Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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An Experimental Investigation into the Characteristics of Sampling Module for East-Response Co2 Concentration Analyzer with NDIR

비분산 적외선 분광법을 이용한 Co2농도 고속 분석기의 Sampling Module 특성에 관한 실험적 연구

  • 김우석 (아주대학교 대학원) ;
  • 손덕영 (아주대학교 대학원 기계공학과) ;
  • 박영무 (아주대학교 기계 및 산업공학부) ;
  • 유재석 (아주대학교 기계 및 산업공학부) ;
  • 이종화 (아주대학교 기계 및 산업공학부)
  • Published : 2003.03.01
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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.

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References

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