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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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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: 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

PCM briefing: Cold chain veteran joins Phase Change Energy Solutions; Outlast showcases new nylon filament yarn

Ben Welter - Friday, May 10, 2019

Bruce TruesdaleBruce Truesdale has joined Phase Change Energy Solutions of Asheboro, N.C., as director of business development - cold chain. He was formerly senior supply chain consultant at Verta Life Sciences and director of health care at Protek Pharma Worldwide. He declined an interview request, but his new job title suggests that PCES, whose product line now focuses on HVAC, building and thermal energy storage, has an interest in the temperature-controlled packaging market. Earlier this year, PCES announced an investment by Pegasus Capital Advisors, Emerald Technology Ventures and Third Prime, an early-stage venture fund and prior investor. The company said it would use the proceeds to fund the continued development of its thermal storage products and expand its operations globally.

Chalmers University of Technology of Sweden has an opening for a postdoctoral researcher in thermal energy storage for building applications. The research group Building Physics is working "to find out how novel TES with phase change materials (PCM) could complement the existing district heating and cooling networks and co-operate with other peak shaving techniques (water accumulator tanks, ground heat storage pumps, etc.) through smart thermal grids." The application deadline is June 9.

Outlast will showcase its new nylon filament yarn at the Techtextil trade show in Frankfurt, Germany, next week. "The PCMs optimized for this specific application," Outlast says, "are included directly inside the polyamide fibers." Potential applications include next-to-skin products such as undergarments, shapewear, sportswear and hosiery. The company says it now sources the majority of PCMs used in its products from renewable instead of synthetic raw materials.

PCM coolerA PCM coating designed to absorb heat from rockets is among the dozens of NASA spinoffs listed in the latest issue of Spinoff, an annual publication that has been documenting space agency spinoffs since 1976. In the early 2000s, Raj Kaul, a materials scientist at Marshall Space Flight Center, began researching a way to use PCM to keep the outside of spacecraft at a safe temperature. An entrepreneur eventually snapped up the patent for the coating Kaul developed and is working on a number of products based on the technology, including aircraft paint, pipe heat traps and an iceless cooler, shown at right. 

• The U.S. Department of Energy this week announced $89 million in funding for "innovative, advanced manufacturing research and development projects." "Innovations for the Manufacture of Advanced Materials," one of three areas to receive funding, includes phase change storage materials for heating and cooling applications. The department anticipates making up to 55 awards for up to three years. Concept papers are due on June 20.

PCM briefing: $33M in funding for CSP thermal storage research; Walero undergarment put to the test in race simulator

Ben Welter - Friday, March 29, 2019

• The U.S. Department of Energy has announced $33 million in research funding to advance technologies that work toward achieving the department's 2030 cost target of 5 cents per kilowatt-hour for CSP-generated electricity with at least 12 hours of thermal energy storage. "This research," DOE writes, "includes new materials and technologies that significantly reduce the cost of manufacturing, enable new energy storage technologies, and develop solutions that enable a solar field to operate autonomously without any human input."

Jack MitchellWalero racewear, which uses Outlast phase change technology to regulate temperature in race and rally drivers, has been put to the test on reigning British GT4 champion Jack Mitchell in a temperature-controlled race simulator. The tests were directed by racing performance coach Dean Fouache. On the first day, Mitchell, right, wore standard Nomex underwear; on the second day, he wore Walero underwear. Three measurements were recorded every five minutes during the hourlong tests: body temperature, heart rate and weight loss. In all three areas, Walero showed measurable advantages over the Nomex. "Jack sweated around 40 percent less in the Walero underwear and his average heart rate was eight beats less over the course of the hour," Fouache told Autosport magazine. "So, all in all, relatively conclusive results - even though it is a small comparison test."

• New this month from Central West Publishing in Australia: "Phase Change Materials," edited by Vikas Mittal, an associate professor of chemical engineering at the Petroleum Institute in Abu Dhabi.

• The International Conference on Innovative Applied Energy in the United Kingdom earlier this month featured a number of experiments with phase change materials, including Auburn University's development of micro-encapsulated phase change materials that can be combined with many different media. Other PCM research included a bio-composite made with hemp lime concrete and a novel utilization of fly ash to encapsulate phase change materials.

