Dejan Mitrović, Bratislav Blagojević, Marko Ignjatović, Branislav Stojanović, Jelena Janevski

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Improving energy efficiency of district heating systems as a whole is closely related to the application of computer technologies for visualization and control of heat production and distribution. Control in district heating enables fast adjustability of all sub-systems to variations in heat demand. At the same time it enables solving optimal control problems in transition periods like system start and system stop. A district heating system supplies heat to different end-users which can differ in both the quantity of supplied heat and the character of their heat demand. Heat demand of end-users varies with change in outside conditions (outside dry bulb temperature, solar radiation, wind speed and direction etc.), so it is crucial to be able to adjust heat carrier parameters in order to meet the heat demand. This can be achieved only with proper control. In addition, the quality of heat supply can be improved and heat losses reduced, which leads to the reduction in primary energy consumption, the improvement of energy efficiency of the system and, finally, the reduction in green house gasses (GHG) emissions. It is considered that the largest potential of reducing GHG emissions lies in increasing energy efficiency, especially in the district heating sector. Special attention is paid to CO2 emission, since this gas is substantially emitted through anthropogenic activities.

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