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The award-winning Phase Change Matters blog tracks the latest news and research on phase change materials and thermal energy storage. E-mail tips and comments to Ben Welter, communications director at Entropy Solutions. Follow the blog on Twitter at @PureTemp. Subscribe to the weekly PCM newsletter. Or join the discussion on LinkedIn.

Two Entropy advisors, Dr. Mohammed Farid and Lucas B. Hyman, are pleased to take your questions about PCMs and thermal energy storage. Send your questions to bwelter@puretemp.com. We'll select the best and post the answers here each week.

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Patent application: Composite foam and methods of preparation and use

Ben Welter - Thursday, March 23, 2017

U.S. patent application 20170072604 (applicant Empire Technology Development LLC, Wilmington, Del.):

"Composite foams having cells containing shape-stabilized phase change material (ss-PCM) particles are described. Composite foams may be made by contacting a plurality of ss-PCM particles and one or more pre-polymer reactants, wherein each ss-PCM particle can form a nucleation site for foam cell generation. The composite foams may be used in regulating the temperature of an article wherein the foam undergoes a phase transition as the surrounding temperature of the article approaches the foam's phase transition temperature. The thermostatic material may exchange heat with the article during the phase transition, resulting in regulation of the temperature of the article. The composite foams may be used as a thermostatic packaging material having a cavity for storing goods."

http://www.freepatentsonline.com/20170072604.pdf

Research roundup: PCM compatibility with metals, plastic; desiccant packet for cooling vest; paraffin viscosity; more

Ben Welter - Thursday, March 23, 2017

Investigation of the corrosive properties of phase change materials in contact with metals and plastic [Renewable Energy]

Preparation and thermal properties of SAT-CMC-DSP/EG composite as phase change material [Applied Thermal Engineering]

A numerical study on the usage of phase change material (PCM) to prolong compressor off period in a beverage cooler [Energy Conversion and Management]

Abilities and limitations of thermal mass activation for thermal comfort, peak shifting and shaving: A review [Building and Environment]

Corrosion effect of phase change materials in solar thermal energy storage application [Renewable and Sustainable Energy Reviews]

A review for phase change materials (PCMs) in solar absorption refrigeration systems [Renewable and Sustainable Energy Reviews]

Sodium nitrate – Diatomite composite materials for thermal energy storage [Solar Energy]

Innovative PCM-desiccant packet to provide dry microclimate and improve performance of cooling vest in hot environment [Energy Conversion and Management]

Heat transfer study of phase change materials with graphene nano particle for thermal energy storage [Solar Energy]

Energy performance evaluation of heat-storage gypsum board with hybrid SSPCM composite [Journal of Industrial and Engineering Chemistry]

Empirical equation to estimate viscosity of paraffin [Journal of Energy Storage]

Yearly energy performance of a photovoltaic-phase change material (PV-PCM) system in hot climate [Solar Energy]

Research roundup: Microcapsule-based composites; porous cellulose acetate films; underfloor heating; more

Ben Welter - Tuesday, March 07, 2017

Experimental study on effective thermal conductivity of microcapsules based phase change composites [International Journal of Heat and Mass Transfer]

Multi-objective RSM Optimization of Fin Assisted Latent Heat Thermal Energy Storage System Based on Solidification Process of Phase Change Material in Presence of Copper Nanoparticles [Applied Thermal Engineering]

Buildings cooling: An experimental study of phase change materials storage for low-energy buildings [2017 International Conference on Communication, Control, Computing and Electronics Engineering ]

Aluminum Mesh and Phase-Change Characteristics of n-Octadecane for Thermal Energy Storage [Journal of Thermophysics and Heat Transfer]

Analytical analysis of latent heat thermal energy storage model for solar thermal power plants [14th International Bhurban Conference on Applied Sciences and Technology]

Analysis of graphene-encapsulated polymer microcapsules with superior thermal and storage stability behavior [Polymer Degradation and Stability]

Experimental and numerical investigations on the thermal performance of building plane containing CaCl2·6H2O/expanded graphite composite phase change material [Applied Energy]

Fabrication and characterization of porous cellulose acetate films by breath figure incorporated with capric acid as form-stable phase change materials for storing/retrieving thermal energy [Fibers and Polymers]

In-situ preparation of a shape stable phase change material [Renewable Energy]

Proposal of a PCM Underfloor Heating System Using a Web Construction Method [pdf] [International Journal of Polymer Science]

Research roundup: Novel PCM plaster; chitosan-derived carbon aerogel; carboxylic esters; Trnsys simulation; more

Ben Welter - Thursday, March 02, 2017

Thermal effects of a novel phase change material (PCM) plaster under different insulation and heating scenarios [Energy and Buildings]

