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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.

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Research roundup: Form-stable PCM; polyethylene glycol/quartz composites; fuzzy clustering; more

Ben Welter - Tuesday, June 18, 2019

From Renewable Energy:

A N-octadecane/hierarchically Porous TiO2 Form-Stable PCM for Thermal Energy Storage

From International Journal of Energy Research:

Hybrid solar parabolic dish power plant and high‐temperature phase change material energy storage system

From Journal of Applied Polymer Science:

Thermal and dynamic mechanical properties of polyethylene glycol/quartz composites for phase change materials

From Journal of Cleaner Production:

Using fuzzy clustering and weighted cumulative probability distribution techniques for optimal design of phase change material thermal energy storage

From Construction and Building Materials:

Thermoregulation effect analysis of microencapsulated phase change thermoregulation agent for asphalt pavement

From Applied Energy:

Residential cooling using separated and coupled precooling and thermal energy storage strategies

Patent application: Phase change material for storing thermal energy

Ben Welter - Friday, June 14, 2019

U.S. patent application 20190177224 (applicant Université de Cergy-Pontoise, Cergy, France):

"A method for manufacturing a solid-solid organic phase-change material made of polyurethane, said method comprising: a single step (i) of synthesis by mixing and reacting a liquid polyethylene glycol, a crosslinking agent, and a liquid polyisocyanate, combined by mechanical agitation at a first controlled temperature, in an enclosure in order to obtain the liquid polyurethane, a step (ii) of curing the liquid polyurethane at a second controlled temperature in order to solidify the polyurethane, the synthesis step (i) being carried out in the absence of a solvent."

http://www.freepatentsonline.com/20190177224.pdf

8 Viking Cold Solutions systems installed in Massachusetts

Ben Welter - Friday, June 14, 2019

Viking Cold Solutions has completed the installation of eight thermal energy storage systems as part of a utility-backed demand management program in Massachusetts. The Houston company says its PCM-based system, designed for use in cold storage facilities,  stores enough energy to cycle off refrigeration for up to 13 hours per day and reduce energy consumption by more than 25 percent. 

https://www.vikingcold.com/news/release-viking-cold-solutions-installs-1-3-mw-of-thermal-energy-storage-in-industrial-cold-storage-facilities-as-part-of-a-massachusetts-utility-demand-management-program/

PCM briefing: Building Skins conference agenda; tough words for CALMAC and Axiom Exergy

Ben Welter - Saturday, May 25, 2019

• The agenda is set for the 14th International Conference on Advanced Building Skins, to be held Oct. 28-29 in Bern, Switzerland. The Japanese architect and Pritzker laureate Shigeru Ban will be the keynote speaker. Among the more than 150 speakers is Thomas Friedrich of Innogration GmbH, Germany, who will discuss "collection of thermal energy from the façade" and "decentralized PCM storage elements for saving thermal energy." The registration fee is 680 euros and includes the conference documentation as well as meals during both days. Participants who register by May 31 will receive a 20 percent discount.

Mike HopkinsIn a LinkedIn post, former Ice Energy CEO Mike Hopkins shared his take on two of the California company's competitors in distributed thermal energy storage. "Look at @CALMAC, a Portfolio of Trane - been in our industry forever, good product, but haven't been able to secure utility deals because their large bespoke systems make it too risky to commit to MWs in a location on a schedule," wrote Hopkins, who is now CEO at Bakken Midstream. "Relative newcomer [Axiom Exergy] came to market with their #refrigeration #battery. Good concept but not plug and play. Not surprising, they seem to have recast themselves as a #cloud based power management company."

• Speaking of CALMAC: CEO Mark McCracken will speak on "some of the myths surrounding ice-based TES" at an ASHRAE technical seminar on thermal energy storage in building design in Hong Kong June 13. 

FedEx Express has launched a temperature-controlled shipping solution in Japan, Korea and Singapore. The company says its Medpak VIºC packaging, first introduced in Europe, provides 96-hour temperature stability. The reusable thermal packaging features vacuum insulated panels and phase change material validated to International Safe Transit Association 7D standards.