James Joule• The 200th anniversary of the birth of physicist James Prescott Joule will be commemorated with the unveiling of a plaque in Sale, United Kingdom, in April. The English physicist and mathematician, who gave his name to the unit of energy, was born on Dec. 24, 1818, in Salford. He died in Sale in 1889.

• The deadline for submitting manuscripts for "Phase Change Materials of Buildings," a special issue of the journal Buildings, is Sunday, March 31. Dr. Morshed Alam of Australia's Swinburne University of Technology is the guest editor.

PCM briefing: Sonoco ThermoSafe partners with Cargolux; Axiom Exergy partners with Leap

Ben Welter - Friday, March 22, 2019

Amrit RobbinsAxiom Exergy has announced a partnership with Leap, a technology company that serves as an aggregator of flexible power loads in California. Axiom says the arrangement will unlock grid services revenue for its customers, including three Whole Foods Market facilities in Northern California.

Axiom's "Refrigeration Battery" system is designed to reduce a supermarket's peak power use by up to 40 percent and provide backup cooling during power outages. It uses the excess capacity of existing refrigeration systems to "store cooling" at night by freezing tanks of salt water.  

"Axiom Exergy is excited to announce that Whole Foods has connected three of their buildings to our platform, which will serve as our first Virtual Power Plant," Axiom CEO Amrit Robbins wrote in a LinkedIn post Friday. "Axiom’s platform will intelligently manage 340 kW of dispatchable load across these facilities in order to generate more value for Whole Foods and to help stabilize California’s electricity grid."

Sonoco ThermoSafe has announced a global partnership agreement with Cargolux for the leasing of the PharmaPort 360 temperature-controlled bulk shipping container. The agreement enables pharmaceutical shippers to lease PharmaPort 360 containers directly from the all-cargo airline based in Luxembourg.

• On LinkedIn this week, Ice Energy posted an update on its 5 MW contract with Riverside Public Utilities in California: "We are working to install 9 Ice Bear thermal #energystorage batteries and 13 rooftop units with Inland Mechanical Services Inc. at a car dealership in Riverside."

• A high-temperature thermal energy storage system inaugurated in Denmark this week stores heat in stones. The test system uses surplus wind power to generate hot air, which heats up small stones in an insulated container to 600 degrees. The stored heat is used to generate electricity when the wind doesn't blow. The system was developed by the energy company Seas-NVE, in collaboration with DTU Energy, Aarhus University Geoscience, Danish Energy, Energinet.dk and Rockwool.

Alexium International CEO Bob Brookins was among the presenters at the International Conference on Textile Coating and Laminating in Berlin earlier this month. His topic: "Advanced applications of phase change materials."

• The German Aerospace Center (DLR) is investigating whether Germany’s coal plants can be refitted to serve as thermal energy storage sites. "The research body, which has a track record in concentrated solar power (CSP) development, is planning a pilot that will involve ripping out the boiler from an old coal plant and replacing it with a molten salt thermal storage tank that will be heated using excess renewable energy," Greentech Media reports. "If the concept works, then advocates say it could help safeguard coal generation jobs while giving Germany tens of gigawatts of storage capacity for renewable energy load-shifting on the German grid." DLR says it is preparing a commercial-scale pilot in association with an unnamed German utility.

PCM briefing: Energy Storage Europe includes sessions on thermal storage; C-Therm offers webinar on thermal performance of textiles

Ben Welter - Monday, March 04, 2019

• The Energy Storage Europe conference and trade fair, set for March 12-14 in Dusseldorf, Germany, includes a number of sessions on thermal energy storage: "Heat Storage - an essential contribution to energy transition," Oliver Baudson, TSK Flagsol Engineering GmbH; "Advanced Thermal Energy Storage Concepts," Dr. Robert Pitz-Paal, DLR Institute of Solar Research; "High Temperature Storage," Doron Brenmiller, Brenmiller Energy; "Material and Component Development for Thermal Energy Storage," Christoph Rathgeber, ZAE Bayern; and "Thermal Energy Storage for Cost-Effective Energy Management & CO2 Mitigation," Dr. Dan Bauer, German Aerospace Center - DLR e.V.