Form-stable phase change material embedded with chitosan-derived carbon aerogel [Materials Letters]

Investigation of Unbranched, Saturated, Carboxylic Esters as Phase Change Materials [Renewable Energy]

A simulation study of a solar collector using phase change materials for air heating application needs [AIP Conference Proceedings]

Intensification of monostearin (phase change material) synthesis in infrared radiated rotating reactor: Optimization and heterogeneous kinetics [Energy Conversion and Management]

Preparation research of novel composite phase change materials based on sodium acetate trihydrate [Applied Thermal Engineering]

The quasi-enthalpy based lattice Boltzmann model for solid-liquid phase change [Applied Thermal Engineering]

Synthesis and thermal properties of novel solid-solid phase change materials with comb-polyurethane block copolymer structure for thermal energy storage [Thermochimica Acta]

Synthesis of epoxy-loaded poly(melamine-formaldehyde) microcapsules: effect of pH regulation method and emulsifier selection [Colloids and Surfaces A: Physicochemical and Engineering Aspects]

Dual-encapsulation of octadecanol in thermal/electric conductor for enhanced thermoconductivity and efficient energy storage [Materials Chemistry Frontiers]

A Trnsys simulation of a solar-driven ejector air conditioning system with an integrated PCM cold storage [AIP Conference Proceedings]

Research roundup: 2 promising PCM candidates; calcium carbonate shell; thermocapillary effects; more

Ben Welter - Tuesday, February 21, 2017

Thermal properties characterization of two promising phase change material candidates [Journal of Thermal Analysis and Calorimetry]

Self-assembly synthesis and properties of microencapsulated n-tetradecane phase change materials with calcium carbonate shell for cold energy storage [ACS Sustainable Chemistry and Engineering]

Thermal Analysis of a Thermal Energy Storage Unit to Enhance a Workshop Heating System Driven by Industrial Residual Water [Energies]

Effect of a low-cost parabolic reflector on the charging efficiency of an evacuated tube collector/storage system with a PCM [Solar Energy]

Numerical study on free-surface jet impingement cooling with nanoencapsulated phase-change material slurry and nanofluid [International Journal of Heat and Mass Transfer]

Heat transfer performance and melting dynamic of a phase change material subjected to thermocapillary effects [International Journal of Heat and Mass Transfer]

Evaluation and optimization of melting performance for a latent heat thermal energy storage unit partially filled with porous media [Applied Energy]

Carbon nanotube/paraffin/montmorillonite composite phase change material for thermal energy storage [Solar Energy]

Synthesis and thermal properties of novel solid-solid phase change materials with comb-polyurethane block copolymer structure for thermal energy storage [Thermochimica Acta]

Synthesis and Properties of Polyurethane/Coal-Derived Carbon Foam Phase Change Composites for Thermal Energy Storage [Acta Physico-Chimica Sinica]

Research roundup: Encapsulation techniques for inorganic PCM; effects of flake graphite nanoparticles; more

Ben Welter - Monday, February 13, 2017

From Renewable and Sustainable Energy Reviews:

A review on encapsulation techniques for inorganic phase change materials and the influence on their thermophysical properties
Phase equilibrium in the design of phase change materials for thermal energy storage: State-of-the-art

From Applied Thermal Engineering:

Investigating the impact of Cp-T values determined by DSC on the PCM-CFD Model
Performance of a Finned, Latent-Heat Storage System for Solar Thermal Power Application

From Applied Energy:

Impact of periodic flow reversal of heat transfer fluid on the melting and solidification processes in a latent heat shell and tube storage system
The effects of flake graphite nanoparticles, phase change material, and film cooling on the solar still performance
A quick-fix design of phase change material by particle blending and spherical agglomeration

From Journal of the Taiwan Institute of Chemical Engineers:

Phase-change heat transfer in a cavity heated from below: The effect of utilizing single or hybrid nanoparticles as additives

From Energy:

Field evaluation of microencapsulated phase change material slurry in ground source heat pump systems

From Renewable Energy:

Numerical studies on thermal and electrical performance of a fully wetted absorber PVT collector with PCM as a storage medium
Glass encapsulated phase change materials for high temperature thermal energy storage

From SAE World Congress Experience:

Integration and Validation of Thermal Energy Storage System for Electric Vehicle Cabin Heating

From Engineering Technology International Conference 2016:

Preparation and characterization of form-stable paraffin/polycaprolactone composites as phase change materials for thermal energy storage

Research roundup: PU-PCM in refrigerated vehicle; indirect solar dryer; triplex tube heat exchangers; more

Ben Welter - Thursday, February 02, 2017

Experimental and numerical study of insulation walls containing a composite layer of PU-PCM and dedicated to refrigerated vehicle [Applied Thermal Engineering]

