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http://dx.doi.org/10.3795/KSME-B.2003.27.3.398

An Experimental Investigation into the Characteristics of Sampling Module for East-Response Co2 Concentration Analyzer with NDIR  

Kim, Woo-Seok (아주대학교 대학원)
Shon, Deok-Young (아주대학교 대학원 기계공학과)
Park, Young-Moo (아주대학교 기계 및 산업공학부)
Yoo, Jae-Suk (아주대학교 기계 및 산업공학부)
Lee, Jong-Hwa (아주대학교 기계 및 산업공학부)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.27, no.3, 2003 , pp. 398-405 More about this Journal
Abstract
A fast response analyzer for measuring carbon dioxide concentration has been developed for transient characteristic and researches tested on internal combustion engine. The analyzer uses the well known NDIR(Non-Dispersive Infrared) method with miniaturized detection system, giving a time constant of approximately 30 microsecond, and sampling module consists of capillary tube. Since the transit time and the time constant of the sampling system depend on the sampling conditions, it is necessary to investigate the characteristics of sampling system before applied to exhaust gas measurement in engine. A unique method was designed to study the influence of the diameter of transfer sample line and operating conditions of the FRNDIR on transit time and time constant. A database of transit time and time constant was built up for different measured and simulated pressure conditions. The database can be used for correcting eventual $CO_2$ concentration measurement.
Keywords
NDIR; FRNDIR; Capillary; Transit Time; Time Constant;
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  • Reference
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