Record Display for the EPA National Library Catalog
RECORD NUMBER: 4 OF 6| Main Title | Constant Volume Sampling System Water Condensation. SAE Technical Paper Series. | |||||||||||
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| Author | Black, F. ; Snow, R. ; | |||||||||||
| CORP Author | Environmental Protection Agency, Research Triangle Park, NC. Mobile Source Emissions Research Branch. ;ManTech Environmental Technology, Inc., Research Triangle Park, NC. | |||||||||||
| Publisher | c1994 | |||||||||||
| Year Published | 1994 | |||||||||||
| Report Number | EPA/600/A-94/145; | |||||||||||
| Stock Number | PB94-197423 | |||||||||||
| Additional Subjects | Alternative fuels ; Vapor condensation ; Exhaust emissions ; Automobile exhaust ; Combustion products ; Flow rate ; Air pollution control ; Exhaust gases ; Motor vehicle engines ; Fuel economy ; Test stands ; Water ; Humidity ; Dyanmometers ; Ethanols ; Reprints ; CVS(Constant Volume Sampling) ; FTP(Federal Test Procedure) ; CNG(Compressed Natural Gas) | |||||||||||
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| Collation | 13p | |||||||||||
| Abstract | Combustion of organic motor vehicle fuels produces carbon dioxide and water (H20) vapor (and also products of incomplete combustion, e.g. hydrocarbons and carbon monoxide, at lower concentrations). The Constant Volume Sampling (CVS) system, commonly used to condition auto exhaust for sampling and analysis, provides for controlled ambient air dilution of the engine exhaust. Water condensation can be a problem during CVS system sample conditioning, depending upon vehicle fuel composition and fuel economy, and diluent air humidity and exhaust/diluent ratio. The paper describes a 'spreadshest' procedure for detailed, second by second, determination of diluted exhaust dew point and the necessary CVS system flow rates to avoid H20 vapor condensation. (Copyright (c) 1994 Society of Automotive Engineers.) |