Development and experimental validation of a CFD model for PCM in a vertical triplex tube heat exchanger [Applied Thermal Engineering]

Recycled additions for improving the thermal conductivity of concrete in preparing energy storage systems [Construction and Building Materials]

Thermal behavior of indirect solar dryer: nocturnal usage of solar air collector with PCM [Journal of Cleaner Production]

Solar still with latent heat energy storage: A review [Innovative Food Science & Emerging Technologies]

2-D numerical investigation of melting of an impure PCM in the arbitrary-shaped annuli [International Journal of Thermal Sciences]

Melting enhancement in triplex-tube latent heat energy storage system using nanoparticles-metal foam combination [Applied Energy]

A concept of a thermal comfort system with energy storage in structure of the building [Problemy Eksploatacji]

Impact of Sodium Silicate Pentahydrate as Phase Change Material in Concrete Cubes for Enhancing the Thermal Comfort [pdf]
[International Journal of Civil Engineering and Technology]

Research roundup: Nano-sized phase change emulsions; porous triamide-linked polymers; thermoregulation of fabric; more

Ben Welter - Thursday, January 19, 2017

Preparation and characterization of nano-sized phase change emulsions as thermal energy storage and transport media [Applied Energy]

Largely enhanced thermal conductivity of poly (ethylene glycol)/ boron nitride composite phase change materials for solar-thermal-electric energy conversion and storage with very low content of graphene nanoplatelets [Chemical Engineering Journal]

Effect of an increased thermal contact resistance in a salt PCM-graphite foam composite TES system [Renewable Energy]

Experimental investigation on potential of a concentrated photovoltaic-thermoelectric system with phase change materials [Energy]

PEG encapsulated by porous triamide-linked polymers as support for solid-liquid phase change materials for energy storage [Chemical Physics Letters]

Morphological characterization and applications of phase change materials in thermal energy storage: A review [Renewable and Sustainable Energy Review]

Preparation and thermal properties of short carbon fibers/erythritol phase change materials [Energy Conversion and Management]

Preparation and properties of fatty acid eutectics/expanded perlite and expanded vermiculite shape-stabilized materials for thermal energy storage in buildings [Energy and Buildings]

Thermoregulation in Thermo-regulating Fabric: An Overview [pdf] [International Journal of Scientific Research in Science, Engineering and Technology]

Research roundup: Sunlight-driven eutectic PCMs; shape-stabilized PEG; modified solar still; more

Ben Welter - Thursday, January 12, 2017

Development of sunlight-driven eutectic phase change material nanocomposite for applications in solar water heating [Resource-Efficient Technologies]

Performance investigation of a lab–scale latent heat storage prototype – Numerical results [Energy Conversion and Management]

A functional form-stable phase change composite with high efficiency electro-to-thermal energy conversion [Applied Energy]

Experimental and numerical investigation of a tube-in-tank latent thermal energy storage unit using composite PCM [Applied Energy]

Shape-stabilized poly(ethylene glycol) (PEG)-cellulose acetate blend preparation with superior PEG loading via microwave-assisted blending [Solar Energy]

Thermal and morphological studies on novel PCM microcapsules containing n-hexadecane as the core in a flexible shell [Applied Energy]

Observational study of modified solar still coupled with oil serpentine loop from cylindrical parabolic concentrator and phase changing material under basin [Solar Energy]

Storing energy for cooling demand management in tropical climates: a techno-economic comparison between different energy storage technologies [Energy]

Dynamic simulation of an integrated solar-driven ejector based air conditioning system with PCM cold storage [Applied Energy]

Thermal stability of Na2CO3-Li2CO3 as a high temperature phase change material for thermal energy storage [Thermochimica Acta]

Stearic acid modified montmorillonite as emerging microcapsules for thermal energy storage [Applied Clay Science]

Research roundup: Dicarboxylic acid eutectic mixture; viscosity, heat capacity of fatty acids; cool colored coating; more

Ben Welter - Wednesday, January 04, 2017

A novel medium-temperature form-stable phase change material based on dicarboxylic acid eutectic mixture/expanded graphite composites [Solar Energy]

Empirical equations for viscosity and specific heat capacity determination of fatty acids [Journal of Energy Storage]

Cool colored coating and phase change materials as complementary cooling strategies for building cooling load reduction in tropics [Applied Energy]

Experimental Study on Specific Heat of Concrete at High Temperatures and Its Influence on Thermal Energy Storage [Energies]

Investigations on the thermal stability, long-term reliability of LiNO3/KCl – expanded graphite composite as industrial waste heat storage material and its corrosion properties with metals [Applied Energy]