Phase Change Matters RSS

 

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.

RECENT POSTS

TAGS

ARCHIVE

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.

Research roundup: PCM board performance; thermosetting solid-solid PCM; nano-platelet composites; fire-resistant drywall; more

Ben Welter - Friday, February 05, 2016

Thermal analysis of Phase Change Material Board (PCMB) under weather conditions in the summer [Applied Thermal Engineering]

Thermosetting solid-solid phase change materials composed of poly(ethylene glycol)-based two components: flexible application for thermal energy storage [Chemical Engineering Journal]

Polyurethane/graphite nano-platelet composites for thermal energy storage [Renewable Energy]

Preparation of binary eutectic chloride/expanded graphite as high-temperature thermal energy storage materials [Solar Energy Materials and Solar Cells]

Experimental investigation of the fire resistance of multi-layer drywall systems incorporating Vacuum Insulation Panels and Phase Change Materials [Fire Safety Journal]

Fabrication and properties of microencapsulated n-octadecane with TiO2 shell as thermal energy storage materials [Solar Energy]

Synergistic enhancement of thermal conductivity for expanded graphite and carbon fiber in paraffin/EVA form-stable phase change materials [Solar Energy]

PCM briefing: Graphite foams may be key to CSP thermal storage; PCMs improving packout efficiencies in cold chain

Ben Welter - Thursday, February 04, 2016

South African researchers say graphite foams may be the key to capturing and storing thermal energy from solar farms, Materials Today reports.

"New phase change material is improving packout efficiencies with higher latent heat," UPS cold chain strategist Susan Li says in an interview with Contract Pharma. "However, cost is still an issue to further advance the application of such technology."

NASA is testing microencapsulated phase change material as a coating to dissipate heat generated during supersonic flight. In a four-year study at the Marshall Space Flight Center in Alabama, the coating proved to be unaffected by ultraviolet rays and produced no residue or side effects.

Research roundup: Graphene nanoplatelets and expanded graphite; natural convective heat transfer; freeze protection for crops; more

Ben Welter - Monday, February 01, 2016

Thermal performance enhancement of palmitic-stearic acid by adding graphene nanoplatelets and expanded graphite for thermal energy storage: A comparative study [Energy]

Experimental study on natural convective heat transfer of tube immersed in microencapsulated phase change material suspensions [Applied Thermal Engineering]

Phase change material’s (PCM) impacts on the energy performance and thermal comfort of buildings in a mild climate [Building and Environment]

On the Use of Encapsulated Phase Change Materials Pebbles and Pellets as Freeze Protection Method for Low-Stature Plants/Crops [Engineering in Agriculture, Environment and Food]

Research roundup: Enhancement of solid-solid PCMs; sodium trihydrate composites; smart macroencapsulated resin-wax composite; more

Ben Welter - Thursday, November 12, 2015

Numerical study on performance enhancement of solid–solid phase change materials by using multi-nanoparticles mixtures [Journal of Energy Storage]

Experimental investigations on using phase change material for performance improvement of storage-enhanced heat recovery room air-conditioner [Energy]

Solidification behavior and thermal conductivity of bulk sodium acetate trihydrate composites with thickening agents and graphite [Solar Energy Materials and Solar Cells]

Preparation and properties of β-cyclodextrin/4,4′-diphenylmethane diisocyanate/polyethylene glycol (β-CD/MDI/PEG) crosslinking copolymers as polymeric solid–solid phase change materials [Solar Energy Materials and Solar Cells]

Smart macroencapsulated resin/wax composite for energy conservation in the built environment [Journal of Thermoplastic Composite Materials]