RT Journal Article T1 RELaTED Project: New Developments on Ultra-Low Temperature District Heating Networks A1 Marijuan, Antonio Garrido A1 Garay, Roberto A1 Lumbreras, Mikel A1 Sánchez, Víctor A1 Macias, Olga A1 Rozas, Juan Perez Sainz De AB District heating networks deliver around 13% of the heating energy in the EU, being considered as a key element of the progressive decarbonization of Europe. The H2020 REnewable Low TEmperature District project (RELaTED) seeks to contribute to the energy decarbonization of these infrastructures through the development and demonstration of the following concepts: reduction in network temperature down to 50 °C, integration of renewable energies and waste heat sources with a novel substation concept, and improvement on building-integrated solar thermal systems. The coupling of renewable thermal sources with ultra-low temperature district heating (DH) allows for a bidirectional energy flow, using the DH as both thermal storage in periods of production surplus and a back-up heating source during consumption peaks. The ultra-low temperature enables the integration of a wide range of energy sources such as waste heat from industry. Furthermore, RELaTED also develops concepts concerning district heating-connected reversible heat pump systems that allow to reach adequate thermal levels for domestic hot water as well as the use of the network for district cooling with high performance. These developments will be demonstrated in four locations: Estonia, Serbia, Denmark, and Spain. PB Multidisciplinary Digital Publishing Institute (MDPI) YR 2020 FD 2020-12-25 LK http://hdl.handle.net/11556/1072 UL http://hdl.handle.net/11556/1072 LA eng NO Marijuan, Antonio Garrido, Roberto Garay, Mikel Lumbreras, Víctor Sánchez, Olga Macias, and Juan Perez Sainz De Rozas. “RELaTED Project: New Developments on Ultra-Low Temperature District Heating Networks.” Proceedings 65, no. 1 (December 25, 2020): 25. doi:10.3390/proceedings2020065008. NO This project has received funding from the European Union’s Horizon 2020 research and innovationprogram under grant agreement No 768567. This publication reflects only the authors’ views and neither theAgency nor the Commission are responsible for any use that may be made of the information contained therein. DS TECNALIA Publications RD 1 jul 2024