TY - THES A1 - Hussain, Waleed T1 - Modelica-based simulation for the optimization of a district heating system with variable temperatures N2 - This thesis presents an insight into the possibility of implementing the intelligent sector coupling between the heat and electricity supply grids by using the combination of a solar PV system, decentralized heat pumps and decentralized thermal energy storage in an existing district heating system with variable temperatures in Germany. The district heating system was optimized for the summer period utilizing the existing system’s Modelica language model in Dymola software. In order to implement the intelligent sector coupling between heat and generated renewable energy-based electricity a separate control theory was developed so that the generated electricity can be utilized in an efficient way to operate the decentralized heat pumps. Moreover, the role of decentralized thermal energy storage was also considered for the appropriate sizing of solar PV system so as to utilize the maximum amount of renewable energy-based electricity to produce heat during the summer period. The assessment of the energy production and utilization from different systems was carried out by performing the electrical and heat energy analysis of the simulation results. The findings of the thesis exhibited an appropriately sized solar PV system which fulfilled up to the 80 % of total electricity consumption for heat production during the summer period by implementing an intelligent sector coupling between the heat and electricity supply grids. Y1 - 2021 UR - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:573-8104 CY - Ingolstadt ER -