CIC energiGUNE, a research center in Spain's Basque Country, has an opening for a researcher in its thermal energy storage area. The research will focus on the storage of heat through reversible chemical reactions "in a range of temperature few explored so far (120 - 250 °C)." The application deadline is Sept. 11, 2019.   

Barbara Pause of Textile Testing & Innovation will be among the speakers at this year's Advances in Thermal Management conference, to be held Aug. 7-8 in Denver, Colo. Her topic: "Measuring and Modeling the Thermal Performance of Products Equipped with Phase Change Materials." 

• Thermal energy storage startup NET Energy of Chicago is among 10 finalists for the University of Chicago’s 19th annual Edward L. Kaplan New Venture Challenge. Winners will be announced next week, with the top companies sharing $250,000 in cash, along with $250,000 worth of office space and professional services from program sponsors. 

Research roundup: Night ventilation study; residential ice storage; fly ash and slag cement slurry; more

Ben Welter - Friday, May 24, 2019

From Building and Environment:

A parametric study of phase change material behaviour when used with night ventilation in different climatic zones

From Energy and Buildings:

Development and Evaluation of a Generalized Rule-Based Control Strategy for Residential Ice Storage Systems
Characterization of potassium carbonate salt hydrate for thermochemical energy storage in buildings

From International Journal of Energy Research:

Fly ash and slag cement slurry containing microencapsulated phase change materials

From Applied Energy:

Thermal response of annuli filled with metal foam for thermal energy storage: An experimental study
A scalable environmental thermal energy harvester based on solid/liquid phase-change materials

From International Journal of Hydrogen Energy:

Thermal management of metal hydride hydrogen storage reservoir using phase change materials

From Macromolecular Research:

Multiple Energy Harvesting Based on Reversed Temperature Difference Between Graphene Aerogel Filled Phase Change Materials

From Solar Energy:

Experimental studies on the effect of using phase change material in a salinity-gradient solar pond under a solar simulator

From Chemical Engineering Journal:

Thermal enhancement and shape stabilization of a phase-change energy-storage material via copper nanowire aerogel

From U.S. Office of Scientific and Technical Information:

Prototype Testing of Encapsulated Phase Change Material Thermal Energy Storage (EPCM-TES) for Concentrated Solar Power

From E3S Web of Conferences:

A PCM based cooling system for office buildings: a state of the art review

From Solar Energy Materials and Solar Cells:

Design of MtNS/SA microencapsulated phase change materials for enhancement of thermal energy storage performances: Effect of shell thickness

From Journal of Molecular Liquids:

Investigating the effects of hybrid nanoparticles on solid-liquid phase change process in a Y-shaped fin-assisted LHTESS by means of FEM

From Renewable and Sustainable Energy Reviews:

A review of microencapsulated and composite phase change materials: Alteration of strength and thermal properties of cement-based materials

Research roundup: High-conductivity nanomaterials; paper board packaging; battery thermal management; more

Ben Welter - Thursday, May 16, 2019

From Heat and Mass Transfer:

Experimental and numerical analysis of composite latent heat storage in cooling systems for power electronics

From Journal of Sol-Gel Science and Technology:

A robust, flexible superhydrophobic sheet fabricated by in situ growth of micro-nano-SiO2 particles from cured silicone rubber

From Journal of Thermal Analysis and Calorimetry:

High-conductivity nanomaterials for enhancing thermal performance of latent heat thermal energy storage systems

From Building Simulation:

Optimization and sensitivity analysis of design parameters for a ventilation system using phase change materials

From Journal of Packaging Technology and Research:

Thermal Analysis of Paper Board Packaging with Phase Change Material: A Numerical Study

From Energy Storage:

Thermal performance of battery thermal management system using composite matrix coupled with mini‐channel

From Phase Transitions:

A study on preparation and properties of carbon materials/myristic acid composite phase change thermal energy storage materials

From ACS Applied Materials & Interfaces:

Melamine Foam Supported Form-stable Phase Change Materials with Simultaneous Thermal Energy Storage and Shape Memory Property for Thermal Management of Electronic Devices

