>Theoretically, higher temperatures mean more possible efficiency. I think you might be conflating a few things here. For a cycle to produce electricity, that'

>Theoretically, higher temperatures mean more possible efficiency. I think you might be conflating a few things here. For a cycle to produce electricity, that's correct. But the mechanism of absorption chillers is fundamentally different. The chemistry of the materials and their phase change temperatures are definitely a constraining factor. Could you, in theory, develop some other absorbent/refrigerant that works at those higher temperatures? I suppose, but I would suspect there are much easier ways to get efficiency gains.