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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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Technically speaking, PCM-infused lingerie line radiates an air of mystery

Ben Welter - Monday, February 13, 2017

Giapenta's beautiful new line of PCM-infused lingerie features soft, breathable mesh, delicate appliques and natural, moisture-wicking fabrics. As far as technical details, though, the brand’s founder is leaving much to the imagination.

Giapenta modelThe Florida startup, which launched a Kickstarter campaign last month to cover costs of its first production run, says the TempPro fabric used in the lingerie “proactively” pulls heat away to cool the body. Giapenta’s message to consumers:

“Just as you start to get warm, the phase changing materials in the fabric actively pull heat away from your body. Overheating and sweating are reduced. If you do start to get cold, stored heat is released back to you, when you need it the most.”

The company was founded by Kris Strouthopoulos, who managed Sleep Number mattress and bedding stores for 10 years. That’s where she became familiar with temperature-regulating fabrics and materials.

“Women especially would always come up to me to tell me how amazing and life changing the fabric was for them,” she said. “I always thought that if they were getting such an amazing benefit from this technology all night long, why not get the same effects during the day from their undergarments? So that is how we initially got into the lingerie industry and built a team dedicated to infusing technology and smart design solutions into garments to help improve the lives of others.”

TempPro fabric illustrationShe and her sister, Marketing VP Elena Strouthopoulos, have been working on the brand for two years. The Kickstarter campaign met its modest target of raising $25,000 in just one day, putting the company on a path to complete the production run in Canada by April and ship the first orders in May.

I contacted Kris Strouthopoulos to learn more about the TempPro fabric, which the company says is used throughout the line. What type of phase change material is used? What is its melt point? How is it encapsulated? She politely declined to answer any questions of a technical nature, saying such information is proprietary. Fair enough. We'll leave that to your imagination.

PCM briefing: California utility will buy up to 100 Ice Bears for residential use; Malouf unveils new graphite-PCM pillow

Ben Welter - Thursday, February 09, 2017

Ice Energy will join forces with the Southern California Public Power Authority to provide up to 100 Ice Bear 20 cooling units for residential use within utility's 12 member territories in 2017. Installations will begin in June. The Ice Bear 20 stores cooling energy during off-peak hours by freezing water in an insulated tank. During peak hours, the company says, the stored ice delivers up to four hours of cooling, reducing the typical peak load by 95 percent. The new deployment is designed to demonstrate the Ice Bear 20's grid value to utilities. The units will be installed in single-family homes chosen by Ice Energy based on site visits. Homes that need 4-, 5- or 6-ton air-conditioning systems replaced are the likely targets. The utilities pay for the Ice Bears; it's unclear at this point who will pay installation costs. If all 100 Ice Bear 20s are purchased, the total cost to the utilities will be $1.33 million (not including installation).

Malouf CarbonCool pillow• Bedding maker Malouf's new CarbonCool Plus OmniPhase pillow combines the temperature-regulation properties of graphite and microencapsulated phase change material. "At the molecular level," Furniture Today reports, "the material inside the capsules changes from a solid to a liquid when the temperature is high and vice versa when the temperature is low. This continuous cycle is designed keep the pillow surface between 87 and 91 degrees, which research shows is the ideal skin temperature range for deep sleep." The queen size shown here retails for $299.99.

• New from Absolute Reports: "United States Advanced Phase Change Materials (PCM) Market By Manufacturers, States, Type And Application, Forecast To 2022"

SPX Flow's new FLEX Series refrigerated air dryer uses phase change material to tightly regulate temperatures and reduce compressor cycling.

Prongo insulin bagPluss Technologies' PronGo bag, introduced last year for consumers to transport frozen and chilled food and beverages, is  now being promoted as a way to keep insulin at the right temperature for up to 10 hours. The 3-liter bag comes with two sets of PCM cooling packs. It's available on Amazon.in for about $52. In an interview with Express Pharma, company director Samit Jain talked about the Prongo and another new product, Celsure, a passive shipper designed to keep pharma products "at the right temperature for 96 hours and beyond at the tropical temperatures that countries like India, South East Asia and Africa have."

1414 Degrees, the Australian company that has developed a way to store electricity as thermal energy by heating and melting containers full of silicon, is now scaling up the technology and plans to launch the first commercial systems this year. Executive Chairman Kevin Moriarty said the company is waiting for AusIndustry, a division of Australia's Department of Industry, Innovation and Science, to sign off on the 10MWh project in February so manufacture can begin.

