| Title |
On-line Measurement of H2O/LiBr Concentration using Electric Conductivity |
| Keywords |
Electric conductivity ; 전기 전도도 ; Concentration ; 농도 ; H2O/LiBr ; 물/리튬브로마이드 ; Refrigerant contamination ; 냉매오염 |
| Abstract |
The objectives of this paper are to measure the concentration of H2O/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℃, 40℃ and 60℃ 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 with increasing 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 bands of ±7% for the low concentration region and ±1% 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. |