129444 20231219145827.0 doi 10.1016/j.applthermaleng.2017.07.035 sideral 100745 ART-2017-100745 eng Mazo, Javier (orcid)0000-0001-7631-8507 Evaluation of the suitability of different calorimetric methods to determine the enthalpy-temperature curve of granular PCM composites 2017 The present research has analyzed the complementarity of different measuring methodologies when characterizing the phase changing behaviour of a granular PCM composite (GPCC) through a comparison of their results. Specifically, the enthalpy variation of the GR31 product manufactured by Rubitherm has been measured by using: (1) An energy balance calculation of an air stream flowing through a GPCC packed bed; (2) Differential Scanning Calorimetry; (3) the T-history method. The main purpose of this study was to evaluate the suitability of these methods for the enthalpy-temperature curve determination of GPCC. The energy balance setup gave an accurate measurement of the enthalpy variation within a sufficiently high temperature interval. Obtaining a representative sample was not a problem using this method, in contrast to the DSC which requires a greater number of tests to obtain an average value representative of the packed bed. However, the energy balance method does not enable the direct determination of the enthalpy-temperature curve. The T-history methodology allows the enthalpy to be determined based on temperature while the representativeness problem of the DSC is avoided due to the higher sample volume. Nevertheless, the sample must be altered, crushed and subsequently compacted to reduce the effects of the thermal resistances provoked by the void spaces being filled by air. This comparison has shown that there is no single valid methodology for characterizing the phase changing behaviour of PCM granules. Access copy available to the general public Unrestricted info:eu-repo/grantAgreement/ES/MICINN/ENE2014-57262-R info:eu-repo/grantAgreement/ES/MICINN/ENE2011-22722 info:eu-repo/grantAgreement/ES/MICINN/ENE2011-28269-C03-01 info:eu-repo/semantics/openAccess by-nc-nd http://creativecommons.org/licenses/by-nc-nd/3.0/es/ 3.771 2017 ENGINEERING, MECHANICAL 12 / 128 = 0.094 2017 Q1 T1 THERMODYNAMICS 8 / 59 = 0.136 2017 Q1 T1 MECHANICS 10 / 134 = 0.075 2017 Q1 T1 ENERGY & FUELS 31 / 96 = 0.323 2017 Q2 T1 1.505 2017 Industrial and Manufacturing Engineering 2017 Q1 Energy Engineering and Power Technology 2017 Q1 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Delgado, Mónica (orcid)0000-0002-8015-4469 Peñalosa, Conchita (orcid)0000-0002-9500-974X Dolado, Pablo (orcid)0000-0002-2161-3362 Miranda, Inés Lázaro, Ana Universidad de Zaragoza (orcid)0000-0001-7360-4188 Marín, José María Universidad de Zaragoza (orcid)0000-0002-2463-7271 Zalba, Belén Universidad de Zaragoza (orcid)0000-0002-6101-580X 5004 590 Universidad de Zaragoza Dpto. Ingeniería Mecánica Área Máquinas y Motores Térmi. 125 (2017), 306-316 Appl. therm. eng. Applied Thermal Engineering 1359-4311 1535141 http://zaguan.unizar.es/record/129444/files/texto_completo.pdf Postprint 562007 http://zaguan.unizar.es/record/129444/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:129444 articulos driver 2023-12-19-13:59:03 ARTICLE