전기 전도도를 이용한 $H_2$O/LiBr 용액의 실시간 농도의 측정

On-line Measurement of $H_2$O/LiBr Concentration using Electric Conductivity

  • 박찬우 (LG전선(주) 기계연구소) ;
  • 김정환 (경희대학교 기계공학과 대학원) ;
  • 강용태 (경희대학교 기계산업시스템공학부)
  • 발행 : 2002.12.01

초록

The objectives of this paper are to measure the concentration of $H_2$O/LiBr solution by measuring the electrical conductivity and to study the effect of the solution temperature and the concentration on the electrical conductivity of the solution. The solution temperature ranges $20^{\circ},\;40^{\circ},\;and\; 60^{\circ}$ for a fixed concentration during the experiment. The valid ranges of the concentration are two regions, low concentration region (1~20% of LiBr) and high concentration region (55~66% of LiBr). The results show that the conductivity of the solution increases linearly with increasing the solution temperature while it increases without creasing the concentration lower than about 35% of LiBr and decreases with increasing the concentration higher than 35%. This paper proposes experimental correlations for the concentration as functions of the solution temperature and the concentration with error band of $\pm7$% for the low concentration region and $\pm1$% for the high concentration region, respectively. The experimental correlation can be practically used in the on-line measurement without any sampling of solution from the closed system.

키워드

참고문헌

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