Abstract
In this study, Organic Rankine cycle (ORC) to recover wasted heat of metallurgy plants was evaluated. Several types of ORC systems, such as the direct evaporation, the indirect evaporation and their combined cycle were picked up and their operational parameters were optimized. The results showed all of these ORC systems indicated better gross power generation efficiency than that of the conventional steam power generation system. It is also indicated that the direct evaporation is most effective and the indirect evaporation is preferable to the combined cycle in case that the direct evaporation system cannot be installed
