Holistic method for determining the techno-economic feasibility of waste heat for the planning of the low-temperature district heating systems

Josip Miškić, Hrvoje Dorotić, Tomislav Pukšec, Daniel Rolph Schneider and Neven Duić

Energy, 2024, vol. 313, issue C

Abstract: The heating sector is the most energy-intensive sectors, accounting for almost 50 % of final energy consumption at the EU and almost 70 % of that energy comes from fossil fuels. Urban waste heat sources, the refrigeration system of supermarkets, cooling systems of supermarkets, shopping malls, data centres, and power substations are known as systems that can be heat sources for the district heating (DH) system. This paper presents a holistic method to assess the economic, energy, and environmental benefits of integrating urban waste heat sources into DH. The method considers different boundary conditions and compares these systems to individual natural gas boilers, as well as to DH based on natural gas boilers. The observed boundary conditions include varying temperature regimes of the DH network, heat demands, different shares of space heating, and plot ratios. The method has been implemented and tested in the case of Zagreb. The results showed that Low-Temperature DH is viable for lower plot ratio and high heat demand, while Neutral-temperature DH are suitable for high plot ratio and high heat demand. Ultra Low-Temperature DH is viable for medium plot ratio and medium heat demand. The conventional solutions remain viable for low plot ratio and low heat demand.

Keywords: District heating; Urban waste heat sources; Waste heat potential; Techno-economic feasibility; District heating planning (search for similar items in EconPapers)
Date: 2024
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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:313:y:2024:i:c:s0360544224037460

DOI: 10.1016/j.energy.2024.133968

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