PCM briefing: New denim features phase change material; Sasol 'back on the expansion trail'

Ben Welter - Monday, February 06, 2017

• Thinking about attending BiobasedWorld 2017 in Cologne, Germany, this month? Sorry, the trade show was canceled a few months ago due to the industry's "challenging economic environment." A related show is on the horizon: Bio-Based Live Europe in Amsterdam, May 31-June 1. The focus will be on "Process Innovation and Technology" and "Sustainable Products." Speakers include Freek Snieders, managing director, Croda International; and Jean Luc Dubois, scientific director, Arkema.

Oak Ridge National Laboratory takes a look at how University of Michigan researchers used a Cray XK7 Titan supercomputer to study melting in two-dimensional systems. Deeper understanding of the process, Oak Ridge says, "could yield insights into surface interactions in materials important to technologies like solar panels, as well as into the mechanism behind three-dimensional melting." 

• The cold chain packaging class developed by Sonoco ThermoSafe’s ISC Labs will be offered at the Cold Chain GDP & Temperature Management Logistics Global Forum in San Diego in May. The all-day session on May 25 will cover the design, development and qualification of temperature-controlled packaging. The conference agenda is available for download.

Biznews.com reports that chemicals giant Sasol is "back on the expansion trail, seeking out suitable acquisitions."

• Among the new fabrics on display at the Munich Fabric Start trade show this week: Cordura denim combined with Schoeller phase change material. 

• The University of the West of England has installed two Monodraught Cool-Phase hybrid units in the university's Estates Management Office in Bristol. Monodraught says its PCM-equipped systems have been shown to "use up to 90% less energy than traditional a/c systems."  

• The 12th Conference on Advanced Building Skins, scheduled for Oct. 2-3 in Bern, Switzerland, has issued a call for papers. Possible topics include financial models, new products, advanced design and building performance. The deadline is Feb. 10. 

Pelican BioThermal has announced that its new passive pallet shipper system, CrÄ“do Cargo, is now available to rent or buy. The reusable bulk shipper uses phase change material cooling panels to maintain temperature ranges +2C to +8C and +15C to +25C. 

Research roundup: Encapsulated paraffin wax and sand nanoparticles; 1,6-hexanediol/lauric acid; more

Ben Welter - Thursday, January 26, 2017

New hybrid nanofluid containing encapsulated paraffin wax and sand nanoparticles in propylene glycol-water mixture: Potential heat transfer fluid for energy management [Energy Conversion and Management]

Thermal properties and stabilities of the eutectic mixture: 1,6-hexanediol/lauric acid as a phase change material for thermal energy storage [Applied Thermal Engineering]

Adaptability research on phase change materials based technologies in China [Renewable and Sustainable Energy Reviews]

Design of a Low cost Non Electrical Type Baby Incubator for Developing Country [pdf] [International Journal of Scientific & Engineering Research]

PCM briefing: Stanford energy hub wins AIA award; is that PCM atop a Japanese greenhouse?

Ben Welter - Friday, January 20, 2017

Stanford University's new Central Energy Facility, the heart of a campus-wide energy system, has won a 2017 Institute Honor Award, the American Institute of Architects' highest recognition for design excellence. A 2.5-million-gallon hot water tank in the courtyard showcases the energy plant’s mission.

Greenhouse in Yamaguchi Prefecture• A strawberry-cultivation system that stores excess solar heat in a tank filled with cobblestones reduced heating costs by 80 percent at a greenhouse in Japan's Yamaguchi Prefecture. "A mat-like heat-insulating material" – phase change material, perhaps? – atop the greenhouse, right, is rolled up during the day to let in sunlight.

A power plant under construction in Kiel, Germany, will be able to store more than 1,500 megawatt hours of heat in a 60-meter-high water tank, ensuring the supply of more than 70,000 district heating customers for up to eight hours. The gas-fired Stadtwerke Kiel will simultaneously generate electricity and heat through cogeneration.

• New from QYResearch: "Europe Bio-Based Phase Change Materials Market Report 2017" and "Global Bio-Based Phase Change Materials Market Professional Survey Report 2017."

• The Industrial Fabrics Association International has issued a call for presenters for the IFAI Advanced Textiles Conference, to be held Sept. 26-29 in New Orleans. The deadline for submitting a proposal is Feb. 5.

• In partnership with Technical University Hamburg Harburg and Hamburg Energie, Siemens AG is developing a thermal storage system that will convert excess wind energy to heat and store it in rock fill. A steam turbine will convert the heat energy back to electricity on demand. The full-size system will be able to store about 36 MWh of energy in a container filled with 2,000 cubic meters of rock.

