In an effort to obtain high efficiency in gas fired absorption chillers, a new working fluid has been developed with the addition of the component of LiNO3, LiCl and LiI to the conventional solution of LiBr-H2O. The solubility and vapor pressure of the 4 component working fluid developed in this work were measured and compared to the results of LiBr-H2O solution. It was observed that there exists an optimal mole ratio of the inorganic salts in terms of solubility. The mole ratio of LiBr, LiNO3and LiCl was found to be around 5:1:1∼2 in the LiBr-LiNO3-LiCl-H2O mixture, and in the case of LiBr-LiNO3-LiI-H2O and LiBr-LiI-LiCl-H2O mixtures, the mole ratio of LiBr, LiNO3and LiI/LiBr, LiI and LiCl were found to be around 5:1:1 and 5:1:0.5∼1 respectively. The vapor pressure of the 4 component working fluid of the optimal mole ratio was increased with adding the component of LiNO3, LiCl and LiI except for LiBr-LiNO3-LiCl-H2O mixture. The absorption capacity of LiBr-LiNO3-LiCl-H2O mixture was obtained higher than that of LiBr-H2O mixture.

고효율 가스흡수식 냉방기를 위한 신 작동매체로 기존의 LiBr-H2O 용액에 LiNO3, LiCl, LiI 성분을 첨가하여 4성분 용액을 제조하였다. 본 연구를 통하여 제조된 4성분계의 작동매체에 대한 용해도와 증기압을 측정하여 기존의 LiBr-H2O 계와 비교 분석하였으며, 이들에 대한 최적혼합 몰비를 각각 구하였다. 용해도 측면에서 LiBr-LiNO3-LiCl계는 5:1:1∼2, LiBr-LiNO3-LiI계는 5:1:1, LiBr-LiI-LiCl계의 경우 5:1:0.5∼1로 나타났다. 한편 LiBr-LiNO3-LiCl-H2O계를 제외하고 모두 증기압이 LiBr-H2O계에 비해 높게 나타났다. LiBr-LiNO3-LiCl-H2O 계를 이용한 흡수성능 실험시 LiBr-H2O계 보다 우수한 특성을 지녔다