Performant and Simple Numerical Modeling of District Heating Pipes with Heat Accumulation

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dc.contributor.authorKudela, Liborcs
dc.contributor.authorChýlek, Radomírcs
dc.contributor.authorPospíšil, Jiřícs
dc.coverage.issue4cs
dc.coverage.volume12cs
dc.date.issued2019-02-16cs
dc.description.abstractThis paper compares approaches for accurate numerical modeling of transients in the pipe element of district heating systems. The distribution grid itself affects the heat flow dynamics of a district heating network, which subsequently governs the heat delays and entire efficiency of the distribution. For an efficient control of the network, a control system must be able to predict how “temperature waves” move through the network. This prediction must be sufficiently accurate for real-time computations of operational parameters. Future control systems may also benefit from the accumulation capabilities of pipes. In this article, the key physical phenomena affecting the transients in pipes were identified, and an efficient numerical model of aboveground district heating pipe with heat accumulation was developed. The model used analytical methods for the evaluation of source terms. Physics of heat transfer in the pipe shells was captured by one-dimensional finite element method that is based on the steady-state solution. Simple advection scheme was used for discretization of the fluid region. Method of lines and time integration was used for marching. The complexity of simulated physical phenomena was highly flexible and allowed to trade accuracy for computational time. In comparison with the very finely discretized model, highly comparable transients were obtained even for the thick accumulation wall.en
dc.formattextcs
dc.format.extent1-23cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationENERGIES. 2019, vol. 12, issue 4, p. 1-23.en
dc.identifier.doi10.3390/en12040633cs
dc.identifier.issn1996-1073cs
dc.identifier.orcid0000-0001-8596-8755cs
dc.identifier.orcid0000-0002-4599-2440cs
dc.identifier.orcid0000-0002-2437-538Xcs
dc.identifier.other155925cs
dc.identifier.researcheridA-5128-2016cs
dc.identifier.scopus57202204633cs
dc.identifier.scopus35568432100cs
dc.identifier.urihttp://hdl.handle.net/11012/179568
dc.language.isoencs
dc.publisherMDPIcs
dc.relation.ispartofENERGIEScs
dc.relation.urihttps://www.mdpi.com/1996-1073/12/4/633cs
dc.rightsCreative Commons Attribution 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/1996-1073/cs
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/cs
dc.subjectdistrict heatingen
dc.subjectheat accumulationen
dc.subjectpipeen
dc.subjectnumerical modelen
dc.subjectModelica languageen
dc.subjectJulia languageen
dc.subjectperformanceen
dc.titlePerformant and Simple Numerical Modeling of District Heating Pipes with Heat Accumulationen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-155925en
sync.item.dbtypeVAVen
sync.item.insts2025.02.03 15:47:00en
sync.item.modts2025.01.17 22:32:20en
thesis.grantorVysoké učení technické v Brně. Fakulta strojního inženýrství. EÚ-odbor energetického inženýrstvícs
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