Taking the Kalina cycle driven by the low temperature flue gas waste heat as the research object

net work (Wnet) and levelized energy cost (LEC) versus outlet temperature of flue gas (Tgo) were analyzed from the perspective of thermo-economics under variations of the pinch point temperature difference of evaporator (ΔTe)

evaporation pressure (pe) and basic ammonia mass fraction (x). Considering the corrosion of low temperature flue gas

the necessity and reasonability of limiting Tgo at its minimum allowed discharge temperature were studied. Results showed that the system existed an optimal outlet temperature of flue gas (Tgo

opt) and evaporation pressure (pe

opt) for LEC

while Tgo

opt was associated with the pinch point temperature difference of evaporator (ΔTe)

pe and x. For Wnet

it only existed pe

opt and Wnet decreased approximately linearly with the increase of Tgo. The economic factors affected directly the optimal operation parameters of the system. The economic factors and low temperature flue gas corrosion problem should be considered comprehensively to choose the appropriate operation parameters in view of different heat source conditions.