Abstract
Abstract A graphical exergy study based on energy-utilization diagrams (EUDs) is performed on the multiple-compartment generator and multiple-compartment absorber in close-to-equilibrium operation in a single stage absorption heat transformer (SAHT). The working fluid considered for the heat transformer is water-lithium bromide. This analysis provides detailed information on internal phenomena such as the driving forces and the distribution of the exergy loss in each subsystem. The results show that the multiple-compartment absorber can improve the temperature lift and exergy efficiency, whereas the multiple-compartment generator can extend the heat source temperature range. The effect of solution concentration is also investigated.
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