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Buildings & Construction

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Displaying 926 - 950 of 3873

IMPACT OF CLASSICAL ASSUMPTIONS IN MODELLING A MICROCHANNEL GAS COOLER

July 5, 2011
Author(s)
Santiago Martinez-Ballester, Jose M. Corberan, Jose Gonzalvez-Macia, Piotr A. Domanski
Most of the current air-to-refrigerant heat exchanger models use the classic ε-NTU approach. These models do not account for 2D longitudinal heat conduction in the tube and the longitudinal heat conduction in the fin. These models, also do not account for

Modelling Dynamic Aerosol Processes for Indoor Ultrafine Particles

June 5, 2011
Author(s)
Dong H. Rim, Lance L. Wallace, Andrew K. Persily, Jung I. Choi
This study has investigated aerosol transformation processes for four common sources of indoor ultrafine particles (UFP): gas stove, electric stove, candle, and hair dryer. For each of the four UFP sources, the temporal change in particle size distribution

Ultrafine Particles: 3 Years of Measurements in the NIST Test House

June 5, 2011
Author(s)
Lance L. Wallace, Andrew K. Persily, Steven J. Emmerich, Dong H. Rim, Chi P. Hoang, Cynthia H. Reed, Wang Fang, M E. Greene, Jung I. Choi
NIST has supported research characterizing ultrafine particle sources and dynamics for more than a decade. Over 90 % of ultrafine particles (UFP) produced by stovetop cooking on both gas and electric stoves were 10 nm. Using the NIST test house

Volatile Organic Compound Concentrations and Estimation of Optimal Source Strengths to Achieve a High Level of Acceptance Indoors using Multi- Zone Simulation

June 5, 2011
Author(s)
Helena Jarnstrom, William Stuart Dols, Cynthia H. Reed, Andrew K. Persily
This study investigated the possibility of identifying chemical pollutant profiles and concentration levels that result in a high level of acceptance indoors. In addition, a multi-zone simulation tool, CONTAM, developed by the National Institute of

Mathematical Modeling of Wildland-Urban Interface Fires

June 1, 2011
Author(s)
Randall J. McDermott, Ronald Rehm
This paper presents a simple model to demonstrate the effect on grass-fire propagation of the winds induced by structural fires in a Wildland-Urban Interface (WUI) setting. The model combines an empirical formula for wind-driven grass-fire spread and a

Characterization of the Range Performance of a 3D Imaging System (NIST TN 1695)

May 9, 2011
Author(s)
Geraldine S. Cheok, Kamel S. Saidi, Marek Franaszek, James J. Filliben, Nicholas Scott
A 3D imaging instrument is a non-contact measurement instrument used to rapidly obtain 3D information about a scene or object. The use of and the applications for these instruments have grown tremendously in the last decade. The expanded use of 3D imaging

PROCEEDINGS OF THE NATIONAL FIRE SERVICE DATA SUMMIT

May 9, 2011
Author(s)
Jason D. Averill, Lori Moore-Merrell, Kathy Notarianni, Robert Santos, Doug Wissoker
Effectively managing a fire department requires an understanding of and an ability to demonstrate how changes to resources will affect community outcomes. It is imperative that fire department leaders, as well as political decision makers, know how fire

Assessing the shelf-life of a prototype reference material for product emissions testing

May 2, 2011
Author(s)
Cynthia H. Reed, Daniel V. Samarov, Dennis D. Leber, Zhe Liu, John Little
The National Institute of Standards and Technology (NIST) and Virginia Tech (VT) are developing a volatile organic compound (VOC) reference material to validate product emissions chamber testing. To verify the storage method of the material and determine

Inter-laboratory study approach to validate the performance of a prototype reference material for product emissions testing

May 2, 2011
Author(s)
Cynthia H. Reed, Andrew K. Persily, Zhe Liu, Steve Cox, John Little, Wolfgang Horn, Olaf Wilke, Katharina Wiegner
Product emissions chamber testing involves a complex protocol with several sources of measurement uncertainty (ASTM, 2010; ISO, 2006). Despite the potential for significant variability in measurement results within and among laboratories, there is no

Rheological Characterization of Flow Table Reference Material

April 29, 2011
Author(s)
Chiara F. Ferraris, Haleh Azari
The flow table is a standardized test that is widely used to qualify a mortar to be tested for compressive strength and air content. It is also the only standard test to quantify a mortar workability property. Therefore, the calibration of this device is

LABORATORY ACCELERATED AND NATURAL WEATHERING OF STYRENE-ETHYLENE-BUTADIENE-STYRENE (SEBS) BLOCK COPOLYMER: ACCELERATION AND CORRELATION

March 23, 2011
Author(s)
Kar T. Tan, Christopher C. White, David J. Benatti, Deborah S. Jacobs, Donald L. Hunston
Indoor accelerated and outdoor field weathering of styrene-ethylene-butadiene-styrene block copolymer have been studied by Fourier transform infrared (FTIR) spectroscopy. In the indoor accelerated experiments, specimens are exposed to ultraviolet-visible

Consumer Use of Dishwashers, Clothes Washers, and Dryers: Data Needs and Availability

March 21, 2011
Author(s)
Christopher Iglehart, Natascha S. Milesi-Ferretti, Michael Galler
NIST provides technical support to the DOE in developing test procedures for a variety of residential appliances. As part of this process, DOE seeks representative consumer use data to establish test procedures that are representative of real world use
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