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Review of stability and thermal conductivity enhancements for salt hydrates

Journal Article · · Journal of Energy Storage

Salt hydrates can be used as phase change materials for thermal energy storage. Critical technical challenges for their widespread deployment include poor cycling stability, large supercooling, and low thermal conductivity. Here in this work, numerous enhancement techniques are reviewed. Related to stability, numerous existing methods to characterize the number of thermal cycles are summarized. Following this, 11 techniques to mitigate phase separation (plus 9 studies on macro-, micro-, and nano-encapsulation types) are reviewed. For supercooling, 38 nucleator-salt hydrate combinations to minimize subcooling are reviewed. The empirically observed effect of isomorphism in minimizing subcooling is explored and discussed, with cross-study trends depicted for 38 nucleators across 9 salt hydrates. In addition, several studies reporting combined effects on stability and supercooling are presented. Related to thermal conductivity, 32 combinations of conductivity enhancement material and salt hydrate are reviewed. For those using graphite, the dependence of conductivity enhancement on graphite mass fraction is shown across numerous studies for different graphite types. The performance and stability of calcium chloride hexahydrate, sodium sulfate decahydrate, and sodium acetate were explored and are discussed in-depth. Finally, the status of enhancement to salt hydrates is summarized, and remaining challenges are identified.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Building Technologies Office (EE-5B)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1546520
Alternate ID(s):
OSTI ID: 1781262
Journal Information:
Journal of Energy Storage, Journal Name: Journal of Energy Storage Journal Issue: C Vol. 24; ISSN 2352-152X
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

References (78)

