Vodice The Imperial Park Hotel 26 - 28 March 2025
27 th International Conference on Heating, Cooling and Air-conditioning
ABSTRACT
Andre BILOGLAV University of Zagreb Faculty of Mechanical Engineering and Naval Architecture Ulica Ivana Lučića 5 10 000 Zagreb Croatia e-mail: biloglav.andre@gmail.com
He is a student of mechanical engineering at the Faculty of Mechanical Engineering and Naval Architecture of the University of Zagreb (FSB). In addition, since 2023 he has been a demonstrator in the courses Thermal Science 1 and 2 at FSB. He is the recipient of the Rector's Award for the best individual scientific paper in the field of technical sciences for the academic year 2023/2024. Marko RILJIN, univ. bacc. ing. mech. University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Zagreb, Croatia Iva SLATINA, mag. ing. mech. University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Zagreb, Croatia prof. dr. sc. Vladimir SOLDO University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Zagreb, Croatia POTENTIAL OF SEWAGE WATER HEAT PUMPS IN A SUSTAINABLE DISTRICT HEATING SYSTEM
In alignment with European Union directives, the primary goal is to achieve independence from fossil fuels and attain climate neutrality, with a strong emphasis on decarbonizing the energy and building sectors. District heating systems repre- sent an environmentally sustainable and cost-ef- fective solution, making their modernization and decarbonization essential. Wastewater heat re- covery through heat pumps enables sustainable heating while maintaining the quality of delivered heat.
This study evaluates the potential of utilizing sewage water in the city of Zagreb to support a fourth-generation district heating system. The goal is to increase the share of renewable energy sources in the city's overall heat production while reducing carbon dioxide emissions. The study presents a critical analysis of the modeling results, which reveal a significant potential for heat ener- gy generation. The findings suggest that approx- imately 72 000 households could be connected, leading to an annual reduction of around 145 000 tons of CO 2 emissions.
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3rd Thematic Section - ENERGY EFFICIENCY AND RENEWABLES
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