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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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PCM briefing: 'New paradigm' in pharma cold chain; opening for sales manager at Sonoco ThermoSafe

Ben Welter - Monday, July 24, 2017

GoSun solar stove• The makers of the GoSun portable stove, which uses solar energy to bake, roast or steam food at temperatures up to 290° C, have raised nearly $400,000 from investors on seedinvest.com. The stove initially used high-temperature phase change material to store the sun's energy. "We abandoned the PCM a couple years ago after we started doing testing with it," said GoSun's Matt Gillespie. He said the material did not match the performance promised by the PCM maker, degrading "significantly" after just a few cycles. The current design uses compound parabolic reflectors and a horizontal vacuum tube to convert nearly 80 percent of sunlight into usable heat. The Cincinnati company has sold 10,000 stoves online and in retail outlets such as Home Depot, REI and Cabela's. GoSun plans to use the SeedInvest funds to support continued growth. 

• A “new paradigm” is evolving in the pharma cold chain to address the rapid advance in cellular and genetic therapies that require extremely low temperatures, Pharmaceutical Commerce reports.  

Bio-based chemical processes that include a thermochemical conversion step are finding favor as early forms of industrial bio-based processing mature, Chemical Processing reports.

• New from Accuray Research: "Global Thermal Energy Storage (TES) Market Analysis & Trends - Industry Forecast to 2025

• New from QYResearch: "Global High Temperature Phase Change Materials Market Research Report 2017"

• New from Future Market Insights: "Smart Fabrics Market: Global Industry Analysis and Opportunity Assessment 2016-2026"

• The University of Warwick has posted an opening for a Ph.D. studentship in thermal energy storage. The 3.5-year research position is open to candidates from the United Kingdom and European Union.  

Sonoco ThermoSafe has posted an opening for a regional sales manager

Creative Ticking of Gastonia, N.C., has announced two new PCM-based cooling technologies. Kyla treatments can be applied to fabrics at different levels depending on the desired cooling level, the company said. Kyla+ is a specially designed yarn that "is durable enough to withstand repeated washing without losing any cooling effects.” Creative Ticking is the bedding specialty division of Beverly Knits.

Patent application: Load-bearing structure

Ben Welter - Tuesday, July 18, 2017

U.S. patent application 20170197752 (applicant Airdex Corp., Henderson, Nev.):

"The present invention provides a movable load bearing structure with a surface that includes antimicrobial agents capable of eliminating, preventing, retarding or minimizing the growth of microbes and also minimizing cross-contamination when the load bearing structure is being reused for cargos that differ from a previously transported cargo, for example, different food types, such as poultry, fresh vegetables, and fresh fruit. The load bearing structure may be a dunnage platform or a container for storing and/or shipping cargo. ... In an embodiment of the invention, the pockets may be used to locate phase change materials."

http://www.freepatentsonline.com/20170197752.pdf

North Carolina company ramps up production of Temperfect mugs

Ben Welter - Tuesday, July 18, 2017

The temperature-controlled coffee mug market heated up a bit this month with word from Joeveo that it has completed the shipment of 5,000 Temperfect mugs to Kickstarter backers. The Wake Forest, N.C., startup is now contacting customers who placed subsequent orders to let them know that their mugs will soon be shipped.

Temperfect PCM mugThe 16-ounce mug uses phase change material to cool coffee or tea to a drinkable temperature and keep it there. How is the Temperfect mug ($40-$45) different from two notable competitors, the Ember ($150) and Lexo ($38-$48)?

"The Ember mug is a more complex hybrid PCM/electronic design, 12-ounce rather than 16-ounce like the Temperfect mug, and has a significantly higher price," said Joeveo's Dean Verhoeven, who launched the Kickstarter campaign in November 2013. "The electronics and battery of course allow adjustment of the hold temperature, which a straight PCM mug like the Temperfect won't do.

"The Lexo flask is easier to compare to the Temperfect, as it is strictly PCM-based, and a 16-ounce model is available. The Temperfect mug uses a higher-temperature PCM (61°C vs. 56°C), it's smaller, lighter and has more of a travel mug design rather than the traditional cylindrical thermos shape of the Lexo. It's more colorful!

"Lexo offers what I call a 'backpackable' lid, whereas the current Temperfect lid is optimized for ease of use in a car cupholder, and not for a hermetic backpack-safe seal."

