Study of thermo-physical properties and cycling stability of d -Mannitol-copper oxide nanocomposites as phase change materials

2018 ◽  
Vol 15 ◽  
pp. 245-255 ◽  
Author(s):  
Srikanth Salyan ◽  
S. Suresh
Keyword(s):  
Physical Properties ◽  
Copper Oxide ◽  
Phase Change ◽  
Phase Change Materials ◽  
Cycling Stability ◽  
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.

Enhancement of Soil Thermo-Physical Properties Using Microencapsulated Phase Change Materials for Ground Source Heat Pump Applications

2011 ◽  
Vol 110-116 ◽  
pp. 1191-1198 ◽  
Author(s):  
Pejman Keikhaei Dehdezi ◽  
Matthew R. Hall ◽  
Andrew R. Dawson
Keyword(s):  
Numerical Simulation ◽  
Physical Properties ◽  
Phase Change ◽  
Heat Pump ◽  
Phase Change Materials ◽  
Ground Source Heat Pump ◽  
Pump System ◽  
Ground Source ◽  
Thermo Physical Properties ◽  
Modified Soil

Soil can be modified with Phase Change materials (PCM) in order to enhance its thermo-physical properties and energy storage for ground source heat pump applications. This paper studies thermo-physical properties of soil modified with different amount of microencapsulated PCM. It is shown that increasing PCM amount in soil lead to lower thermal conductivity and increase of volumetric heat capacity of PCM-modified soil across the PCM melting temperature range. In addition, numerical simulation is performed to study the potential application of PCM-modified soil for reduction of temperature variations in ground. The result of numerical simulation revealed that temperature variation under PCM-modified soil can be reduced by up to 3°C compared to conventional soil. This could improve the Coefficient of performance of a heat pump system by more than 17%.

Nano-enhanced phase change materials: A review of thermo-physical properties, applications and challenges

2019 ◽  
Vol 21 ◽  
pp. 18-31 ◽  
Author(s):  
Kin Yuen Leong ◽  
Mohd Rosdzimin Abdul Rahman ◽  
Balamurugan A. Gurunathan
Keyword(s):  
Physical Properties ◽  
Phase Change ◽  
Phase Change Materials ◽  
Thermo Physical Properties

Thermo-Physical Properties of Phase Change Materials and those Natural Convection Heat Transfer in a Horizontal Enclosed Rectangular Container

2014 ◽  
Vol 620 ◽  
pp. 468-471 ◽  
Author(s):  
Yan Rong Li ◽  
Terumi Inagaki ◽  
Hiroki Kashiwa
Keyword(s):  
Heat Transfer ◽  
Natural Convection ◽  
Physical Properties ◽  
Phase Change ◽  
Phase Change Materials ◽  
Convection Heat Transfer ◽  
Natural Convection Heat Transfer ◽  
Convection Heat ◽  
Rectangular Container ◽  
Thermo Physical Properties

Thermo-physical properties of three kinds of phase change materials (sodium acetate trihydrate, erythritol and sodium sulfate decahydrate) were measured experimentally at various temperatures, in order to evaluate those temperature dependencies. Heat transfer by natural convection was also investigated in a horizontal enclosed rectangular container filled with the tested phase change materials, which was heated at the lower surface and cooled at the upper surface. It was found that the heat transfer coefficient of the liquid phase keeps good agreement with the conventional heat-transfer correlation of natural convection heat transfer in a horizontal enclosed rectangular container by applying the values of thermo-physical properties obtained in the present work.

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