ºC and 27.4ºC. As important as these studies are, their findings have not yet emerged into comprehensive and widely accepted guidelines for tropical naturally ventilated buildings [22]. In reality, occupants are comfortable in a wider range of condition ...
Document
... Abstract. Early design decisions with regard to building facade characteristics play a significant role in the resulting building's thermal performance. In this context, external metal mesh screens used as a permanent second facade skin- are a rather new shading alternative, particularly in nonresid ...
... Abstract. Early design decisions with regard to building facade characteristics play a significant role in the resulting building's thermal performance. In this context, external metal mesh screens used as a permanent second facade skin- are a rather new shading alternative, particularly in nonresid ...
PROCEEDINGS Editors: Marcel Loomans, Eindhoven University of Technology Marije te Kulve, Maastricht University
... thermal modelling and a new-defined performance indicator called indoor overheating degree (IOD). The dwelling cases represent 9,216 possible combinations of archetypes, orientations, fabric-characteristics, shading options, ventilation rates, internal-heat gains, and adaptation opportunities consis ...
... thermal modelling and a new-defined performance indicator called indoor overheating degree (IOD). The dwelling cases represent 9,216 possible combinations of archetypes, orientations, fabric-characteristics, shading options, ventilation rates, internal-heat gains, and adaptation opportunities consis ...
Aalborg Universitet ventilation systems
... thermal modelling and a new-defined performance indicator called indoor overheating degree (IOD). The dwelling cases represent 9,216 possible combinations of archetypes, orientations, fabric-characteristics, shading options, ventilation rates, internal-heat gains, and adaptation opportunities consis ...
... thermal modelling and a new-defined performance indicator called indoor overheating degree (IOD). The dwelling cases represent 9,216 possible combinations of archetypes, orientations, fabric-characteristics, shading options, ventilation rates, internal-heat gains, and adaptation opportunities consis ...
Multizone Air Flow Modelling (COMIS) - IEA-EBC
... flow characteristics are well understood, and it is driven by fans with known pressure-flow characteristics. Techniques and calculation methods have been developed for the design and sizing of such systems. Much more difficult is the prediction of the general movement of air both within and between ...
... flow characteristics are well understood, and it is driven by fans with known pressure-flow characteristics. Techniques and calculation methods have been developed for the design and sizing of such systems. Much more difficult is the prediction of the general movement of air both within and between ...
Occupant comfort in UK offices—How adaptive comfort theories
... and along 30% of a wall facing north-east into a large light well. The refurbishment was based around a mixed mode strategy for managing the internal environment using natural ventilation (NV) through grilles set under new windows and night time ventilation, to reduce energy and CO2 emissions, but w ...
... and along 30% of a wall facing north-east into a large light well. The refurbishment was based around a mixed mode strategy for managing the internal environment using natural ventilation (NV) through grilles set under new windows and night time ventilation, to reduce energy and CO2 emissions, but w ...
HARDLINE - ABC Ventilation Systems
... REDUCING CARBON EMISSIONS HardLine Performance Ducting compresses down smaller than steel or fiberglass for transportation and storage. The carbon footprint is significantly lowered when transporting HardLine compared with other rigid products. The chart below is an example of area required to ship ...
... REDUCING CARBON EMISSIONS HardLine Performance Ducting compresses down smaller than steel or fiberglass for transportation and storage. The carbon footprint is significantly lowered when transporting HardLine compared with other rigid products. The chart below is an example of area required to ship ...
Single-sided Natural Ventilation: Design Analysis
... Typically, the energy cost of a naturally ventilated building is 40% less than that of an air-conditioned building [5]. Natural ventilation, therefore, contributes to a sustainable environment by reducing energy use in buildings. Recent surveys have suggested that some building occupants prefer spac ...
... Typically, the energy cost of a naturally ventilated building is 40% less than that of an air-conditioned building [5]. Natural ventilation, therefore, contributes to a sustainable environment by reducing energy use in buildings. Recent surveys have suggested that some building occupants prefer spac ...
Air Transport in Building Envelope and Construction Process
... moisture and air quality problems. Nevertheless, an overall systems approach, building physics design, building process and workmanship are still mostly missing. Lately, however, a certain increase in understanding the ...
... moisture and air quality problems. Nevertheless, an overall systems approach, building physics design, building process and workmanship are still mostly missing. Lately, however, a certain increase in understanding the ...
Glossary
... This is the time for all of the air in a room to be changed, and is equal to twice the room mean age. (See air change efficiency; coefficient of air change performance; local air change index; nominal time constant; room mean age ; specific flow) air channel ( See flow path) air-conditioning (Also k ...