Once Joeveo has caught up on current orders, are there plans to sell on Amazon or in coffee shops or brick-and-mortar stores?

"Yes, we'd like to try both," Verhoeven said. "Brick-and-mortar at some shops we like around here to see what it's like and to get some experience."

Patent application: Technologies for releasing thermal energy

Ben Welter - Tuesday, July 11, 2017

U.S. patent application 20170188754 (inventor Melissa Zimberg, Maplewood, N.J.):

"A heat unit containing a phase change material consisting of polyethylene glycol and a fatty acid combination of stearic and palmitic acids is disclosed. When heated in a microwave for about four (4) minutes the heat unit reaches a temperature of about 70° C. (158° F.). When placed in an insulated container, the heat unit will, after six (6) hours, have a temperature of about 40° C.-55° C. (104° F.-131° F.). The heat unit is advantageous for maintaining food hot during transport as well as other uses where long term heat emission is needed."

http://www.freepatentsonline.com/20170188754.pdf

PCM-based system cuts energy use by 27% in frozen-foods warehouse

Ben Welter - Monday, April 24, 2017

Viking Cold Solutions systemFrozen Gourmet Inc., a wholesale distributor of premium ice cream and other frozen foods, says a PCM-based thermal battery system has cut energy consumption by more than 27 percent in the company’s freezer warehouse in Redding, Calif.

The Viking Cold Solutions system, installed at the end of 2016, features hundreds of plastic bottles filled with a salt hydrate solution. The bottles are suspended from the ceiling of the 7,900-square-foot warehouse. The phase change material solidifies when the warehouse chillers are running. The PCM absorbs heat as it melts, allowing the chillers to run less frequently and still keep the warehouse within a few degrees of the target temperature, 14.8º Celsius. 

Shifting demand to off-peak hours can result in significant savings on electricity in California, where daytime demand charges are common. The Viking system also includes intelligent controls and sensors to optimize energy use and alert managers to temperature abnormalities, equipment failure and power outages.

"We searched for a year to find the right technology to reduce our energy costs and decided to purchase the Viking Cold TES system after seeing the capability and flexibility the system provides," said Bill Kohn, CEO of Frozen Gourmet. "The reduction in energy consumption has improved our bottom line and the real-time monitoring has been invaluable in helping us recognize and address equipment issues before expensive problems arise."

http://finance.yahoo.com/news/frozen-gourmet-installs-viking-cold-130000052.html

Patent application: Multizone recreational cooler with phase change material

Ben Welter - Thursday, April 20, 2017

Viking Cold Solutions patent drawingU.S. patent application 20170108260 (applicant Viking Cold Solutions, Houston, Texas):

"A cooler includes a body. The cooler also includes a divider that divides an interior of the body into a first zone and a second zone. A first phase change material module is disposed in the first zone of the interior of the body and a second phase change material module is disposed in the second zone of the interior of the body."

http://www.freepatentsonline.com/20170108260.pdf

Patent application: Heated or cooled dishware and drinkware and food containers

Ben Welter - Monday, February 20, 2017

Ember patent drawingU.S. patent application 20170042373 (applicant Ember Technologies Inc., Westlake Village, Calif.):

"An actively heated or cooled food container can have a lid movable between an open and a closed position and an insulated body to which the lid can be attached. The insulated body can have a sidewall that defines a perimeter of the container body and a base, the sidewall and base defining one or more chambers that can be sealed by the lid. ... The heating and cooling system comprises a cooling element comprising a phase change material disposed in a chamber that surrounds at least a portion of the inner sidewall so that the phase change material is in thermal communication with at least a portion of the inner sidewall of the portable body, the phase change material configured to transition from one phase to a second phase at a predetermined temperature."

http://www.freepatentsonline.com/20170042373.pdf

Thanks to PCM insert, luxury chocolates melt in your mouth, not in the box

Ben Welter - Monday, February 20, 2017

In hot climates, chocolates bought at retail shops can end up melting on the way home. Pluss Advanced Technologies of India has introduced a packaging insert to keep the sweets in solid form during transit.

Pluss PCM insertDeveloped for ITC’s Fabelle line of premium chocolates, the insert features inorganic phase change material contained in a non-woven film. Vishnu Sasidharan, vice president of new product initiatives at Pluss, says the PCM was customized to keep the chocolate between 3º and 9º Celsius. The insert, designed for one-time use, measures about 170mm x 70mm. The goal is to maintain product quality and texture for one to two hours.