• The global market for thermal energy storage is projected to reach a value of $1.8 billion by 2020, Transparency Market Research reports. Latent heat and thermochemical storage technologies are expected to grab market share from sensible heat technology, which is now the dominant technology in the market.

Pluss Advanced Technologies has an opening for a quality assurance manager at its facility in Bawal, India. The quality manager is responsible for overall development, implementation and maintenance of the quality management system for the company's polymer and PCM business units.

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: Heat storage system in diesel engine; integrating PCM in furniture; hybrid cooling vest; more

Ben Welter - Friday, November 18, 2016

Experimental study on heat storage system using phase-change material in a diesel engine [Energy]

Recycling Rhizopus oryzae resting cells as biocatalyst to prepare near eutectic palmitic-stearic acid mixtures from non-edible fat [Journal of Molecular Catalysis B: Enzymatic]

Dynamic thermal characteristics analysis of microencapsulated phase change suspensions flowing through rectangular mini-channels for thermal energy storage [Energy and Buildings]

Influence of internal thermal mass on the indoor thermal dynamics and integration of phase change materials in furniture for building energy storage: A review [Renewable and Sustainable Energy Reviews]

Experimental study of the thermal characteristics of microencapsulated phase change composite cylinders [Applied Thermal Engineering]

Experimental Investigation of Melting Behavior of PCM by Using Coil Heat Source inside Cylindrical Container  [Journal of Electrical Systems and Information Technology]

Simulation Study of Anomalous Thermal Properties of Molten Nitrate salt [Powder Technology]

Enhance heat transfer for phase-change materials in triplex tube heat exchanger with selected arrangements of fins [Applied Thermal Engineering]

Experiments on Thermal Performance of Erythritol/Expanded Graphite in a Direct Contact Thermal Energy Storage Container [Applied Thermal Engineering]

Hybrid cooling vest for cooling between exercise bouts in the heat: effects and practical considerations [Journal of Thermal Biology]

PCM briefing: va-Q-tec raises stake in polymer nanofoam company; Axiom installs system in Walmart store

Ben Welter - Tuesday, November 15, 2016

• PCM maker va-Q-tec AG is increasing its equity stake in SUMTEQ GmbH, a technology company that develops lightweight, durable polymer nanofoams for use as insulating material. 

• In tests conducted by San Diego Gas and Electric and ASWB Engineering, Viking Cold Solutions' PCM-based thermal energy storage system showed reductions in electricity consumption of 30 percent and 39 percent in two cold storage facilities in the San Diego area. Based on the results, SDG&E and ASWB recommended that California utilities include the technology in their Energy Efficiency and Demand Response incentive programs.

• The International Fabrics Association International has issued a call for presenters for its next trade show and expo. Possible topics include flame retardancy, moisture management, polymer innovations and thermal control. Submissions are due Feb. 9. The expo will be held Sept. 26-29, 2017, in New Orleans.

Greentech Media's Jason Deign takes a look at what energy insiders around the world are making of Donald Trump's victory.

Axiom Exergy is installing its "Refrigeration Battery" energy storage system at a San Diego Walmart store. Two of California's largest utilities are funding the demonstration project. The system stores water chilled at night, when electricity is cheapest, to take the load off condensers and compressors during the day.

• New from QYResearch: "Global Phase Change Materials Market Research Report 2016."

SpecialChem is offering a 90-minute webinar on the impact of a new U.S. law on intellectual property. "U.S. Trade Secrets and How they are Protected: Easy to Understand Guide" will be held at 10 a.m. EST on Dec. 14. The cost is $268 for three participants on a single connection.

PCM briefing: Croda earns EcoVadis Gold Status; case study on heat flux sensor use

Ben Welter - Friday, November 04, 2016

Croda, the U.K.-based specialty chemicals company whose product line includes biobased CrodaTherm phase change material, has earned EcoVadis Gold Status for the third year running, placing in the top 1 percent of all chemical companies evaluated. The designation is based on a company's environmental, labor, fair business and sustainable procurement practices. 

CIC Energigune is seeking candidates for a postdoctoral position in the thermal energy storage group for research focused on materials development and characterization. The research center, based in Spain's Basque Country, also has openings for a lab technician and a TES group leader. 

• Australia's National Solar Energy Centre is seeking a Ph.D. student to join a research team studying high-temperature solar thermal energy storage. Areas of research may include novel thermal processes and energy storage systems; process dynamic simulation and integration; and computational modeling of particulate flow.  

GreenTEG has posted a case study explaining how heat flux sensors can help construction planners better understand how phase change materials perform in building materials.