... This is the time for all of the air in a room to be changed, and is equal to twice the room mean age. (See air change efficiency; coefficient of air change performance; local air change index; nominal time constant; room mean age ; specific flow) air channel ( See flow path) air-conditioning (Also k ...
public deliverables - Climate for Culture
... Another example of reusing the existing chimneys is presented in chapter six, where a newly developed ventilating concept for Linderhof palace is described. Alternative ventilation strategies were investigated computationally and compared regarding climatic stability a ...
... Another example of reusing the existing chimneys is presented in chapter six, where a newly developed ventilating concept for Linderhof palace is described. Alternative ventilation strategies were investigated computationally and compared regarding climatic stability a ...
Natural Ventilation for Infection Control in Health
... Infection risk with 15 minutes exposure with different ventilation rates and quanta generation for an infector entering an enclosed space with a dimension 6 m × 6.7 m × 2.7 m................................................. 88 ...
... Infection risk with 15 minutes exposure with different ventilation rates and quanta generation for an infector entering an enclosed space with a dimension 6 m × 6.7 m × 2.7 m................................................. 88 ...
Tax Office of Enschede
... measured at different locations in the rooms. Based on these results the ventilation rate was determined. ...
... measured at different locations in the rooms. Based on these results the ventilation rate was determined. ...
Thermal Performance of Tropical Atrium
... III. SOFTWARE VERIFICATION AND VALIDATION The applications of CFD models are not limited to ventilation aims in buildings, and it is known as a method to predict different parameters of thermal comfort, indoor air quality, fire safety, HVAC system performance and more in different types of buildings ...
... III. SOFTWARE VERIFICATION AND VALIDATION The applications of CFD models are not limited to ventilation aims in buildings, and it is known as a method to predict different parameters of thermal comfort, indoor air quality, fire safety, HVAC system performance and more in different types of buildings ...
Heat recovery with hybrid ventilation in office
... Natural ventilation is used more often. The new office buildings created in the Netherlands have to fulfil the demands of Dutch government. The goal of the Dutch government is to create almost zero energy buildings at around 2018 (Agentschap NL, 2013). Not only in the production of energy but also i ...
... Natural ventilation is used more often. The new office buildings created in the Netherlands have to fulfil the demands of Dutch government. The goal of the Dutch government is to create almost zero energy buildings at around 2018 (Agentschap NL, 2013). Not only in the production of energy but also i ...
Ventilation (architecture)
Ventilating (the V in HVAC) is the process of ""processing"" or replacing air in any space to provide high indoor air quality (i.e. to control temperature, replenish oxygen, or remove moisture, odors, smoke, heat, dust, airborne bacteria and carbon dioxide). Ventilation is used to remove unpleasant smells and excessive moisture, introduce outside air, to keep interior building air circulating, and to prevent stagnation of the interior air.Ventilation includes both the exchange of an air to the outside as well as circulation of air within the building. It is one of the most important factors for maintaining acceptable indoor air quality in buildings. Methods for ventilating a building may be divided into mechanical/forced and natural types.""Mechanical"" or ""forced"" ventilation is used to control indoor air quality. Excess humidity, odors, and contaminants can often be controlled via dilution or replacement with outside air. However, in humid climates much energy is required to remove excess moisture from ventilation air.Ventilation increases the energy needed for heating or cooling, however heat recovery ventilation can be used to mitigate the energy consumption. This involves heat exchange between incoming and outgoing air. Energy recovery ventilation additionally includes exchange of humidity.Kitchens and bathrooms typically have mechanical exhaust to control odors and sometimes humidity. Kitchens have additional problems to deal with such as smoke and grease (see kitchen ventilation). Factors in the design of such systems include the flow rate (which is a function of the fan speed and exhaust vent size) and noise level. If ducting for the fans traverse unheated space (e.g., an attic), the ducting should be insulated as well to prevent condensation on the ducting. Direct drive fans are available for many applications, and can reduce maintenance needs.Ceiling fans and table/floor fans circulate air within a room for the purpose of reducing the perceived temperature because of evaporation of perspiration on the skin of the occupants. Because hot air rises, ceiling fans may be used to keep a room warmer in the winter by circulating the warm stratified air from the ceiling to the floor. Ceiling fans do not provide ventilation as defined as the introduction of outside air.Natural ventilation is the ventilation of a building with outside air without the use of a fan or other mechanical system. It can be achieved with openable windows or trickle vents when the spaces to ventilate are small and the architecture permits. In more complex systems warm air in the building can be allowed to rise and flow out upper openings to the outside (stack effect) thus forcing cool outside air to be drawn into the building naturally through openings in the lower areas. These systems use very little energy but care must be taken to ensure the occupants' comfort. In warm or humid months, in many climates, maintaining thermal comfort solely via natural ventilation may not be possible so conventional air conditioning systems are used as backups. Air-side economizers perform the same function as natural ventilation, but use mechanical systems' fans, ducts, dampers, and control systems to introduce and distribute cool outdoor air when appropriate.