Solidification in heat packs: I. Nucleation rate journal February 2003
Properties of some salt hydrates for latent heat storage journal January 1977
Immersion corrosion tests on metal-salt hydrate pairs used for latent heat storage in the 48 to 58°C temperature range journal December 2002
Fabrication and characterization of micro-encapsulated sodium phosphate dodecahydrate with different crosslinked polymer shells journal May 2013
Gelled Na2HPO4 · 12H2O with amylose-g-sodium acrylate: heat storage performance, heat capacity and heat of fusion journal June 2009
CaCl2·6H2O/Expanded graphite composite as form-stable phase change materials for thermal energy storage journal July 2013
Preparation and thermal characterization of sodium acetate trihydrate/expanded graphite composite phase change material journal April 2016
Suppressing supercooling in magnesium nitrate hexahydrate and evaluating corrosion of aluminium alloy container for latent heat storage application journal March 2017
Improvement of supercooling and thermal conductivity of the sodium acetate trihydrate for thermal energy storage with α-Fe2O3 as addictive journal March 2018
Effect of electric currents on the nucleation of ice crystals in the melt journal August 1981
Electrical nucleation and growth of NaCH3COO·3H2O journal January 1990
An investigation of the thermal energy storage capacity of Glauber's salt with respect to thermal cycling journal January 1980
Melt-freeze-cycle life-testing of Glauber's salt in a rolling cylinder heat store journal January 1982
The effect of crystal size on the thermal energy storage capacity of thickened Glauber's salt journal January 1983
Low temperature latent heat thermal energy storage: Heat storage materials journal January 1983
Phase change stability of CaCl2·6H2O journal January 1984
Heat storage capacity of sodium acetate trihydrate during thermal cycling journal January 1984
Thermal energy storage in salt hydrates journal July 1980
Mixtures of calcium chloride hexahydrate with some salt hydrates or anhydrous salts as latent heat storage materials journal January 1988
Phase separation and supercooling of a latent heat-storage material journal December 1989
Phase change materials for energy storage nucleation to prevent supercooling journal July 1992
Prevention of supercooling and stabilization of inorganic salt hydrates as latent heat storage materials journal July 1992
Durability of latent heat storage tube-sheets journal January 1987
A laboratory study of ice nucleation due to electrical discharge journal February 2002
Thermal performance of sodium acetate trihydrate thickened with different materials as phase change energy storage material journal September 2003
Heterogeneous nucleation of thermal storage material LiNO3·3H2O from stable lattice-matched nucleation catalysts journal February 2015
Experimental investigations on heat transfer in phase change materials (PCMs) embedded in porous materials journal April 2011
Tuning of thermal properties of sodium acetate trihydrate by blending with polymer and silver nanoparticles journal January 2014
Thermal property and latent heat energy storage behavior of sodium acetate trihydrate composites containing expanded graphite and carboxymethyl cellulose for phase change materials journal January 2015
Preparation and thermal energy storage studies of CH3COONa·3H2O–KCl composites salt system with enhanced phase change performance journal June 2016
Preparation research of novel composite phase change materials based on sodium acetate trihydrate journal May 2017
Modification of expanded graphite and its adsorption for hydrated salt to prepare composite PCMs journal March 2018
Thermal performance of sodium acetate trihydrate based composite phase change material for thermal energy storage journal October 2018
Thermal Conductivity Enhancement of Sodium Acetate Trihydrate by Adding Graphite Powder and the Effect on Stability of Supercooling journal May 2015
Phase change materials and products for building applications: A state-of-the-art review and future research opportunities journal May 2015
Review on using microencapsulated phase change materials (PCM) in building applications journal November 2015
A review on phase change energy storage: materials and applications journal June 2004
Fast thermal cycling of acetanilide and magnesium chloride hexahydrate for indoor solar cooking journal December 2009
Hydrated salts/expanded graphite composite with high thermal conductivity as a shape-stabilized phase change material for thermal energy storage journal September 2015
Influence of temperature and salt concentration on the salt weathering of a sedimentary stone with sodium sulphate journal October 2010
Experimental investigation on supercooling, thermal conductivity and stability of nanofluid based composite phase change material journal June 2018
Exploring additives for improving the reliability of zinc nitrate hexahydrate as a phase change material (PCM) journal December 2018
Experimental investigation on copper foam/hydrated salt composite phase change material for thermal energy storage journal December 2017
Experimental study on effect of electric field on hydrate nucleation in supercooled tetra-n-butyl ammonium bromide aqueous solution journal August 2012
Thermal charging performance of enhanced phase change material composites for thermal battery design journal May 2018
Expanded graphite for thermal conductivity and reliability enhancement and supercooling decrease of MgCl2⋅6H2O phase change material journal June 2018
Review on Thermal Conductivity of Nanofluids journal January 2017
Corrosion of metal containers for use in PCM energy storage journal April 2015
Experimental studies on the supercooling and melting/freezing characteristics of nano-copper/sodium acetate trihydrate composite phase change materials journal December 2016
Review on microencapsulated phase change materials (MEPCMs): Fabrication, characterization and applications journal October 2011
Review on phase change material emulsions and microencapsulated phase change material slurries: Materials, heat transfer studies and applications journal January 2012
A review on effect of phase change material encapsulation on the thermal performance of a system journal October 2012
A review of microencapsulation methods of phase change materials (PCMs) as a thermal energy storage (TES) medium journal March 2014
Types, methods, techniques, and applications for microencapsulated phase change materials (MPCM): A review journal January 2016
A review on current status and challenges of inorganic phase change materials for thermal energy storage systems journal April 2017
Thermal cycle testing of calcium chloride hexahydrate as a possible PCM for latent heat storage journal August 2008
Phase change performance of sodium acetate trihydrate with AlN nanoparticles and CMC journal September 2011
Salt hydrates as latent heat storage materials:Thermophysical properties and costs journal February 2016
Solidification behavior and thermal conductivity of bulk sodium acetate trihydrate composites with thickening agents and graphite journal February 2016
Reduction of the subcooling of bischofite with the use of nucleatings agents journal December 2016
Use of nano-α-Al2O3 to improve binary eutectic hydrated salt as phase change material journal February 2017
Preparation and characterization of an inorganic magnesium chloride/nitrate/graphite composite for low temperature energy storage journal February 2018
Fabrication and characteristics of composite phase change material based on Ba(OH)2·8H2O for thermal energy storage journal June 2018
Sodium acetate trihydrate-chitin nanowhisker nanocomposites with enhanced phase change performance for thermal energy storage journal May 2018
Study of magnesium chloride hexahydrate as heat storage material journal October 2012
Preparation and characterization of hydrated salts/silica composite as shape-stabilized phase change material via sol–gel process journal September 2014
Advanced Nanocomposite Phase Change Material Based on Calcium Chloride Hexahydrate with Aluminum Oxide Nanoparticles for Thermal Energy Storage journal May 2017
Surfactant-Free Polyurethane Nanocapsules via Inverse Pickering Miniemulsion journal March 2015
Supercooling Suppression and Thermal Conductivity Enhancement of Na 2 HPO 4 ·12H 2 O/Expanded Vermiculite Form-Stable Composite Phase Change Materials with Alumina for Heat Storage journal March 2018
Calcium chloride hexahydrate: a phase-changing material for energy storage journal March 1985
MECHANICAL STIMULUS TO CRYSTALLIZATION IN SUPER-COOLED LIQUIDS. 1 journal February 1911
In Situ Synthesis and Phase Change Properties of Na 2 SO 4 ·10H 2 O@SiO 2 Solid Nanobowls toward Smart Heat Storage journal September 2011
Nucleation of Freezing by Cavity Collapse and its Relation to Cavitation Damage journal May 1965
A temperature-responsive poly(vinyl alcohol) gel for controlling fluidity of an inorganic phase change material journal January 2017
Nucleation of Solid in an Undercooled Liquid by Cavitation journal January 1966
Thermal conductivity of ice journal September 1980
Effect of Electrostatic Field on Freezing of Supercooled Water and Insects journal February 1961
Preparation and Thermal Performance Enhancement of Low Temperature Eutectic Composite Phase Change Materials Based on Na2SO4·10H2O journal November 2018

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Preparation and characterization of urea/ammonia bromide composite phase change material journal April 2020

Figures / Tables (18)


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