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Universal approach to modelling multi-layer structures in building energy simulations

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dc.contributor.author Hillary, Jason
dc.contributor.author Walsh, Ed J.
dc.contributor.author Shah, Amip
dc.contributor.author Zhou, Rongliang
dc.contributor.author Walsh, Pat A.
dc.date.accessioned 2018-05-14T10:47:53Z
dc.date.issued 2018
dc.identifier.uri http://hdl.handle.net/10344/6836
dc.description peer-reviewed en_US
dc.description.abstract Building energy simulations have found widespread use as decision-making tools for determining design and retrofitting actions. Despite their popularity, there exists a well-reported issue regarding the numerical treatment of structural thermalstorage components in these models. The optimal means of discretising multi-layer structures is complicated by the different thermo-physical properties, material configurations and boundary conditions encountered within building energy models. This paper addresses this information gap by proposing a methodology that can be universally applied to all multi-layer structures, ensuring accurate predictions while avoiding excessive computational cost. Governing dimensionless quantities of Biot and Fourier numbers are utilised within the discretisation process, making the methodology equally applicable to all materials. The presented methodology also accounts for the configuration of materials within multi-layer structures when assigning discretisation levels, leading to nodes being distributed in accordance with expected thermal gradients. The proposed discretisation methodology has been examined for a number of boundary conditions and wall types with excellent prediction accuracy achieved throughout. Additionally, the utility of resistance-only layers has been explored as a means of increasing computational efficiency. This highlighted the importance of considering both layer position and local thermal properties when simulating multi-layer structures. en_US
dc.language.iso eng en_US
dc.publisher Elsevier en_US
dc.relation.ispartofseries Energy and Buildings;170, pp. 122-133
dc.relation.uri https://doi.org/10.1016/j.enbuild.2018.04.009
dc.rights This is the author’s version of a work that was accepted for publication in Energy and Buildngs. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Energy and Buildings, 2018, 170, pp. 122-133, https://doi.org/10.1016/j.enbuild.2018.04.009 en_US
dc.subject buildings energy models en_US
dc.subject discretisation en_US
dc.subject multi-layer walls en_US
dc.subject RC networks en_US
dc.subject biot and fourier numbers en_US
dc.title Universal approach to modelling multi-layer structures in building energy simulations en_US
dc.type info:eu-repo/semantics/article en_US
dc.type.supercollection all_ul_research en_US
dc.type.supercollection ul_published_reviewed en_US
dc.identifier.doi 10.1016/j.enbuild.2018.04.009
dc.contributor.sponsor IRC en_US
dc.embargo.terms 2020-04-17 en_US
dc.rights.accessrights info:eu-repo/semantics/openAccess en_US
dc.internal.rssid 2869390


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