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Enhancing Efficiency and Feasibility of Large-Scale Thermal Energy Storage in District Heating

Authors: Abdulrahman Dahash, Fabrizia Giordano, Ahmed Serageldin

Abstract:
This paper explores the role of insulation distribution in the performance and cost-efficiency of large-scale seasonal thermal energy storage (sTES) systems. Through numerical simulations, the study assesses different insulation configurations in underground tank thermal energy storage (TTES) systems, emphasizing their impact on energy efficiency, exergy efficiency, and levelized cost of stored heat (LCOS). The findings reveal that gradient insulation provides optimal performance and cost balance, while fully insulated tanks demonstrate higher LCOS despite their efficiency. This research highlights the importance of strategic insulation planning for the techno-economic feasibility of sTES in district heating systems.

Highlights:

  • Investigates the role of insulation configurations in sTES performance.
  • Demonstrates the impact of gradient insulation on reducing thermal losses and LCOS.
  • Provides a comprehensive techno-economic analysis of TTES systems.
  • Discusses the significance of numerical modeling for efficient energy system planning.
  • Lays groundwork for future studies on environmental and hydrogeological factors affecting sTES.

Keywords: Seasonal Thermal Energy Storage, District Heating, Numerical Modeling, Energy Efficiency, Techno-Economic Analysis

  conference paper     publications