Korean Journal of Air-Conditioning and Refrigeration Engineering (설비공학논문집)

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
권호 표지

A Preliminary Study on the In-line Concentration Measurement of Absorbent Solution

흡수용액의 In-line 농도측정을 위한 기초연구

  • 민병혁 (서강대학교 기계공학과 대학원) ;
  • 황덕용 (서강대학교 기계공학과 대학원) ;
  • 정시영 (서강대학교 기계공학과) ;
  • 구기갑 (서강대학교 화학공학과)
  • Published : 2003.02.01
Download PDF
⟨ Previous Next ⟩

Abstract

Titration method is one of the widely used methods for the concentration measurement of absorbent ammonia/water. However, this method is inconvenient because the solution should be extracted for the measurement. Moreover, significant error can be introduced by the evaporation of ammonia during the sampling and measuring procedure. In this study a reliable in-line concentration measurement method was proposed. To prove the validity of the concept, a measuring apparatus was designed, built, and tested with water. It is found that the location of flow inlet and exit is important in the measurement accuracy. The flow inlet and exit located in the middle of the test cell showed the best result. By the error analysis, it is expected that the ammonia concentration can be measured within the error of $\pm$0.18% assuming the error of 0.1 K in temperature measurement and 0.1 g in weight measurement.

Keywords

References

  1. J. Chem. Eng. Data v.32 no.2 Vapor-Liquid Equilibria in the Ammonia-Water System Rizvi, S. S. H.;Heldemann, R. A.
  2. IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control v.47 Ultrasonic density sensor for liquids Puttmer, A.;Hauptmann, P.;Henning, B.
  3. Ultrasonics v.37 On-line ultrasonic density sensor for process control of liquids and slurries Greenwood, M. S.;Skorpik, J. R.;Bamberger, J. A.;Harris, R. V.
  4. Review of scientific instruments v.71 no.10 Real-time precision concentration measurement for flowing liquid solutions Krishna, V.;Fan, C. H.;Longtin, J. P.
  5. Korean Journal of Air-conditioning and Refrigeration Engineering v.11 no.3 A study on prediction of oil concentration in the R-407C and R-410A refrigeration system Lee, J. M.;Kim, C. H.;Park, Y. M.
  6. Bulletin of the Electrotechnical Laboratory v.58 no.10 Trial Test of Ammoniawater Concentration Meter Kashihara, T.
  7. Proc. of the Int. Sorption Heat Pump Conf. Thermodynamic data in a falling film absorber oprerating on ammonia/water solutions Romero, R. J.;Best, R.;Hernandez, J.;Ramirez, O.;Aguillon, J.