Thermal management of using crystallization-controllable supercooled PCM in space heating applications for different heating profiles in the UK

Kutlu, Çağrı; Su, Yuehong; Lyu, Qinghua; Riffat, Saffa

doi:10.1016/j.renene.2023.02.077

Cited by 8 publications

(2 citation statements)

References 27 publications

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“…Although supercooling can complicate the search for thermodynamically stable functional molecular liquids and on-demand energy release from heat storage media, , it also presents opportunities to create new types of stimuli-responsive functional materials. Examples include mechanically induced crystallization of an SCL that can be used for rewritable inks, − as well as phase change materials that store heat that can be released when solidification is induced . The ability of SCLs to undergo solidification when exposed to a specific stimulus is key to their utility.…”

Section: Introductionmentioning

confidence: 99%

“…Examples include mechanically induced crystallization of an SCL that can be used for rewritable inks, 12 − 15 as well as phase change materials that store heat that can be released when solidification is induced. 16 The ability of SCLs to undergo solidification when exposed to a specific stimulus is key to their utility. Ideally, an SCL should be kinetically stable in the absence of this stimulus, so it can be stored indefinitely until solidification is desired.…”

Section: Introductionmentioning

confidence: 99%

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Robust Supercooled Liquid Formation Enables All-Optical Switching Between Liquid and Solid Phases of TEMPO

Rodriguez,

Lam,

Anwar

et al. 2024

ACS Omega

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Organic molecules that undergo supercooling can provide the basis for novel stimuli-responsive materials, but the number of such compounds is limited. Results in this paper show that the stable organic radical 2,2,6,6-tetramethyl-1-piperidine-1-oxyl (TEMPO) can form a stable supercooled liquid (SCL). Upon melting and cooling back to room temperature, the TEMPO SCL can persist for months, even after mild physical agitation. Its high vapor pressure can enable crystal growth at remote locations within the sample container over the course of days. Optical, electron paramagnetic resonance, and birefringence measurements show no evidence of new chemical species or partially ordered phases in the supercooled liquid. TEMPO's free radical character permits absorption of visible light that can drive photothermal melting to form the SCL, while a single nanosecond light pulse can initiate recrystallization of the SCL at some later time. This capability enables all-optical switching between the solid and the SCL phases. The physical origin of TEMPO's remarkable stability as an SCL remains an open question, but these results suggest that organic radicals comprise a new class of molecules that can form SCLs with potentially useful properties.

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