From International Conference on Thermal Engineering:

Performance Enhancement of Unitary and Packaged Air Conditioners With Phase Change Material
Performance Comparison of Different Phase Change Materials For Solar Cooking During off Sun Sunshine Hours
A Review on Enhancement of Thermophysical Properties of Paraffin Wax PCM With Nanomaterials
Nano-Enhanced PCMs for Low Temperature Thermal Energy Storage Systems and Passive Conditioning Applications

From Chemistry Select:

Designing Coconut Oil Encapsulated Poly(stearyl methacrylate‐co‐hydroxylethyl metacrylate) Based Microcapsule for Phase Change Materials

From Evolution in Polymer Technology Journal:

Enhancement of Thermo-Regulating Textile Materials Using Phase Change Material

From Materials Research Express:

Improved thermal characteristics of Ag nanoparticles dispersed myristic acid as composite for low temperature thermal energy storage

From Applied Energy:

On the performance of ground coupled seasonal thermal energy storage for heating and cooling: A Canadian context

From Solar Energy Materials and Solar Cells:

Thermal stability enhancement of d-mannitol for latent heat storage applications

Research roundup: Zinc oxide coating; TEG-PCM power enhancement; graphen-oxide aerogel beads; more

Ben Welter - Friday, May 10, 2019

From Advanced Materials Interfaces:

Doubly Coated, Organic–Inorganic Paraffin Phase Change Materials: Zinc Oxide Coating of Hermetically Encapsulated Paraffins

From Applied Energy:

Efficiency analysis and experimental validation of the ocean thermal energy conversion with phase change material for underwater vehicle
A numerical and experimental analysis of an integrated TEG-PCM power enhancement system for photovoltaic cells
Molten salt selection methodology for medium temperature liquid air energy storage application

From Applied Energy Materials:

Graphene-Oxide Aerogel Beads Filled with Phase Change Material for Latent Heat Storage and Release

From Journal of Wuhan University of Technology:

Effect of Modified Vermiculite on the Interface of a Capric Acid-expanded Vermiculite Composite Phase Change Material with Phase Transition Kinetics

From Journal of Molecular Liquids:

Numerical simulation of the melting process of nanostructured based colloidal suspensions phase change materials including the effect of the transport of the particles

From Fibers and Polymers:

Encapsulated Phase Change Material Embedded by Graphene Powders for Smart and Flexible Thermal Response

From Applied Thermal Engineering:

Influence of orientation on thermal performance of shell and tube latent heat storage unit

From Journal of Energy Storage:

Development and validation of the numerical model of an innovative PCM based thermal storage system

From 2nd International Conference on Power, Energy and Environment:

Feasibility Study of the Application of a Latent Heat Storage in a Solar Dryer for Drying Green Chili

From Solar Energy:

Tetradecyl oxalate and octadecyl oxalate as novel phase change materials for thermal energy storage
An analytical and comparative study of the charging and discharging processes in a latent heat thermal storage tank for solar water heater system
Effect of alkaline pH on formation of lauric acid/SiO2 nanocapsules via sol-gel process for solar energy storage

From Journal of Applied Polymer Science:

Preparation and characterization of paraffin microcapsules for energy‐saving applications

From Energy:

Flexible heatsink based on a phase-change material for a wearable thermoelectric generator

From Journal of Nanoscience and Nanotechnology:

Superior Form-Stable Phase Change Material Made with Graphene-Connected Carbon Nanofibers and Fatty Acid Eutectics

From Construction and Building Materials:

Thermal and rheological characterization of bitumen modified with microencapsulated phase change materials

From Thermochimica Acta:

Development of spherical α-Al2O3-based composite phase change materials (PCMs) and its utilization in thermal storage building materials

From Journal of Power Sources:

Thermophysical properties of trimethylolethane (TME) hydrate as phase change material for cooling lithium-ion battery in electric vehicle

From Solar Energy Materials and Solar Cells:

Applications of cascaded phase change materials in solar water collector storage tanks: A review
Thermal conductivity enhancement of hydrated salt phase change materials employing copper foam as the supporting material

