Abstract
The organic Rankine cycle low temperature waste heat power generation technology can be applied in water quenching blast furnace slag. To select a suitable fluid and improve the effectiveness of the process, 10 different working fluids were selected based on their characteristics (refrigerant, alkyl hydrogen, siloxane, etc.) and their application range in the co-generation project. Each co-generation system using the selected fluids was calculated by Matlab simulation programming. The results show that, in the case of constant evaporation and condensation temperatures, the thermal efficiency of the system increases, but the pressure decreases, with the rise in fluid critical temperature. Based on the comprehensive analysis of thermal efficiency, irreversible loss, unit mass flow power generation capacity, pressure level and environmental effect of the system, fluid R245fa, which is a hydrocarbon fluorine group type, is the best choice from the fluids tested.
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