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Autor/a:
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Lázaro, Ana; Peñalosa, Conchita; Solé, Aran; Diarce, Gonzalo; Haussmann, Thomas; Fois, Magali; Zalba, Belén; Gschwander, Stefan; Cabeza, Luisa F.
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Notas:
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For the correct design of thermal storage systems using phase change materials (PCMs) in any application,
as well as for their simulation, it is essential to characterise the materials from thermophysical
and rheological standpoints (phase change enthalpy, thermal conductivity in solid and liquid phases, viscosity
and density in function of temperature). Taking advantage of the different research groups facilities
available in two international networks: within the IEA (International Energy Agency), the ECES Implementing
Agreement (Energy Conservation through Energy Storage IA) and SHC Programme (Solar Heating
and Cooling) Task 42/Annex 24 ‘‘Compact Thermal Energy Storage – Material Development for System
Integration’’, and the COST Action TU0802 ‘‘Next generation cost effective phase change materials for
increased energy efficiency in renewable energy systems in buildings (NeCoE-PCM)’’ a set of Round Robin
Tests (RRTs) was proposed. The objective was to come to comparable results for PCMs using Differential
Scanning Calorimetry (DSC) to determine their melting enthalpy as well as their melting and solidification
behaviour. The first RRT was without defining the procedure, the second one with a predefined procedure
for the measurements, but not for calibration and the third one with a predefined procedure for
calibration, for the measurements and also for the data evaluation. This paper presents the conclusions
after the three RRT. The main conclusion of the paper is that enthalpy in function of temperature determined
using a dynamic method for DSC can be influenced by certain reasons and finally a methodology to
avoid these influences have been proposed.
Authors would like to thank the manufacturers NETZSCH,
Mettler Toledo, TA Instruments and Perkin Elmer as well as all
the participants in the RRT and in the workshop. They would like
to thank very specially to the Fraunhofer ISE for the organization
of the Workshop.
Authors would like to acknowledge the contribution of
Dr. Macej Jaworski (Warsaw Institute of Technology, Poland),
M. Dolores Romero (AIDICO, Spain), National Institute of Chemistry
(Slovenia), Dr. A. Inés Fernández (University of Barcelona, Spain),
TU Wildau, Polymer Institute of Slovak Academy of Science
(Slovenia), Université de Pau (France), DLR (Germany).
Furthermore, they would like to thank the Spanish government
for partially funding this work, within the framework of research
projects ENE2011-28269-C03-01 and ENE2011-22722 and the
European Union (COST ACTION TU0802). The authors at the
University of Lleida would like to thank the Catalan Government
for the quality accreditation given to their research group (2009
SGR 534). Additionally we would thank the German Federal
Ministry for Economics and Technology for funding Fraunhofer’s
contribution to the IEA Task/Annex 42/24 within the project
‘‘PCM-Zentral’’ (Fkz 0327842A). |
