Temperature Mapping Using Combined T2 and Diffusion Weighted MRI of Encapsulated Phase Change Materials

A spin–spin T 2 relaxation correlation with temperature is developed for core–shell particles containing eicosane. These phase change materials (PCMs) provide a novel NMR temperature sensor for studying spatial variations in packed bed heat transfer. Thermocouples are used to map the temperature fie...

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Bibliographic Details
Published in:Applied magnetic resonance 2023-12, Vol.54 (11-12), p.1589-1605
Main Authors: Skuntz, Matthew E., Anderson, Ryan, Codd, Sarah L., Seymour, Joseph D.
Format: Article
Language:English
Subjects:
Atoms and Molecules in Strong Fields
Core-shell particles
Correlation
Digitization
Heat transfer
Laser Matter Interaction
Magnetic fields
Magnetic resonance imaging
NMR
Nuclear magnetic resonance
Organic Chemistry
Original Paper
Packed beds
Phase change materials
Phase transitions
Physical Chemistry
Physics
Physics and Astronomy
Solid State Physics
Spectroscopy/Spectrometry
Temperature
Temperature distribution
Temperature sensors
Thermocouples
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Description
Summary:A spin–spin T 2 relaxation correlation with temperature is developed for core–shell particles containing eicosane. These phase change materials (PCMs) provide a novel NMR temperature sensor for studying spatial variations in packed bed heat transfer. Thermocouples are used to map the temperature field within the RF coil over a range of temperature. MRI T 2 maps at fixed temperatures are then used to develop a direct correlation between the NMR relaxation and temperature, allowing temperature maps to be measured. It is shown that using the combined effects of T 2 relaxation and diffusion weighting of the read imaging gradients, a robust temperature correlation can be developed.
ISSN:0937-9347
1613-7507
DOI:10.1007/s00723-023-01555-6