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Displaying 3326 - 3350 of 3908

Visibility of Exit Signs in Clear and Smoky Conditions

December 1, 1992
Author(s)
Belinda L. Collins, M S. Dahir, Daniel M. Madrzykowski
In the present study, the visibility of several types of internally lit exit signs was assessed under both clear and smoky conditions. In the evaluation both photometric and psychophysical measures were taken.

Toxicity Data for Fire Hazard Analysis

October 27, 1992
Author(s)
Richard G. Gann, Vyto Babrauskas, E Braun, Barbara C. Levin, M Paabo, Richard H. Harris Jr., Richard D. Peacock, S Yusa
A comprehansive methodology has been developed for obtaining and using smoke toxicity data for fire hazard analysis. The methodology comprises: determination that the post-flashover fire is the propert focus of smoke inhalation deaths; criteria for a

Causes of the Apparent Heat Transfer Degradation for Refrigerant Mixtures

August 9, 1992
Author(s)
Mark A. Kedzierski, J. H. Kim, David Didion
This paper presents an investigation into the causes of the apparent heat transfer degradation associated with horizontal-annular flow evaporation of refrigerant mixtures. The apparent heat transfer degradation is the difference between the measured heat

Note on the Pressure Equations Used in Zone Fire Modeling (NISTIR 4906)

August 1, 1992
Author(s)
Ronald G. Rehm, Glenn P. Forney
Examples of simple zone fire models are analyzed. These models illustrate the nature of the numerical problems commonly encountered in zone models of enclosure fires. Often these difficulties arise in the solution of the equations for the pressure in

Implicitly Coupling Heat Conduction Into a Zone Fire Model (NISTIR 4886)

July 1, 1992
Author(s)
W F. Moss, Glenn P. Forney
This report examines several methods for coupling the partial differential equations that arise in conductive heat transfer with the ordinary differential equations that arise in zone fire modeling. Two existing algorithms (method of lines and time

Modeling Smoke Movement Through Compartmented Structures (NISTIR 4872)

July 1, 1992
Author(s)
Walter W. Jones, Glenn P. Forney
This paper describes a model of fire growth and smoke transport for compartmented structures, with emphasis on those aspects which are important to making correct predicitons of smoke movement in multicompartment structures. In particular, we are

Measurement of Toxic Potency for Fire Hazard Analysis

May 18, 1992
Author(s)
Vyto Babrauskas, Barbara C. Levin, Richard Gann, M Paabo, Richard H. Harris Jr., Richard Peacock, S Yusa
This study is the principle product of a research program to provide a technically sound methodology for obtaining and using smoke toxicity data for hazard analysis. It establishes: (a) an improved bench-scale toxic potency measurement, one which

Staging Areas for Persons With Mobility Limitations

February 1, 1992
Author(s)
J H. Klote, Harold E. Nelson, Scott Deal, Bernard M. Levin
The National Institute of Standards and Technology (NIST) is engaged in a project funded by the General Services Administration (GSA) to evaluate the concept of staging area as a means of fire protection for persons with disabilites as it applies to

Ultrafine Combustion Aerosol Generator

January 1, 1992
Author(s)
Thomas G. Cleary, George W. Mulholland, Lewis K. Ives, Robert A. Fletcher, J. W. Gentry
We are able to produce a narrowly distributed combustion aerosol with a mean particle size of about 10 nm by operating a laminar diffusion burner with acetylene fuel in the nominal "presooting" condition. Number concentrations of approximately 106

Computing Radiative Heat Transfer Occurring in a Zone Fire Model

November 1, 1991
Author(s)
Glenn P. Forney
Radiation, convection and conduction are the three mechanisms which a zone fire model must consider when calculating the heat transfer between fires, wall surfaces and room gases. Radiation dominates the other two modes of heat transfer in rooms where
Displaying 3326 - 3350 of 3908
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