Research roundup: Spherical encapsulation; thermal therapy respirator; nanoporous composite; PCM effect on cement; more

Ben Welter - Friday, May 03, 2019

From Journal of Energy Storage:

Performance comparison of four spherically encapsulated phase change materials for medium temperature domestic applications

From International Journal of Thermal Sciences:

Exploration of a thermal therapy respirator by introducing a composite phase change block into a commercial mask

From Renewable and Sustainable Energy Reviews:

Review on nanoporous composite phase change materials: Fabrication, characterization, enhancement and molecular simulation

From Sci:

The Effect of Phase Change Materials on the Physical, Thermal and Mechanical Properties of Cement 

From Applied Energy:

High energy-density and power-density thermal storage prototype with hydrated salt for hot water and space heating

From Journal of Thermal Science and Engineering Applications:

Thermal Cycling of Calcium Chloride Hexahydrate With Strontium Chloride as a Phase Change Material for Latent Heat Thermal Energy Storage Applications in a Nondifferential Scanning Calorimeter Set-Up
Numerical Investigation of Scheffler Concentrator Receiver for Steam Generation Using Phase Change Material

From IntechOpen:

Solar Thermal Energy Storage Using Paraffins as Phase Change Materials for Air Conditioning in the Built Environment

From Reactive and Functional Polymers:

Design and fabrication of pH-responsive microencapsulated phase change materials for multipurpose applications

From Advances in Fluid and Thermal Engineering:

Experimental Investigation on a Solar Thermal Energy Packed Bed Sensible Heat Storage Combined with Latent Heat Storage

From Bulletin of Materials Science:

Development of an acetanilide/benzoic acid eutectic phase change material based thermal energy storage unit for a passive water heating system

From International Journal of Heat and Mass Transfer:

Solidification performance of a latent heat storage unit with innovative longitudinal triangular fins

PCM briefing: Ice Energy signs distribution deal with Fuji Bridex; Pluss food bag now available in 13 states across India

Ben Welter - Friday, May 03, 2019

Ice Energy of Santa Barbara, Calif., has signed a distribution agreement with Fuji Bridex Pte Ltd. Under the agreement, Fuji Bridex will market, install and service Ice Energy’s commercial and residential ice-based thermal energy systems across Singapore, Japan, Australia and Southeast Asia. 

PronGO food bagPluss Advanced Technologies of Gurgaon, India, announced on LinkedIn this week that its PronGO insulated food bag is now available in 13 states across India and has "moved over 150 metric tons of #frozen and #chilled foods safely every month." The bag, right, uses PCM cooling pouches to keep perishable foods cool for up to eight hours and frozen foods frozen for up to five hours. 

1414 Degrees of Australia fired up the burners for the first time at its gas thermal energy storage system at the Glenelg Wastewater Treatment Plant in Adelaide this week. The system will enable South Australia Water to time-shift the use of its biogas to produce electricity and heat on demand, rather than use the biogas as it is generated. 

• Registration is open for the 5th International Conference on Industrial Waste Heat Valorisation May 21-22 in Kortrijk, Belgium. Among the topics: "Thermal storage technologies for medium and high temperatures," "Thermal (heat and cold) storage in industrial processes," "Thermal storage in P2H2P (Power to Heat to Power)" and "Increase flexibility of your energy system by adding thermal storage."

Alexium International Group Ltd. this week announced that it has entered into a supply agreement with an unnamed "multi-billion dollar North American manufacturer of mattresses." Alexium says the agreement makes it "the preferred supplier of phase change material (PCM) products for textile applications to its bedding products with the intent to form a strategic partnership." 

Brooklyn Bedding's new Aurora hybrid mattress features PCM "gel beads" that melt and solidify as needed to maintain a comfortable temperature. A reviewer for the Stamford Advocate gives the mattress high marks: "While I admittedly didn't take a thermometer to bed with me, I can say that this technology isn't marketing fluff — it actually worked for me. I never overheated, and neither did my partner who tends to sleep much hotter than I do."

