Technical and Economic Assessment of Supermarket and Power Substation Waste Heat 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 usuall...

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Bibliographic Details
Published in:Energies (Basel) 2022-03, Vol.15 (5), p.1666
Main Authors: Dorotić, Hrvoje, Čuljak, Kristijan, Miškić, Josip, Pukšec, Tomislav, Duić, Neven
Format: Article
Language:English
Subjects:
Boundary conditions
Case studies
Computer centers
Cooling
District heating
Electrical transmission
Electricity substations
heat exchanger
Heat exchangers
heat pumps
Heat recovery systems
Heating
Heating systems
Industrial wastes
Integration
Numerical analysis
Payback periods
pinch analysis
Population density
Refrigeration
Sensitivity analysis
Shopping malls
Spatial distribution
Supermarkets
Temporal distribution
Thermal analysis
Thermal energy
Urban areas
Waste heat
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Summary: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 into the environment. This waste heat could be used to partially cover the 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. In this paper, we have developed an economic assessment model for the integration of urban heat sources into existing district heating systems. By the hourly merit order of waste heat utilization technologies based on pinch analysis, we have defined the most suitable integration of urban heat sources into existing district heating systems. Different temperature regimes of the urban source and the existing heat network have been considered. Finally, the method was tested on the case study of a supermarket and power substation located in Zagreb, while the sensitivity analysis was carried out with a focus on various technical and economic boundary conditions.
ISSN:1996-1073
1996-1073
DOI:10.3390/en15051666