Multi-energy flow analysis of large energy networks motivated by CFD method

Xiaoyu Yang, Xiaoxin Zhou and Ning An

Energy, 2024, vol. 305, issue C

Abstract: The present study focuses on multi-energy flow analysis in large energy networks. In multi-energy flow analysis, we solve different energy networks (electricity, gas, heat) in a sequence manner. The well-known SIMPLE (semi-implicit method for pressure-linked equations) algorithm is extended to solve the steady state of pipe network. Newton linearization has been used to deal with the non-linear terms in pipe network equations. Also, a p-q coupled solver is proposed. The CFD-based approaches use node methods. It is easier to deal with non-pipe elements (e.g., compressors, pumps) in pipe network analysis. Both Newton linearization based SIMPLE and p-q coupled solver are insensitive to the initial guess and can be applied in large-scale network analysis. For dynamic analysis, an implicit box scheme is used to solve the PDEs of gas network. It is stable and fitted to slow and fast boundary changing conditions, and has been applied in the co-simulation of integrated electricity-gas network. Numerical examples of gaslib-134, gaslib-135, gaslib-582, a medium-scale and two large integrated energy networks are used to validate the proposed approaches. The results show good performance compared with previous literatures.

Keywords: Multi-energy flow analysis; Computational fluid dynamics (CFD); SIMPLE algorithm; Newton linearization; p-q coupled solver; Implicit box scheme (search for similar items in EconPapers)
Date: 2024
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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:305:y:2024:i:c:s0360544224018267

DOI: 10.1016/j.energy.2024.132052

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