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Thermal Conductivity Measurement of Erythritol, Xylitol and Their Blends for Phase Change Materials Design: a Methodological Study
KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration. (Thermal Energy Storage (TES))ORCID iD: 0000-0002-1806-9749
KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.ORCID iD: 0000-0001-8516-0609
KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Heat and Power Technology.ORCID iD: 0000-0001-6982-2879
KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Applied Thermodynamics and Refrigeration.ORCID iD: 0000-0001-9556-552X
2018 (English)In: The 14th International Conference on Energy Storage, Adana, Turkey: IEA ECES , 2018, p. 364-378, article id 82Conference paper, Published paper (Refereed)
Abstract [en]

This work presents and discusses a detailed thermal conductivity assessment of erythritol, xylitol and their blends: 25 mol% erythritol and 80 mol% erythritol using the Transient Plane Source (TPS) method with a Hot Disk Thermal Constants Analyzer TPS-2500S. Their thermal conductivities were here found to be respectively: 0.59; 0.37; 0.39 and 0.54 W/(m·K) in the solid state, and to be 0.32; 0.43; 0.40 and 0.36 W/(m·K) in the liquid state. These obtained results are comprehensively and critically analyzed as compared to available literature data on the same materials, in the phase change materials (PCMs) design context. This study clearly indicates that the literature has considerable discrepancies among their presented thermal conductivities, and also as compared to the values found through the present investigation. Primary reason for these disparities are identified here as the lack of sufficiently transparent and repeatable data and procedure reporting, and relevant standards in this context. To exemplify the significance of such transparent and repeatable data reporting in thermal conductivity evaluations in the PCM design context, here focused on the TPS method, a comprehensive measurement validation is discussed along various residual plots obtained for varying input parameters (i.e., the heating power and time). Clearly, the variations in the input parameters give rise to various thermal conductivity results, where choosing the most coherent result requires a sequence of efforts per material, but there are no universally valid conditions. Transparent and repeatable data and procedure reporting is the key to achieve comparable thermal conductivity results, which are essential for the correct design of thermal energy storage systems using PCMs.

Place, publisher, year, edition, pages
Adana, Turkey: IEA ECES , 2018. p. 364-378, article id 82
Keywords [en]
phase change material (PCM), thermal energy storage (TES), thermal conductivity, transient hot plane/disk (TPS) method, erythritol, xylitol
National Category
Energy Systems
Research subject
Energy Technology; Materials Science and Engineering
Identifiers
URN: urn:nbn:se:kth:diva-233150ISBN: 978-975-487-218-7 (print)OAI: oai:DiVA.org:kth-233150DiVA, id: diva2:1237949
Conference
The 14th International Conference on Energy Storage- Enerstock2018 Çukurova University, Adana 25 - 28 April 2018 Çukurova University, Adana, Turkey
Note

QC 20180813

Available from: 2018-08-10 Created: 2018-08-10 Last updated: 2018-08-13Bibliographically approved

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Gunasekara, Samman NimaliIgnatowicz, MonikaChiu, Justin NingWeiMartin, Viktoria

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