Dr. Barbara Pause, president of Textile Testing and Innovation LLC, talked about the potential for phase change materials in automotive applications at last month's Industrial Fabric Association International Expo in North Carolina. She presented data showing that PCM embedded in adhesives and fabrics can reduce the temperature inside a parked car from as high as 180º F down to under 120º F over a two-hour period.  

Cardinal Health Inc. will give a presentation on its award-winning packaging solutions at Pack Expo International in Chicago on Tuesday. The Reusable Packaging Association recently honored Cardinal for its innovative approach to ensuring the safe, efficient and sustainable delivery of refrigerated pharmaceuticals. In partnership with Sonoco ThermoSafe, Cardinal switched from water-based coolant gel packs within its reusable plastic totes to plant-based PureTemp phase change materials. The change helped Cardinal reduce product spoilage by 90 percent.

• New from Wise Guy Reports: "Global Eutectic PCMs Sales Market Report 2016," "Global Salt Hydrates Sales Market Report 2016," "Global Inorganic PCMs Sales Market Report 2016," "Global Non-Paraffin Compounds Sales Market Report 2016" and "Global Paraffin Compounds Sales Market Report 2016."

• On the agenda for the International District Cooling Conference in Dubai Nov. 13-15: Steve Benz of EVAPCO will talk about thermal energy storage types and best practices for optimizing chilled water dispatch. Henry Johnstone of GLHN Architects & Engineers will address the question of managing Delta T in buildings.

PCM briefing: Papers sought for 4 cold chain conferences; Momentive introduces hybrid polymer modifiers

Ben Welter - Wednesday, November 02, 2016

Pharma Logistics IQ is inviting temperature controlled logistics experts to submit papers four upcoming conferences: Temperature Controlled Logistics Europe, Cold Chain-GDP & Temperature Management Latin America, Cold Chain Canada and Pharma Cold Chain and Temperature Management Summit China. Contact Pharma IQ editor Chanice Henry at chanice.henry@iqpc.co.uk.

• The CEGA congress for technical building equipment experts, hosted by Recknagel and VDI, will be held Nov. 29-30 in Baden-Baden, Germany. Dr. Bernd Boiting of the University of Münster will give a lecture about thermal energy storage using phase change material. More than 50 lectures on topics such as heating, ventilation, air conditioning and building automation will be presented at the conference, which will be conducted in German.

Momentive Performance Materials has introduced ceramic powders designed to improve the thermal conductivity of plastics. The company, based in Waterford, N.Y., says its CoolFX hybrid polymer modifiers can be more cost-effective than traditional boron nitride fillers.

• In a piece in Apparel magazine, Alexium International CEO Nicholas Clark weighs in on "What Flame Retardant Apparel Manufacturers Need to Know About the Lautenberg Act."

• The European Commission has launched a major review of REACH, the European Union’s main chemical safety law, publishing a 43-page questionnaire and asking for public feedback on its strengths and weaknesses.

• In an interview in Minnesota Business, Pelican BioThermal's Adam Tetz talks about the expansion of the company's manufacturing capacity in Plymouth. The expansion will support production of single-use temperature-controlled shippers in the United States.

• New from QYResearch: "Global Paraffin Compounds Sales Market Report 2016"

A CALMAC thermal energy storage system is being installed at Pueblo's historic county courthouse in Colorado. The system creates and stores ice at night and then uses it to cool buildings during the day.

ETH Zurich is looking for a licensing or collaboration partner to work on a high-temperature thermal energy storage system that provides active control of the heat-transfer fluid outflow temperature. Possible applications include concentrated solar power plants and advanced adiabatic compressed air energy storage.

• Imagine this: Your technology on display at the ARPA-E Energy Innovation Summit early next year. The Technology Showcase is an opportunity to get your innovative energy technology in front of investors and researchers ready to collaborate. There is no fee to apply; the application deadline is Dec. 16.

ARPA-E will hold a workshop on “Lower Grade Waste Heat Recovery” Dec. 13-14 in the San Francisco area. The workshop will convene experts in waste heat recovery, materials development and novel solid-state materials to identify innovative research paths for the development of lower grade (below 400° C) waste heat recovery systems.

ARPA-E will hold a workshop on “Fuel Cell and Heat Engine Hybrid CHP Systems” on Jan. 26-27, 2017, in the Washington, D.C. area. The workshop will convene experts in fuel cells, heat engines, materials and advanced manufacturing technologies to identify related technological solutions that would help to enable the introduction of highly efficient yet cost-effective commercial-scale combined heat and power systems.