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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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Research roundup: Flexible PCMs with high thermal conductivity; treatment for exercise-induced muscle damage; more

Ben Welter - Thursday, August 31, 2017

Thermal sensitive flexible phase change materials with high thermal conductivity for thermal energy storage [Energy Conversion and Management]

The efficacy of cooling with phase change material for the treatment of exercise-induced muscle damage: pilot study [Journal of Sports Sciences]

Form-stable phase change material based on Na2CO3·10H2O-Na2HPO4·12H2O eutectic hydrated salt/expanded graphite oxide composite: The influence of chemical structures of expanded graphite oxide [Renewable Energy]

Structure and Thermal Performances of Paraffin/Diatomite Form-stable Phase Change Materials [Chinese Journal of Materials Research]

Research roundup: HDPE spheres; erythritol-based composites; shape-stabilized PCM sheets; graphite foam; more

Ben Welter - Wednesday, August 23, 2017

High density polyethylene spheres with PCM for domestic hot water applications: Water tank and laboratory scale study [Journal of Energy Storage]

Numerical Simulation and Optimization of the Melting Process of Phase Change Material inside Horizontal Annulus [Energies]

Evaluation and comparison of erythritol-based composites with addition of expanded graphite and carbon nanotubes [Applied Energy]

Investigation of thermo-fluidic performance of phase change material slurry and energy transport characteristics [Applied Energy]

Numerical investigation of heat transfer performance of a rotating latent heat thermal energy storage [Applied Energy]

Application of shape-stabilized phase-change material sheets as thermal energy storage to reduce heating load in Japanese climate [Building and Environment]

Graphite foam as interpenetrating matrices for phase change paraffin wax: A candidate composite for low temperature thermal energy storage [Solar Energy Materials and Solar Cells]

Alkali polyphosphates as new potential materials for thermal energy storage [Solar Energy]

Magnesium phosphate cements formulated with low grade magnesium oxide incorporating phase change materials for thermal energy storage [Construction and Building Materials]

Numerical and experimental investigation of an insulation layer with phase change materials (PCMs) [Energy and Buildings]

Research roundup: INPATH-TES Ph.D. program; waste-to-energy plants; EnergyPlus-based building model; more

Ben Welter - Thursday, June 29, 2017

INPATH-TES: Innovative pathways to PhD research in thermal energy storage [Sustainable and Renewable Energy Engineering]

Application of high temperature phase change materials for improved efficiency in waste-to-energy plants [Waste Management]

Experimental investigation and EnergyPlus-based model prediction of thermal behavior of building containing phase change material [Journal of Building Engineering]

Experimental Analysis of Graphite Dispersed Salt Hydrates based Phase Change Materials to Determine Enhancement in their Thermophysical Properties [pdf] [Journal of Chemical and Pharmaceutical Sciences]

Use of phase change materials during compressed air expansion for isothermal CAES plants [35th UIT Heat Transfer Conference]

Simulation of Melting Process of a Phase Change Material (PCM) using ANSYS (Fluent) [pdf] [International Research Journal of Engineering and Technology]

Cellulose/Paraffin Composite Fibers for Thermal Energy Storage and Temperature Regulation [IUMRS International Conference in Asia]

Enhanced Specific Heat Capacity of Binary Chloride Salt by Dissolving Magnesium for High-temperature Thermal Energy Storage and Transfer [Journal of Materials Chemistry A]

Research roundup: Capsule in shape of red blood cell; helical fin; graphene-enhanced enhanced myo-inositol; more

Ben Welter - Wednesday, March 29, 2017

Thermal performance analysis of a novel PCM capsule in red blood cell shape [Applied Thermal Engineering]

Experimental demonstration, modeling and analysis of a novel latent-heat thermal energy storage unit with a helical fin [International Journal of Heat and Mass Transfer]

Preparation, characterization and thermal properties of fatty acid eutectics/bentonite/expanded graphite composites as novel form–stable thermal energy storage materials [Solar Energy Materials and Solar Cells]

Parametric study and approximation of the exact analytical solution of the Stefan problem in a finite PCM layer in a steady periodic regime [International Communications in Heat and Mass Transfer]

Synthesis, characterization and applications of microencapsulated phase change materials in thermal energy storage [Energy and Buildings]

Graphene nanoplatelets enhanced myo-inositol for solar thermal energy storage [Thermal Science and Engineering Progress]

Research roundup: Fast charging with expanded graphite; rebar corrosion in PCM-enhanced concrete; hybrid cooling vest; more