MIT researchers have developed thin polymer films that conduct heat better than ceramics and many metals, including steel. “We think this result is a step to stimulate the field,” says Gang Chen, the Carl Richard Soderberg Professor of Power Engineering at MIT, and a senior co-author on the paper. “Our bigger vision is, these properties of polymers can create new applications and perhaps new industries, and may replace metals as heat exchangers.” 

Matthias WuttigMatthias Wuttig, a professor at RWTH Aachen University, was honored by the Materials Research Society as a 2019 Fellow for making "path-breaking contributions to the advancement of phase-change materials, including unraveling their unique bonding mechanism, unconventional transport properties and unusual kinetics." The society, founded in 1973, has more 14,500 members who are material experts from industry, academia and national labs. 

• Posted by Warmilu founder Grace Hsia on LinkedIn this week: "So honored Doctors Without Borders is piloting the Warmilu infant warming incubator blankets in Bangladesh. Thank you again to the whole Doctors Without Borders team and the Warmilu team stepping up to support infant healthcare initiatives. It was a great honor to be an abstract presenter at Doctors Without Borders MSF 2019 International Paediatric Days! We just saw the abstract published in ResearchGate and two of my personal + career dreams have finally come true: working with Doctors Without Borders and being published! Huge thank you to the whole MSF Scientific Committee and to Dr. Nadia Lafferty for your words of wisdom and amazing insights." Warmilu's IncuBlanket uses packs filled with sodium acetate trihydrate to keep infants warm for up to five hours.

Research roundup: Surface functionalization of composite PCM; EnergyPlus optimization; direct expansion solar heat pump; more

Ben Welter - Friday, April 26, 2019

From Applied Surface Science:

Effects of surface functionalization on thermal and mechanical properties of graphene/polyethylene glycol composite phase change materials

From Applied Energy:

Facile flexible reversible thermochromic membranes based on micro/nanoencapsulated phase change materials for wearable temperature sensor
Shape-remodeled macrocapsule of phase change materials for thermal energy storage and thermal management
Investigation on the thermal performance of a high temperature packed bed thermal energy storage system containing carbonate salt based composite phase change materials
Toward a new method for the design of combined sensible/latent thermal-energy storage using non-dimensional analysis
Strategic control and cost optimization of thermal energy storage in buildings using EnergyPlus
Adaptive measures for mitigating urban heat islands: The potential of thermochromic materials to control roofing energy balance

From Solar Energy Materials and Solar Cells:

Poly(styrene-co-divinylbenzene-co-acrylamide)/n-octadecane microencapsulated phase change materials for thermal energy storage

From Renewable and Sustainable Energy Reviews:

Recent advances in direct expansion solar assisted heat pump systems: A review
Review on nanoporous composite phase change materials: Fabrication, characterization, enhancement and molecular simulation

From Energy and Buildings:

Experimental Testing of Phase Change Materials in a Warm-Summer Humid Continental Climate

From International Journal of Energy Research:

Development of pentadecane/diatomite and pentadecane/sepiolite nanocomposites fabricated by different compounding methods for thermal energy storage

From Applied Thermal Engineering:

Heat transfer performance of graphene nano-platelets laden micro-encapsulated PCM with polymer shell for thermal energy storage based heat sink

From Journal of Applied Polymer Science:

Investigations on thermal properties of microencapsulated phase‐change materials with different acrylate‐based copolymer shells as thermal insulation materials

From Solar Energy:

Experimental investigation on the impact of thermal energy storage on the solar still performance coupled with PV module via new integration

From Thermochimica Acta:

Nanoencapsulated phase change material with polydopamine-SiO2 hybrid shell for tough thermo-regulating rigid polyurethane foam

From International Journal of Heat and Mass Transfer:

Optimization of the detailed factors in a phase-change-material module for battery thermal management

From Journal of Traffic and Transportation Engineering :

A review on the best practices in concrete pavement design and materials in wet-freeze climates similar to Michigan

From Case Studies in Thermal Engineering:

Study of a passive solar air heater using palm oil and paraffin as storage media

From Acta Microscopica:

Preparation of Graphene Hybrid Material and Thermal Properties of Polymer Composites