동력기계공학회지 (Journal of Power System Engineering)

  • 제15권2호
  • /
  • Pages.55-60
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  • 2011
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  • 2713-8429(pISSN)
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  • 2713-8437(eISSN)
한국동력기계공학회 (The Korean Society for Power System Engineering)
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전기전도도법을 이용한 우레아 농도 센서 개발

Development of an Urea Sensor using Electric Conductivity Method

  • 최병철 (전남대학교 기계시스템공학부) ;
  • 김계연 (전남대학교 기계공학과) ;
  • 양주영 (전남대학교 기계공학과) ;
  • 김화남 (전남대학교 BK21지능형기계시스템사업단)
  • 투고 : 2010.09.30
  • 심사 : 2011.02.26
  • 발행 : 2011.04.30
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초록

The popularity of diesel engines is derived primarily from their higher thermal efficiency resulting from higher compression ratio. NOx removal from the diesel emissions is very important to meet stringent emission regulations. NOx emission from diesel engines is removed by an urea-SCR or an LNT system. The urea-SCR system needs the urea-solution supply system with concentration and level sensor. This study was carried out to develop a sensor for the measurement of urea-solution concentration by an electric conductivity method. Considering experimental parameters were the material of electrode, two kinds of electric power(AC or DC), the distance between two electrodes, and the length of electrode. It was found that the AC electric power was more useful to measure the urea-solution concentration compared to DC, because it prevented an ionization of the urea-solution. The silver rod coated with Pt is the most useful electrode, tendency of which is similar to Pt rod, and the cost is more economic. We could also find out the optimum distance between two electrodes and the length of electrode was 10mm and 3mm, respectively.

키워드

참고문헌

  1. HeIden, R. V., Gendereren, M. V., 2002, "Engine Dynamometer and Vehicle Performance of a Urea SCR System for Heavy Duty Truck Engines", SAE, 2002-01-0286.
  2. Hoard, J., 2001, "Plasma-Catalysis for Diesel Exhaust Treatment : Current State of the Art", SAE 2001-01-0185.
  3. Johnson, T. V., 2006, "Diesel Emission Control in Review", SAE 2006-01-0030.
  4. Wei, L. F., Shih, J. S., 2001, "Fullerene-cryptand coated piezoelectric crystal urea sensor based on urease", Analytica Chimica Acta, Vol. 437, pp. 77-85. https://doi.org/10.1016/S0003-2670(01)00941-2
  5. Ansari, S. G., Ansari, Z. A., Seo, H. K., Kim, G. -S., Kim, Y. -S., Khang, G., Shn, H. -S., 2008, "Urea sensor based on tin oxide thin films prepared by modified plasma enhanced CVD", Sensors and Actuators B: Chemical, Vol. 132, pp. 265-271. https://doi.org/10.1016/j.snb.2008.01.036
  6. 최병철, 김화남, 서충길, 김계연, 양주영, "디젤자동차용 SCR 시스템의 환원제 농도 측정장치", 대한민국 특허출원번호 10-2010-0028700.

피인용 문헌

  1. 비분산 적외선 이산화탄소 가스센서 특성의 온·습도 영향 vol.26, pp.3, 2017, https://doi.org/10.5369/jsst.2017.26.3.179