“The product was launched about five months back,” Sasidharan says. “It was available only in one hotel chain within ITC group of hotels. The boutique has gained much traction only in the last few months with ITC expanding it to not only within their group but in all the 5 star/7 star hotels across India.”

Pluss is working with other chocolate/confectionary companies to offer similar solutions for premium temperature-sensitive products.

PCM briefing: Alexium adds clients in bedding industry; new research on temperature-controlled pharma packaging

Ben Welter - Tuesday, June 07, 2016

Alexium International has announced an agreement to sell its new flame-retardant phase change material to a U.S.-based textile finisher serving the bedding industry. Alexium, based in Perth, Australia, and Greer, S.C., announced in May that it had reached a PCM sales agreement with one of the world's largest producers of mattress ticking. "Alexium is now in production or full-scale trials with six global mattress fabric finishers," said CEO Nicholas Clark "and for the first time, a major manufacturer in apparel is evaluating our flame retardant phase change material technology." 

• New from Research and Markets: "Temperature Controlled Pharmaceutical Packaging Solutions (TCPPS) Market: Global Industry Analysis and Opportunity Assessment, 2016-2026."

TheM dining mat• Months after falling short of raising $30,000 on IndieGoGo, developers of a PCM-powered thermal dining placemat called TheM said in January that they hoped to develop a successful design by the end of February. The team is now apologizing again, telling backers: "The PCM material did not work as intended and [we are] trying to develop a solution that can still add value to the innovation. Please bear with us and within the next 60 days [we hope] to have a product with which [we] can reward your support and patience."

Ira Smith, director of strategic development for global transport and biologistics at Pelican BioThermal, is among the panelists at the FlyPharma conference in Brussels this week. The topic: The increasing appeal of inter-continental rail freight services and sea freight.

Glacier Tek cooling vests are profiled in the June issue of OR Today magazine. The vests, which use PureTemp bio-based phase change material to maintain thermal comfort, are being marketed as a way to address heat stress among surgeons and operating room staff, who endure "bright lights, sterile gowns, lead aprons, physical exertion and time stress."

GreenCE is offering a free hourlong webinar, "Reinventing Green Building: Focus on Carbon & Leverage Technology," at 1 p.m. June 14. Instructors will discuss the limitations of LEED certification in various U.S. market segments and identify alternatives to LEED certification. 

• The National Renewable Energy Laboratory has named Peter Green as the new deputy laboratory director for science and technology. Green is a professor of materials science and engineering, chemical engineering and applied physics at the University of Michigan.  

Monodraught's Cool-Phase cooling and ventilation system has been specified for Harrogate's new civic headquarters, now under construction in County Durham, England. The system combines a phase change material thermal energy store with an intelligently controlled air handling unit to actively ventilate and cool buildings without the use of refrigerants. The company says the system contributes credits toward BREEAM standards for lifecycle costs, indoor air quality and low- and zero-carbon technologies. 

PCM briefing: Cold Chain Global forum agenda is set; deal reached on overhaul of TSCA

Ben Welter - Friday, May 20, 2016

The full agenda has been released for the 14th Cold Chain Global Forum to be held Sept. 26-30 in Boston. Sponsors and exhibitors include Pelican BioThermal, va-Q-tec AG, Cold Chain Technologies, American Aerogel, RGEES and Sonoco ThermoSafeFrank Butch, director of engineering at ThermoSafe, will lead a master class on temperature assurance packaging certification. Conference registration is open, with early bird rates available through June 3. [pdf]

• U.S. House and Senate negotiators have agreed on a bill overhauling the 40-year-old Toxic Substances Control Act. Under the compromise version, EPA regulations would pre-empt most new state regulations, although states could still enact measures such as monitoring and labeling of chemicals, the New York Times reports.

• In a piece on the importance of cocktail ice, Primer magazine offers a unique description of how water freezes and melts: "The two ideas that help us understand the changes in water jumping between a solid and liquid state are enthalpy and entropy. Which I like to oversimplify and think of as order and disorder, enthalpy being order and entropy being the little shit disturber that lets it all go to hell. Enthalpy wants to freeze your ice and entropy wants to melt it, neither one of them ever really completely win this battle but who reigns over the other at any given time is decided by temperature: If the temperature is at -5°C/23°F enthalpy has the upper hand, if it’s 20°C/60°F then it’s entropy’s ball game."