Ben Welter - Tuesday, March 28, 2017

Fast charging of thermal energy storage systems enabled by phase change materials mixed with expanded graphite [International Journal of Heat and Mass Transfer]

Synthesis and characterization of a narrow size distribution nano phase change material emulsion for thermal energy storage [Solar Energy]

Analysis of the effects of use of thermal energy storage device (TESD) in solar air heater [Alexandria Engineering Journal]

Experiment and simulation of thermal management for a tube-shell Li-ion battery pack with composite phase change material [Applied Thermal Engineering]

Novel model for the prediction of SSLE temperatures and crystallization paths of any mixture containing palmitic, stearic, oleic, linoleic and linolenic acid [Thermochimica Acta]

A review on recent advancements in photovoltaic thermal techniques [Renewable and Sustainable Energy Reviews]

A comparative study on corrosion behavior of rebar in concrete with fatty acid additive as phase change material [Construction and Building Materials]

Novel phase change materials based on fatty acid eutectics and triallyl isocyanurate composites for thermal energy storage [Journal of Applied Polymer Science]

Optimal cooling intervention for construction workers in a hot and humid environment [Building and Environment]

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: 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]

Patent application: Container having a mixture of PCM and graphite powder

Ben Welter - Thursday, October 27, 2016

U.S. patent application 20160309932 (applicant Fraunhofer Society for the Promotion of Applied Research):

Fraunhofer patent drawing"A container may be provided, in particular a beverage container, comprising an inner container wall and an outer container wall, an intermediate space lying between the container walls, wherein the intermediate space is filled with a mixture that contains phase-change material and graphite powder, wherein the graphite powder is introduced into the phase-change material in such a way that the mixture has a pulpy consistency at a temperature at which the phase-change material is liquid. A method may be provided for producing a container that includes the following steps: A) providing an inner container wall and an outer container wall; B) applying a mixture of graphite powder and phase-change material to the inside of the outer container wall and/or the outside of the inner container wall; C) joining the outer container wall and the inner container wall."

http://www.freepatentsonline.com/20160309932.pdf

Research roundup: Polyol-polystyrene composites; effect of N-isopropylacrylamide; nano-PCMs for passive cooling; more

Ben Welter - Tuesday, April 12, 2016

Novel microstructured polyol–polystyrene composites for seasonal heat storage [Applied Energy]

Effect of N-isopropylacrylamide on the preparation and properties of microencapsulated phase change materials [Energy]

Nano-PCMs for enhanced energy storage and passive cooling applications [Applied Thermal Engineering]

Rheological and energy transport characteristics of a phase change material slurry [Energy]

Thermal Analysis and Modelling of Thermal Storage in Solar Water Heating Systems [International Journal of Sustainable and Green Energy]

Encapsulation of phase change materials by complex coacervation to improve thermal performances and flame retardant properties of the cotton fabrics [Fibers and Polymers]

Optimizing performance of a bank of chillers with thermal energy storage [Applied Energy]

Exergy analysis of an adiabatic compressed air energy storage system using a cascade of phase change materials [Energy]

Thermal properties improvement of Lithium nitrate/Graphite composite phase change materials [Applied Thermal Engineering]

Volumetric solar absorption in a channel with presence of phase change material in a carrier fluid [Applied Thermal Engineering]

PCM briefing: Qatar University working on polyolefin-based PCM; Pelican BioThermal introduces Credo Cargo

Ben Welter - Wednesday, February 10, 2016

Qatar University Centre for Advanced Materials is developing polyolefin-based phase change material to reduce energy consumption, carbon emissions and plastic waste. The research team is developing special PCM foams and compact composite sheets based on polyethylene, paraffin wax and graphite. 

Swiss away jersey by PumaPelican BioThermal has launched a new pallet shipper system, CrÄ“do Cargo. The reusable bulk shipper uses phase change material cooling panels to maintain temperature ranges +2C to +8C and +15C to +25C. 

The Swiss national soccer team will wear PCM-infused away uniforms at the European Championships 2016 in France. The jersey features Puma's ACTV Thermo-R technology. Strategically placed tape infused with microencapsulated phase change material absorbs excess heat and releases it back to the body when needed. The uniforms will be worn for the first time in an international friendly against the Republic of Ireland on March 25. Other national teams sporting the new kits are Austria, Czech Republic, Slovakia and Italy.

President Obama is vowing to push ahead with efforts to curtail greenhouse gas emissions after the U.S. Supreme Court put his Clean Power Plan on hold until legal challenges are resolved.