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An analytical model of the flow across a resistive flow path such as an orifice or pipe was applied to predict the inward leakage in the facepiece of a self-contained breathing apparatus (SCBA) during a steady negative facepiece pressure. The model was
Robert P. Borthwick, James Whetstone, Jiann C. Yang, Antonio Possolo
This paper compared carbon dioxide emissions from plants obtained in two ways, first from the US Department of Energy, Energy Information Administration EIA-767 database and EIA-1605 Greenhouse Gas Reporting Program guidelines and second from the U.S. Envi
The U.S. Centers for Disease Control and Prevention (CDC) has reported that up to half of non-fatal CO poisoning incidents during the hurricane seasons in 2004 and 2005 involved generators operated outdoors but within seven feet of the home. We conducted a
This study provides an analysis of the uncertainty of carbon dioxide (CO2) emissions from an 8 MW natural gas burner. A precise and accurate point source for industrial quantities of carbon dioxide can be used to evaluate the performance of stack gas
This paper identifies five grand challenges in the multidisciplinary field of pedestrian and evacuation dynamics (PED). In order to maximize the ef-fectiveness of limited resources, the PED community would benefit greatly from a prioritized, consensus
A wide range of tools are used to design and analyze the energy implications of different ventilation and space conditioning strategies to reduce building energy use. However, questions exist regarding how and whether these tools consider airflow and
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
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
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
Gregory T. Linteris, Fumiaki Takahashi, Vishwanath R. Katta
Extinguishment of laminar coflow diffusion flames in microgravity (μg) have been studied experimentally and computationally. The μg experiments were conducted using a methane cup-burner flame aboard the NASA Reduced-Gravity Aircraft. Transient computations
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
As the world struggles to reduce energy consumption and greenhouse gas emissions, much attention is focused on making buildings operate more efficiently. However, there is another, less recognized aspect of the built environment: the embodied energy of
A full scale, proof-of-concept experiment was conducted to investigate firebrand production from a burning structure. In this experiment, NIST researchers were invited to set up instrumentation during a structure burn down. As the structure burned
Samuel L. Manzello, Sayaka S. Suzuki, Yoshihiko Hayashi
An experimental campaign was undertaken to determine vulnerabilities of glazing assemblies to firebrand bombardment using the NIST Dragon installed in the Building Research Institutes Fire Research Wind Tunnel Facility (FRWTF). Results of these
Steven J. Emmerich, William S. Dols, Liangzhu (Leon) Wang
Natural and hybrid ventilation are sustainable building ventilation strategies, where airflow is driven naturally by thermal buoyancy and/or wind forces other than pure mechanical means. The simulation and design of these systems thus need to consider
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
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
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
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
When an emergency occurs, it is not always sufficient to simply initiate alarm bells. Individuals may not know what the alarm bell means and, in turn, respond inappropriately to its sound. Many buildings have installed mass notification or emergency
A series of experiments are described in which helium was released at constant rates into a 1.5 m 1.5 m 0.75 m enclosure designed as a -scale model of a two car garage. The purpose was to provide reference data sets for testing and validating computational
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
This report provides the technical basis for a potential new regulatory guide that would provide licensees and applicants with guidance that the staff of the U.S. Nuclear Regulatory Commission (NRC) considers acceptable for use in selecting the design
Nelson P. Bryner, Stephen P. Fuss, Bryan W. Klein, Anthony D. Putorti Jr.
A fire occurred on the evening of June 18, 2007, in the Sofa Super Store in Charleston, SC. NIST analyzed the fire ground, consulted with other experts, and performed computer simulations of fire growth alternatives. Based on these analyses, the following
Nelson P. Bryner, Stephen P. Fuss, Bryan W. Klein, Anthony D. Putorti Jr.
A fire occurred on the evening of June 18, 2007, in the Sofa Super Store in Charleston, SC. NIST analyzed the fire ground, consulted with other experts, and performed computer simulations of fire growth alternatives. Based on these analyses, the following