• The deadline for submitting paper proposals for next fall's Advanced Building Skins conference in Bern, Switzerland, is March 10. The list of topics includes thermal performance of phase change materials.

• Thermal battery maker Sunamp Ltd.'s collaboration with the University of Edinburgh’s School of Chemistry won the "Powerful Partnership" award at the Scottish Knowledge Exchange Awards 2019 last month. The organizations began work on the development of new phase change materials in 2010. 

• Croda International Plc has been recognized for its commitment to "a deforestation-free supply chain." Croda earned an A- in that category in CDP's climate change report for 2018, up from a B the previous year. The specialty chemical company says it has a special focus on palm oil and is committed to supplying RSPO-certified palm oil derivatives. 

• Thermal instrumentation maker C-Therm Technologies Ltd. is hosting a free webinar this week, "Quantifying Thermal Performance of Textiles (Warm Feel / Cool Touch)." The webinar, aimed at "anyone working in the product performance testing of textiles and fabrics where temperature regulation is an important function," will be held at 1 p.m. EST Wednesday.

Need a PCM coating on that coat? Ohio company has a solution

Ben Welter - Friday, March 01, 2019

Therma-SprayMCMENT Inc., an Ohio company that makes a PCM spray designed for use by consumers, launched a new website last month, teamapini.com, to market the product.

"We have been working on the Team Apini Therma-Spray product for a couple of years to give consumers a way to apply PCM technology to the clothing, bedding or other textile products they may already own," said Monte Magill, the company's senior vice president for PCM technologies. The coating is designed to absorb and release thermal energy to enhance thermal comfort.

"It is a water-based formulation containing microencapsulated PCMs and a heat curable binder material to affix the microPCMs to the various textile substrates," said Magill, who has worked in the PCM industry since the mid-1990s. "We do the final packaging in house but have the microPCMs and the binder formulation contract manufactured."

Therma-Spray-treated socks are also available on the site. The company has been selling Infinite R PCM products for the building and construction industry on its main site, mcmentinc.com, since 2016.

Magill says more retail products are in the pipeline: "Look for Team Apini thermal underwear, henleys, pillow cases and sheeting, a bunzy protector (seat cushion thermal protector for home, auto, camping, stadium, etc.), heating and cooling packs (for work, first responder and dietary applications) as well as an equestrian line we are working on now for both horse and rider (dressage focus)."

PCM briefing: PureTemp joins RSPO; Reda's new PCM fabric on display in Milan

Ben Welter - Monday, February 18, 2019

PureTemp LLC has joined the Roundtable for Sustainable Palm Oil as an associate member. The nonprofit organization, which has more than 4,000 members worldwide, promotes the growth and use of sustainable oil palm products. In November, RSPO adopted stricter standards for certified sustainable palm oil, including a total ban on deforestation by its members.

Reda Group's new Active Phase temperature-control fabric was on display at the Milan fabric trade show earlier this month. The material uses phase change material to keep body temperature constant when ambient temperature fluctuates. Reda says the material features enhanced breathability and softness and is "easy to clean, even in water."

University of Maryland fabric•  University of Maryland researchers have created a temperature-control fabric that does not rely on phase change material. The fabric changes its insulating properties in response to the environment. In warm and humid conditions, the fabric allows radiant heat to pass through. When conditions become cooler and drier, the fabric reduces the heat that escapes. Two types of synthetic materials in the fabric — one that absorbs water and another other that repels it — are coated with carbon nanotubes. The fibers warp and relax in response to changing humidity, opening and closing pores in the fabric. 

• In interviews with Advanced Textiles Source, four entrepreneurs were asked: What do you wish you had known early on when you were first dealing with intellectual property law and patent issues? “Get feedback on why you need a patent,” said Jeremy Wall, founder and CEO of smart-clothing startup Lumenus. “Where else could you spend $20,000?” Said Matt Kolmes, CEO of VOLT Smart Yarns: “Even if you are on a tight budget, file that Provisional application immediately before you show your idea to anyone, or talk about it with anyone."

• The Marie Sklodowska-Curie Action program is seeking applicants for a one- to two-year research fellowship at the Oslo Metropolitan University. The European Union-funded fellowship will focus on the energy-performance aspects of phase change material in buildings. "In this collaboration," OsloMet says, "we intend to gain our understanding and explore about the micro-structural aspect to relate the macro-scale behavior at continuum level." The application deadline is March 7.

