Thermal-driven refrigeration systems have attracted increasing research and development interest in recent years. These systems do not cause ozone depletion and can reduce demand on electricity. The main objective of this work is to perform theoretical analyses of a thermal-driven refrigeration system using a new sorbent-sorptive pair as the working pair. The active component of sorbent is sodium thiocyanate (NaSCN). Ammonia (NH 3) is chosen as sorptive. Based on the thermodynamic properties of the working solution, a mathematical model is introduced to analyze the system characteristics and performance. The results are used to compare with other thermal-driven refrigeration systems. It is shown that the advantages provided by this system over other absorption units include lower generator and evaporator temperatures, a higher coefficient of performance (COP). The COP is about 10 percent higher than the ones for the NH 3-H 2O system working at the same conditions.

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Keywords Absorption, Ammonia-Sodium thiocyanate, Coefficient of performance (COP), Exergy
Journal World Academy of Science, Engineering and Technology
Zhu, L. (Linghui), & Gu, J. (2009). Thermodynamic analysis of a novel thermal driven refrigeration system. World Academy of Science, Engineering and Technology, 56, 351–355.