engleski

Optimisation of urban waste heat source integration into existing district heating systems

District heating systems are almost always located in densely populated urban areas where various heat sources are available, such as cooling and refrigeration systems in supermarkets, shopping malls and power transformers. These urban sources often have a large share of waste heat which is usually emitted to the environment. Such waste heat could be used to partially cover thermal load in district heating systems. The biggest challenge for their integration is the spatial distribution of urban heat sources in relation to the existing heat network and the temporal distribution of the availability of waste heat energy throughout the year. For this paper, we have developed an optimization model for the integration of urban heat sources into existing district heating systems. By hourly merit order of waste heat utilisation technologies based on pinch analysis, we have defined the most suitable integration of urban heat sources into existing district heating systems. We have considered different temperature regimes of the urban source and the existing heat network. Finally, the method was tested on the case study of Zagreb while the sensitivity analysis was carried out focusing on various technical and economic boundary conditions.

district heating ; energy planning ; waste heat sources ; pinch analysis ; optimisation

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