Aqueous solutions containing high concentrations of lithium bromide (LiBr) are widely used as absorbent solutions in almost all types of absorption heating and refrigeration systems that use natural gas or steam as energy sources (1,2). Hydrogen generation, associated with the corrosion problems in these systems, causes significant efficiency losses due to the presence of non-condensable gases since these machines work under vacuum conditions. Studies on the effect of non-condensable gases on the performance of absorbers (3,4) have reported that the evolution of hydrogen in the LiBr/water absorber reduces the absorption system's overall coefficient of performance (COP).
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