Phase Change Dispersion Made by Condensation–Emulsification
Name
fischer-et-al-2021-phase-change-dispersion-made-by-condensation-emulsification.pdf
Size
5.39 MB
Format
Adobe PDF
Checksum (MD5)
a9b16eeb2db3e05c620d6c8fafcbf092
Author(s)
Fischer, Ludger J.
Dhulipala, Somayajulu
Varanasi, Kripa K.
Date Issued
December 6, 2021
Journal
ACS Omega
Publisher
American Chemical Society
Citation
ACS Omega 2021, 6, 50, 34580–34595.
Version
Final published version
Abstract
Cooling processes require heat transfer fluids with high specific heat capacity. For cooling processes below 0 °C, water has to be diluted with organic liquids to prevent freezing, with the undesired effect of reduced specific heat capacity. Phase change dispersions, PCDs, consist of a phase change material, PCM, being dispersed in a continuous phase. This allows for using the PCD as heat transfer fluid with a very high apparent specific heat capacity within a specified, limited temperature range. So far, the PCMs being reported in the literature are paraffins, fatty acids, or esters and are used for isothermal cooling applications between +4 and +50 °C. They are manufactured by high shear equipment like rotor-stator systems. A recently published method to produce emulsions by the direct condensation of the dispersed phase into the emulsifier-containing continuous phase is applied on this PCD. n-Decane is used as PCM, and the melting temperature is -30 °C. The achieved apparent specific heat capacity lies above 15 kJ/kg·K, more than 3 times the value of water. This paper presents experimental methods and data, formulation details, and thermophysical and rheological properties of such new PCD. Food conservation or isothermal cooling of lithium-ion batteries is a potential application for the presented method. The properties of the developed PCD were determined, and the successful application of such a PCD at -30 °C has been demonstrated.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
Terms of Use
Creative Commons Attribution-NonCommercial-NoDerivs License
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1021/acsomega.1c04940
