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Session: Poster session and Ouzo tasting in room Kallirhoe
Session starts: Monday 09 September, 17:20

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Miguel Ramirez Stefanoua (aTECNALIA Research & Innovation)
Mercedes Gómez de Artechea (TECNALIA Research & Innovation)
Andrea Panizza (ORI MARTIN SPa)

Abstract:
Global warming is a clear threat to the life in our planet and European policies define a long-term strategy to reduce greenhouse gas emissions [1]. Industries, as large energy consumers, play a key role on this transition in which industrial waste heat recovery is a critical point to reduce fossil fuel consumption and therefore CO2 emissions. This work presents the experimental results of the annual performance of a 1,8MWe ORC system integrated in a steel mill. The waste heat recovered from the fumes of an Electric Arc Furnace (EAF) at ORI Martin is used to generate steam to deliver heat to a district heating (DH) grid during heating season and the rest of the year to run an ORC (Turboden). The results of one year of monitoring showed that a total of 45910 MWh of heat was recovered in a period of 4952 hours of plant operation. From the total heat generated 46% was delivered to the DH grid and 33% to the ORC, considering heat losses. The ORC overall efficiency resulted in 17,4% and generated 2631 MWh of electricity which corresponds to approximately 6% of the total energy recovered. The hypothetical case of full ORC operation during a year was simulated and considering the plant´s losses the total electricity generated could reach approximately 7000MWh. This could result in annual carbon savings estimated on 2457 t CO2 based on a carbon footprint for Brescia of 0.353kg CO2 eq. per kWh. [2] [1] European Commission (2018). Our vision for a clean planet for all. [2] Electricitymap. 2019. Climate impact by area. [ONLINE] Available at: https://www.electricitymap.org. [Accessed 25 July 2019].