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This is the final published version of an article published in its final definitive form in 2018. For re-use rights please refer to the publishers terms and conditions.
Domestic heating is the major demand of energy systems, which can bring significant uncertainties to system operation and shrink the security margin. From this aspect, the borehole system, as an interseasonal heating storage, can effectively utilize renewable energy to provide heating to ease the adverse impact from domestic heating. This paper proposes an optimal charging strategy for borehole thermal storage by harvesting energy from photovoltaic (PV) generation in a low-carbon space heating system. The system optimizes the heat injection generated by air source heat pump in the charging seasons to charge the borehole, which provides high inlet temperature for ground source heat pump to meet space heating demand in discharging seasons. The borehole is modeled by partial differential equations, solved by the finite-element method at both 2D and 3D for volume simulation. The pattern search optimization is used to resolve the model. The case study illustrates that with the optimal charging strategies, less heat flux injection can help the borehole to reach a higher temperature so that the heating system is more efficient compared with boilers. This paper can benefit communities with seasonable borehole storage to provide clean but low-cost heating and also maximize PV penetration.
Author(s): Wei W, Gu C, Huo D, Le Blond S, Yan X
Publication type: Article
Publication status: Published
Journal: IEEE Access
Year: 2018
Volume: 6
Pages: 76176-76186
Online publication date: 28/11/2018
Acceptance date: 18/11/2018
Date deposited: 20/06/2019
ISSN (electronic): 2169-3536
URL: https://doi.org/10.1109/ACCESS.2018.2883798
DOI: 10.1109/ACCESS.2018.2883798
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