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Thermal conductivity measurement of erythritol, xylitol, and their blends for phase change material design: A methodological study
KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Heat and Power Technology. (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, Heat and Power Technology.ORCID iD: 0000-0001-9556-552X
2019 (English)In: International journal of energy research (Print), ISSN 0363-907X, E-ISSN 1099-114X, Vol. 43, no 5, p. 1785-1801Article in journal (Refereed) Published
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. Thereby, the thermal conductivities of xylitol, 25 mol% erythritol, 80 mol% erythritol, and erythritol were here found for respectively in the solid state to be 0.373, 0.394, 0.535, and 0.589 W m−1 K−1 and in the liquid state to be 0.433, 0.402, 0.363, and 0.321 W m−1 K−1. 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 these thermal conductivity data in literature have considerable discrepancies between the literature sources and as compared to the data obtained in the present investigation. Primary reasons 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 (ie, 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, because there are no universally valid conditions. Transparent and repeatable data and procedure reporting are 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
John Wiley & Sons, 2019. Vol. 43, no 5, p. 1785-1801
Keywords [en]
erythritol, phase change materials, thermal conductivity, thermal energy storage, transient plane source method, xylitol
National Category
Energy Engineering
Research subject
Energy Technology
Identifiers
URN: urn:nbn:se:kth:diva-244594DOI: 10.1002/er.4403ISI: 000461866900010Scopus ID: 2-s2.0-85063231614OAI: oai:DiVA.org:kth-244594DiVA, id: diva2:1291087
Conference
14th International Conference on Energy Storage EnerSTOCK 2018, Adana, Turkey on 25-28 April 2018 at Cukurova University.
Projects
Energimyndigheten project 34948‐1
Funder
Swedish Energy Agency, 34948‐1
Note

QC 20190228

Available from: 2019-02-22 Created: 2019-02-22 Last updated: 2019-05-02Bibliographically approved

Open Access in DiVA

The full text will be freely available from 2020-02-22 10:37
Available from 2020-02-22 10:37

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Gunasekara, Samman NimaliIgnatowicz, MonikaChiu, Justin NingWeiMartin, Viktoria

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Gunasekara, Samman NimaliIgnatowicz, MonikaChiu, Justin NingWeiMartin, Viktoria
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