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Displaying 151 - 175 of 224

Fire Suppression Efficiency Screening Method

December 3, 1997
Author(s)
Jiann C. Yang, Michelle K. Donnelly, William L. Grosshandler
Most of the current methods for fire suppression efficiency screening (e.g., cup burners) are designed for screening agents that can be delivered in the form of vapor. The search for alternatives to halons for fire suppression applications has identified

Evaporation of a Small Water Droplet Containing an Additive

August 1, 1997
Author(s)
M D. King, Jiann C. Yang, W. S. Chien, William L. Grosshandler
An experimental study on the evaporation of a small water droplet containing an additive on a heated, polished stainless-steel surface was performed. Solutions of water containing 30% (w/w) and 60% (w/w) of potassium acetate and sodium iodide were used in

Test Fire Signatures and the Fire-Emulator/Detector-Evaluation (NISTIR 6030)

June 1, 1997
Author(s)
William L. Grosshandler, Thomas G. Cleary
Existing methods for evaluating the performance of smoke and thermal detectors are reviewed. The levels of combustion gases, smoke, temperature and velocity likely to be produced in the European standard detector test fires are discussed, and this

Facility for Calibrating Heat Flu Sensors in a Convective Environment

January 1, 1997
Author(s)
David G. Holmberg, Kenneth D. Steckler, C A. Womeldorf, William L. Grosshandler
The National Institute of Standards and Technology (NIST) presently conducts heat flux sensor calibrations using standard radiation methods. In practice, however, many heat flux sensors are used in test environments where convective heat transfer dominates

Simple Piezoelectric Droplet Generator

January 1, 1997
Author(s)
Jiann C. Yang, W. S. Chien, M D. King, William L. Grosshandler
A design for a piezoelectric on-demand droplet generator is presented. Its simple construction and ease of operation distinguish this generator from other previously reported. The droplet generator has been successfully used to produce droplets of aqueous

Aerosol and SPGG Technology Fire Suppression Screening Methods (NISTIR 5904)

October 28, 1996
Author(s)
William L. Grosshandler, Jiann C. Yang, Thomas G. Cleary
The search for alternatives to halons for fire suppression applications has identified not only new compounds which have physical properties similar to the bromochlorofluorocarbon family, but also inert gaseous agents that are released from a solid state

Heat Flux Calibration Flow and Conduction Facilities: Status Report

October 28, 1996
Author(s)
Kenneth D. Steckler, William L. Grosshandler
Standard methods exist at NIST for calibrating thermal radiation detectors up to 10 kW/m2 using blackbody caviies, and up to 40kW/m2 using a monochromatic laser source. Heat Flux transducers, however, are often used under conditions where convection

Evaporation of a Small Aqueous Suppressing Agent Droplet (NISTIR 5904)

October 1, 1996
Author(s)
W. S. Chien, Jiann C. Yang, M D. King, William L. Grosshandler
Due to its ozone-depleting potential, halon 1301 (CF3Br) has been banned from production under the Montreal Protocol. The research for halon replacement(s) has led to the reconsideration of using water in certain applications. However, under cold storage

Signatures of Smoldering/Pyrolyzing Fires for Multi-Element Detector Evaluation

March 26, 1996
Author(s)
Thomas G. Cleary, William L. Grosshandler, Marc R. Nyden, William J. Rinkinen
Levels of CO, CO2, H2O, hydrocarbons, smoke, temperature and velocity produced in the plumes of smoldering/pyrolyzing wood and smoldering cotton fires are reported, following test protocols described for evaluating automatic fire detection systems. The

Rapid Discharge of a Fire Suppressing Agent

January 1, 1996
Author(s)
Jiann C. Yang, William M. Pitts, B D. Breuel, William L. Grosshandler, W G. Cleveland
This paper describes an experimental method to study the rapid discharge of a fire suppressant (C3F8) from a pressurized vessel. Experimental observations inside and at the exit of the vessel were made using high-speed photography. Boiling was not observed

Optimization of System Discharge (NIST SP 890)

November 1, 1995
Author(s)
Jiann C. Yang, Thomas G. Cleary, I Vazquez, C I. Boyer, M D. King, B D. Breuel, C A. Womeldorf, William L. Grosshandler, Marcia L. Huber, L Weber, G. Gmurczyk
Current aircraft fire suppression bottles for dry bay and engine nacelle applications, which are designed to meet Military Specification MIL-C-22284A (proof pressure of 9.62 MPa and minimum burst pressure of 12.37 MPa), are normally filled with liquid

Solid Propellant Gas Generators: Proceedings of the 1995 Workshop (NISTIR 5766)

November 1, 1995
Author(s)
Jiann C. Yang, William L. Grosshandler
A workshop on solid propellant gas generators was held on June 28-29, 1995 at the National Institute of Standards and Technology under the sponsorship of the Building and Fire Research Laboratory. Gas generator technology was first proposed as alternative
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