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Exergy analysis of the industrial symbiosis model in Kalundborg

Abstract:

In this paper, the first exergy analysis of the main energy and material flows interchanged in the ecoindustrial park of Kalundborg is carried out. Being the Asnaes power plant the "heart of the industrial symbiosis", the main flows coming in and out of it are considered. These are the following: waste gas from Statoil refinery used by Asnaes, steam from Asnaes used by Statoil and the pharmaceutical company Novo group, district heating steam from Asnaes used in the municipality of Kalundborg, hot water from Asnaes used for a fishing farm, ashes from Asnaes used by Portland cement and gypsum from the desulphurization process of Asnaes for the gypsum board company Gyproc. The exergy analysis allows a physical and hence rigorous characterization of each of the interchanged flows studied. Furthermore, it constitutes the first step for a later exergy input-output analysis based on Thermoeconomics.