In this paper, methodologies based on thermal analysis to evaluate specific heat capacity, phase transition enthalpies, thermal cycling stability and thermal conductivity of organic phase change materials (PCMs) are discussed. Calibration routines for a disc type heat flow differential scanning calorimetry (hf-DSC) are compared and the applied heating rates are adapted due to the low thermal conductivity of the organic PCMs. An assessment of thermal conductivity measurements based on “Laser Flash Analysis” (LFA) and the “Transient Hot Bridge” method (THB) in solid and liquid state has been performed. It could be shown that a disc type hf-DSC is a useful method for measuring specific heat capacity, melting enthalpies and cycling stability of organic PCM if temperature and sensitivity calibration are adapted to the material and quantity to be measured. The LFA method shows repeatable and reproducible thermal diffusivity results in solid state and a high effort for sample preparation in comparison to THB in liquid state. Thermal conductivity results of the two applied methods show large deviations in liquid phase and have to be validated by further experiments.
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7 July 2016
THERMOPHYSICS 2016: 21st International Meeting
12–14 October 2016
Terchova, Slovakia
Research Article|
July 07 2016
Thermal analysis on organic phase change materials for heat storage applications Available to Purchase
Daniel Lager
Daniel Lager
a)
1
AIT Austrian Institute of Technology
GmbH Energy Department - Sustainable Thermal Energy Systems Giefinggasse 2, 1210 Vienna, Austria
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Daniel Lager
1,a)
1
AIT Austrian Institute of Technology
GmbH Energy Department - Sustainable Thermal Energy Systems Giefinggasse 2, 1210 Vienna, Austria
a)
Corresponding author: [email protected]
AIP Conf. Proc. 1752, 030001 (2016)
Citation
Daniel Lager; Thermal analysis on organic phase change materials for heat storage applications. AIP Conf. Proc. 7 July 2016; 1752 (1): 030001. https://doi.org/10.1063/1.4955229
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