Technical and Economic Assessment of Supermarket and Power Substation Waste Heat Integration into Existing District Heating Systems

Scientific paper - Original scientific paper

• Author: Hrvoje Dorotić
• Author: Kristijan Čuljak
• Author: Josip Miškić
• Author: Tomislav Pukšec
• Author: Neven Duić
• Author's institution: University of Zagreb; Faculty of Mechanical Engineering and Naval Architecture; (Department of Energy, Power and Environmental Engineering); (Power Engineering and Energy Management Chair)
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mechanical Engineering; Process Energy Engineering

Abstract (english)

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.

• Keywords (english): district heating; waste heat; heat pumps; heat exchanger; pinch analysis
• Language: english
• Publication type: Scientific paper - Original scientific paper
• Publication status: Published
• Peer review: Peer review - international
• Publication version: Published version
• Journal title: Energies
• Numbering: vol. 15, 1666
• p-ISSN: 1996-1073
• DOI: https://doi.org/10.3390/en15051666
• URN:NBN: urn:nbn:hr:235:981900
• Publication: 2022
• Type of resource: Text
• Access conditions: Open access
• Created on: 2024-06-04 08:46:15