PureTemp introduces temperature-control fabric coating

Ben Welter - Wednesday, January 23, 2019

PureTemp LLC has developed a fabric coating engineered to provide an effective buffer against ambient temperature swings in consumer products such as apparel, footwear, bedding, safety, medical, workwear and industrial applications.

Scanning electron microscope image of PureTemp fabric coating Through a proprietary process, PureTemp's biobased phase change material is enclosed in spherical microcapsules and bound to the surface of the fabric. PCMs absorb, store and release thermal energy as they cycle between solid and liquid states. The PCM coating interacts continuously with the unique microclimate of the human body, storing and releasing energy to balance body temperature and increase comfort.

PureTemp honeycomb pattern coatings are available for knit, woven, interlock, circular knits, nonwoven, cotton, polyester and other blends. The photo above shows what PureTemp coated fabric looks like under a scanning electron microscope.

The Minnesota company began producing the world’s first 100 percent biobased PCMs in 2007. PureTemp PCMs, developed in three years of research sponsored by the U.S. Department of Agriculture, are used in a wide variety of temperature-control applications, from cooling vests and warming blankets to shipping containers and coffee mugs.

PureTemp's Dan Keller is directing the business initiative. For more information on PureTemp coated fabrics, contact him via inquiries@puretemp.com or visit https://www.puretemp.com/fabrics.

PCM briefing: New Outlast materials on display at Heimtextil; agenda set for Jan. 24 workshop at Nottingham

Ben Welter - Saturday, January 12, 2019

Outlast recycled polysterNew Outlast products based on recycled materials were on display at the Heimtextil show in Frankfurt, Germany, this week. "In the new Outlast products," the company said, "temperature-regulating technology is applied to base material (knitted fabric or nonwoven) which is produced from 100% recycled polyester textiles or PET bottles and therefore meets the Global Recycle Standard (GRS). Further products that use renewable materials for other components of the technology are planned to expand the portfolio in the near future."

Tempur-Pedic says the latest version of its Breeze mattress line features a new "PureCool+ breathable phase change technology [that] absorbs excess heat and recharges faster to help the sleeper feel cooler when falling asleep."

Eindhoven University of Technology is seeking candidates for a Ph.D. position in nanoporous materials for thermal energy storage

Chemical & Engineering News is seeking candidates for a six-month science-writing editorial fellowship for 2019.

• A proposal to use microencapsulated phase change material to help motor vehicles run smoothly in extreme cold has been honored by Azerbaijan's Ministry of Economy as the best youth startup project of the year. A team of chemical engineering students from Baku Higher Oil School developed the concept.

The agenda has been posted for the Workshop on Energy Efficient Buildings & Thermal Energy Storage Systems to be held Jan. 24 at the University of Nottingham in the United Kingdom. Topics include "Enhanced geothermal borehole heat exchangers with PCMs," "Innovative composite smart materials for heating, cooling and humidity control in buildings" and "Demonstration of the TESSe2b system in three demo sites." The free, all-day workshop is part of the European Union-supported project TESSe2b.

•  From LinkedIn: "Pluss Advanced Technologies Pvt. Ltd. is expanding its vendor development team for its PCM and polymers business. Candidates with prior experience in purchase or vendor management will be preferred, others will be considered too. Want to understand more about the opportunity? Please write to Ruchika Garg at jobs@pluss.co.in."  

• The world's first grid-scale pumped heat energy storage is now in operation at Newcastle University. "The system consists of two containers – a cold store and a hot store – filled with gravel and an inert gas," Utility Week reports. "They are connected via a reversible heat pump/engine. When surplus energy needs to be stored, gas is withdrawn from the cold store and compressed using an electrically-powered pump, thereby raising its temperature. The gas is injected into the hot store where the heat is transferred to the gravel. It is then withdrawn from the hot store, expanded to further lower its temperature and returned to the cold store. To recover the stored energy, the process is reversed."

Dominic Hyde, vice president of Credo on Demand at Pelican BioThermal, said the rental program increased its temperature-controlled container fleet size by 90 and increased revenue by 90 percent in 2018.