Modelling of mine shaft thermal energy storage (MSTES) for district heating and grid balancing

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Ewe, Win Eng and Flett, Graeme and Tuohy, Paul and Dassow, Jessica and Molnar, Ian and Flude, Stephanie and Mukherjee, Indrani and Burnside, Neil and Wang, Huachuan and Yang, Shangtong and Whittington, Daniel and Shipton, Zoe; (2024) Modelling of mine shaft thermal energy storage (MSTES) for district heating and grid balancing. In: Proceedings of uSim Conference 2024. International Building Performance Simulation Association, GBR. (In Press)

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Abstract

This paper investigates the potential for water filled mineshafts or similar storage structures to provide flexibility and improve financial performance. A technoeconomic model and case study are described and Heat Pump (HP) and CHP based DH systems evaluated. Future electricity tariffs with import and export pricing based on wind generation surplus and shortfall periods, and costs for CHP fuels (e.g. hydrogen) are considered. Temperatures in MSTES and surrounding geology are modelled. MSTES integration was found to have levelised cost of heat (LCOH) advantages. With MSTES both HP and CHP based DH systems can offer up to 100% flexibility for grid balancing.

ORCID iDs

Ewe, Win Eng ORCID logoORCID: https://orcid.org/0000-0002-0416-0963, Flett, Graeme ORCID logoORCID: https://orcid.org/0000-0002-8255-5223, Tuohy, Paul ORCID logoORCID: https://orcid.org/0000-0003-4850-733X, Dassow, Jessica, Molnar, Ian, Flude, Stephanie ORCID logoORCID: https://orcid.org/0000-0002-0511-0116, Mukherjee, Indrani ORCID logoORCID: https://orcid.org/0000-0001-5817-4204, Burnside, Neil ORCID logoORCID: https://orcid.org/0000-0002-4110-2623, Wang, Huachuan, Yang, Shangtong ORCID logoORCID: https://orcid.org/0000-0001-9977-5954, Whittington, Daniel and Shipton, Zoe ORCID logoORCID: https://orcid.org/0000-0002-2268-7750;
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