Segregation/cycling effects on thermo‐physical properties of salt hydrate phase change materials

2021 ◽  
Author(s):  
S.A. Nada ◽  
W. G. Alshaer ◽  
R.M. Saleh
Keyword(s):  
Physical Properties ◽  
Phase Change ◽  
Phase Change Materials ◽  
Salt Hydrate ◽  
Hydrate Phase ◽  
Thermo Physical Properties

scholarly journals Applicability of MCDM Algorithms for the Selection of Phase Change Materials for Thermal Energy Storage Heat Exchangers

2021 ◽  
pp. 611-622
Author(s):  
Paul Gregory Felix ◽  
Velavan Rajagopal ◽  
Kannan Kumaresan
Keyword(s):  
Energy Storage ◽  
Physical Properties ◽  
Phase Change ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Heat Exchangers ◽  
Phase Change Materials ◽  
Weight Estimation ◽  
Thermo Physical Properties ◽  
Selection Of

Latent heat thermal energy storage heat exchangers store heat energy by virtue of the phase transition that occurs in the thermal storage media. Since phase change materials (PCMs) are utilized as the media, there is a critical necessity for the appropriate selection of the PCM utilized. Since multiple thermo-physical properties and multiple PCMs are required to be evaluated for the selection, there arises a need for multiple criteria decision making (MCDM) algorithms to be adopted for the selection. But owing to the different weight estimation techniques employed and the voluminous quantity of selection algorithms available, there arises a need for a comparative methodology to be adopted. This study was intended to select an optimal PCM for a sustainable steam cooking application coupled with a thermal energy storage system. In this research study, six PCMs were chosen as the alternatives and five thermo-physical properties were chosen as the criteria for the evaluation. 11 different algorithms were augmented with 3 different weight estimation techniques and therefore a total of 33 algorithms were employed in this study. All of the algorithms have chosen Erythritol as the optimal PCM for the application. The outcomes of the MCDM algorithms have been validated through an intricate Pearson’s correlation coefficient study.

scholarly journals Consistent DSC and TGA Methodology as Basis for the Measurement and Comparison of Thermo-Physical Properties of Phase Change Materials

Materials ◽  
2020 ◽  
Vol 13 (20) ◽  
pp. 4486
Author(s):  
Lukas Müller ◽  
Gabriel Rubio-Pérez ◽  
Andreas Bach ◽  
Natalia Muñoz-Rujas ◽  
Fernando Aguilar ◽  
...  
Keyword(s):  
Physical Properties ◽  
Phase Change ◽  
Thermal Energy ◽  
Phase Change Materials ◽  
Material Selection ◽  
Selection Process ◽  
Renewable Energy Sources ◽  
Scanning Calorimetry ◽  
Similar Accuracy ◽  
Thermo Physical Properties

Measuring thermo-physical properties of phase change materials (PCM) in a consistent and reliable manner is essential for system layout of thermal energy storages and correspondingly material selection. Only if basic properties are assessed in a comparable way a selection process leads to the top candidate for any given application and thus enhances market penetration of renewable energy sources coupled with thermal energy storage. In this study, we focus on differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) as basic assessment techniques and develop consistent measurement procedures to create a database with comparable results. We show consistency of the measured results through analysis of coefficient of variation (CV), being in the mean 1.69%, 0.05%, 0.06% and 4.00% for enthalpy, melting onset, melting peak and maximum operating temperature, respectively. Overall, 23 PCM have been measured with the presented methodology, which was mainly possible due to the reduced measurement and preparation time per PCM compared to standard techniques, while achieving similar accuracy and precision.

scholarly journals Preparation and Supercooling Modification of Salt Hydrate Phase Change Materials Based on CaCl2·2H2O/CaCl2

Materials ◽  
2017 ◽  
Vol 10 (7) ◽  
pp. 691 ◽  
Author(s):  
Xiaoxiao Xu ◽  
Zhijun Dong ◽  
Shazim Memon ◽  
Xiaohua Bao ◽  
Hongzhi Cui
Keyword(s):  
Phase Change ◽  
Phase Change Materials ◽  
Salt Hydrate ◽  
Hydrate Phase
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