District heating (DH) networks are increasingly recognized as a key technology for decarbonizing the heating sector in Europe. In Italy, the city of Turin hosts one of the largest and most developed DH systems in the country, mainly based on combined heat and power (CHP) plants using natural gas. However, to meet the European Union’s climate neutrality goals and enhance energy security, the integration of renewable energy sources (RES) and waste heat into district heating systems is becoming essential. This thesis analyses the current operation of the Turin DH network with a specific focus on the behaviour of its thermal energy storage units under different operating conditions.