2019 : Evaluation of electric furnace waste heat recovery using organic rankine cycle: A case study of PT. Vale Indonesia Tbk nickel smelter

Gunawan Nugroho ST, MT., Ph.D

Abstract

Heat conversion technologies need to be developed to take advantage of the necessary increase in the supply renewable energy. Organic Rankine Cycle (ORC) is suited for these applications, mainly because of the ability to recover low-grade heat. Generating electricity by utilizing electric furnace #4 off-gas through Organic Rankine Cycle (ORC) system is the main topic of this paper. Heat and mass balance calculation shows a huge potential of sensible heat out from the furnace off-gas. The ORC heat recovery system appears to be feasible. Furnace off-gas would bypass the existing spray chamber and be routed through thermal heat exchanger. The hot thermal oil will be sent to the ORC system where at the end will generate electrical power. A major advantage of the ORC implementation is that the power generated can be tied into the internal smelter grid and the power generated can be used throughout the …