Underfloor Air Distribution Ufad
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Underfloor Air Distribution Ufad Design Guide
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Author : Fred S. Bauman
language : en
Publisher: Bibliotheca Press
Release Date : 2003
Underfloor Air Distribution Ufad Design Guide written by Fred S. Bauman and has been published by Bibliotheca Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with Technology & Engineering categories.
This guide is ideal for HVAC design engineers, architects, building owners, facility managers, equipment manufacturers and installers, utility engineers, researchers, and other users of underfloor air distribution (UFAD) technology. UFAD systems are innovative methods for delivering space conditioning in offices and other commercial buildings. Improved Thermal Comfort, Improved Ventilation Efficiency and Indoor Air Quality, Reduced Energy Use and Reduced Life-Cycle Building Costs -- The guide explains these as some of the advantages that UFAD systems have over traditional overhead air distribution systems. This guide provides assistance in the design of UFAD systems that are energy efficient, intelligently operated, and effective in their performance. It also describes important research results that support current thinking on UFAD design and includes an extensive annotated bibliography for those seeking additional detailed information.
Ufad Guide
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Author : Ashrae
language : en
Publisher: Ashrae
Release Date : 2013
Ufad Guide written by Ashrae and has been published by Ashrae this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with Air conditioning categories.
"Guide provides assistance in the design of UFAD systems that are energy efficient, intelligently operated, and effective in their performance. It also describes important research results that support current thinking on UFAD design"--
Underfloor Air Distribution Ufad
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Author : Liangcai Tan
language : en
Publisher:
Release Date : 2008
Underfloor Air Distribution Ufad written by Liangcai Tan and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with Air conditioning categories.
This project covered the laboratory investigation phase of Task 2 where the performance and cost effectiveness of underfloor air distribution and conventional air distribution systems were compared.
Ufad O M Guide
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Author : American Society of Heating, Refrigerating and Air-Conditioning Engineers
language : en
Publisher:
Release Date : 2016
Ufad O M Guide written by American Society of Heating, Refrigerating and Air-Conditioning Engineers and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with Air conditioning categories.
As the use of underfloor air distribution (UFAD) systems increases,so does the importance of effective operation and maintenance (O&M) of these systems after installation. As UFAD technology is applied, designers, technicians, facility managers, and building owners or their representatives all need to know how to ensure that these often mission-critical systems operate as intended. This guide supplements UFAD Guide: Design, Construction and Operation of Underfloor Air Distribution Systems, providing specific, practical advice beyond design, construction, and startup into successful ongoing operation and maintenance. Installers, technicians, and building owners will find this booklet a valuable resource for getting the most out of their UFAD systems and maintaining those systems¿ useful lives.
Alternative Air Conditioning Technologies
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Author :
language : en
Publisher:
Release Date : 2004
Alternative Air Conditioning Technologies written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with Air flow categories.
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Author :
language : en
Publisher:
Release Date : 1954
written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1954 with categories.
Performance Of Underfloor Air Distribution In A Fieldsetting
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Author :
language : en
Publisher:
Release Date : 2005
Performance Of Underfloor Air Distribution In A Fieldsetting written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.
Underfloor air distribution (UFAD) is a new method of supplying heated or cooled air throughout a building. Reported advantages of UFAD include energy savings and improved indoor air quality (IAQ). We measured several aspects of the performance of an UFAD system installed in a medium-size office building. The measured air change effectiveness was very close to unity, which is comparable to that measured in buildings with typical overhead air distribution. The pollutant removal efficiency for carbon dioxide was 13% higher than expected in a space with well-mixed air, suggesting a 13% reduction in exposures to occupant generated pollutants. The increase in indoor air temperatures with height above the floor was only 1 to 2 C. This amount of thermal stratification could reduce the sensible energy requirements for cooling of outdoor air by approximately 10%. The occupant's level of satisfaction with thermal conditions was well above average and this high satisfaction rating could possibly be due, in all or part, to the use of a UFAD system. The results of this study provide some evidence of moderate energy and IAQ-related benefits of UFAD. Before general conclusions are drawn, the benefits need to be confirmed in other studies.
Using Ductwork To Improve Supply Plenum Temperature Distribution In Underfloor Air Distribution Ufad System
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Author : Wilmer Pasut
language : it
Publisher:
Release Date : 2011
Using Ductwork To Improve Supply Plenum Temperature Distribution In Underfloor Air Distribution Ufad System written by Wilmer Pasut and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.
Ufad O M Guide
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Author : ASHRAE.
language : en
Publisher:
Release Date :
Ufad O M Guide written by ASHRAE. and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on with TECHNOLOGY & ENGINEERING categories.
"A comprehensive guide on the operations and maintenance of underfloor air distribution systems. Offers practical advice for the builder, technician, and building owner or their representative"--
A Study Of Time Dependent Responses Of A Mechanical Displacement Ventilation Dv System And An Underfloor Air Distribution Ufad System
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Author : Jong Keun Yu
language : en
Publisher:
Release Date : 2010
A Study Of Time Dependent Responses Of A Mechanical Displacement Ventilation Dv System And An Underfloor Air Distribution Ufad System written by Jong Keun Yu and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with categories.
As alternative systems for saving cooling energy compared to conventional overhead (OH) air-conditioning systems, mechanical displacement ventilation (DV) systems and underfloor air distribution (UFAD) systems have been widely adopted for commercial buildings. In these alternative systems, supply air is discharged from low momentum diffusers located at lower positions close to the floor in the DV system, and the supply air of the UFAD system is distributed by an underfloor plenum and discharged from floor diffusers. To predict transient vertical temperature responses when the heat source or the ventilation flow rate vary in time, we introduce transient two-layer stratification models of the DV and UFAD systems, non-dimensionalize them by competing the filling box time (Baines & Turner 1969) and the replenishment time in which all the air in the enclosure is replaced by supply air and validate them by laboratory experiments using a salt-water analogy. In various scenarios of the heat source and the ventilation flow rate, the models show a good agreement with the laboratory experiments. Building energy simulation, which predicts cooling and heating demands of a building, has been used for building design, environment, economics, and occupant comfort. EnergyPlus, which is a building energy simulation tools developed by the U.S. Department of Energy, has integrated capability to predict cooling and heating demands as well as the HVAC (heating, ventilation and air conditioning) energy consumption. To evaluate performance of energy savings of UFAD, we developed prototype office buildings adopting OH and UFAD, and the UCSD-UFAD model was used to estimate realistic cooling and heating demands by simulating the stratified temperature profile in a room. In Californian climates, annual electricity consumption of UFAD is always lower than that of OH by up to 20 %, since UFAD has more opportunities to utilize the economizer ``free cooling" compared to OH. For electricity demand reduction of various Demand Response (DR) activities, increasing room set point temperature is the most effective DR activity and UFAD has higher peak demand reduction compared to OH by approximately 6-10 % when the room set point temperature is higher than 26 Celsius.
