| Summary: | When compared with LiBr/H<sub>2</sub>O, an absorption refrigeration cycle using CaCl<sub>2</sub>/H<sub>2</sub>O as the working pair needs a lower driving heat source temperature, that is, CaCl<sub>2</sub>/H<sub>2</sub>O has a better refrigeration characteristic. However, the crystallization temperature of CaCl<sub>2</sub>/H<sub>2</sub>O solution is too high and its absorption ability is not high enough to achieve an evaporation temperature of 5 °C or lower. CaCl<sub>2</sub>-LiNO<sub>3</sub>-KNO<sub>3</sub>(15.5:5:1)/H<sub>2</sub>O was proposed and its crystallization temperature, saturated vapor pressure, density, viscosity, specific heat capacity, specific entropy, and specific enthalpy were measured to retain the refrigeration characteristic of CaCl<sub>2</sub>/H<sub>2</sub>O and solve its problems. Under the same conditions, the generation temperature for an absorption refrigeration cycle with CaCl<sub>2</sub>-LiNO<sub>3</sub>-KNO<sub>3</sub>(15.5:5:1)/H<sub>2</sub>O was 7.0 °C lower than that with LiBr/H<sub>2</sub>O. Moreover, the cycle’s COP and exergy efficiency with CaCl<sub>2</sub>-LiNO<sub>3</sub>-KNO<sub>3</sub>(15.5:5:1)/H<sub>2</sub>O were approximately 0.04 and 0.06 higher than those with LiBr/H<sub>2</sub>O, respectively. The corrosion rates of carbon steel and copper for the proposed working pair were 14.31 μm∙y<sup>−1</sup> and 2.04 μm∙y<sup>−1</sup> at 80 °C and pH 9.7, respectively, which were low enough for engineering applications.
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