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原文传递 Screening Tests for Alternative Suppressants for In-Flight Aircraft Fires.

题名：	Screening Tests for Alternative Suppressants for In-Flight Aircraft Fires.
作者：	gann, r. g.
关键词：	chemical properties, chemical agents, combustion chemistry, thermodynamic properties, reaction kinetics, fire research
摘要：	A primary component of the Next Generation Fire Suppression Technology Program (NGP) was the examination of the world of chemistry, seeking to identify chemicals that merited examination under practical fire suppression conditions or to enable a finding that no previously unidentified such chemicals existed. Performing this survey required a protocol for rapid and inexpensive screening of literally thousands of chemicals to identify those relatively few agents worthy of further examination as alternative fire suppressants. There are multiple, critical chemical properties whose beneficial values promoted the widespread use of halon 1301 (CF3Br) and which would affect consideration of alternative fire suppressants. These are fire suppression efficiency, quenching of flame re-ignition, ozone depletion potential (ODP), global warming potential (GWP), atmospheric lifetime, suppressant residue, electrical conductivity, corrosivity to metals, compatibility with polymeric materials, stability under long-term storage, toxicity of the chemical and its combustion and decomposition products, and speed of dispersion. Estimation of these values needed to be obtained using minimal mass of the chemicals for cost and toxicity reasons. A testing hierarchy was needed to ensure that the most unique chemicals and the properties that were deemed most important and used the least chemical were determined first. Figures of merit for each property and a testing/estimating sequence and target values were also needed. The NGP built on prior methods used to screen chemicals1, an NGP-organized workshop on agent compatibility with people, materials and the environment, and other formal and informal procedures. / Availability Note: Order this product from NTIS by: phone at 1-800-553-NTIS (U.S. customers); (703)605-6000 (other countries); fax at (703)605-6900; and email at orders@ntis.gov. NTIS is located at 5285 Port Royal Road, Springfield, VA, 22161, USA.
总页数：	u0709；16p
报告类型：	科技报告