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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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Patent application: High-density latent heat storage device

Ben Welter - Friday, May 10, 2019

University of Texas patent drawing

U.S. patent application 20190137190 (applicant Board of Regents, University of Texas System, Austin, Texas):

"Latent heat storage devices are disclosed, such as latent heat storage devices comprising a phase change material encapsulated in sufficiently conductive tubes, wherein the tubes are arrayed in a hexagonal-packed pattern. The devices herein can be used, for example, in residential and/or commercial HVAC systems."

http://www.freepatentsonline.com/20190137190.pdf

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: 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.

Patent application: Heat exchanger for an exhaust tuning system

Ben Welter - Monday, April 29, 2019

U.S. patent application 20190120103 (applicant Ford Global Technologies, Dearborn, Mich.):

"Methods and systems are provided for a heat exchanger phase change material installed as a component of a variable exhaust tuning system. In one example, a method may include absorbing excess heat energy from exhaust gases during and after an engine-on event within a heat exchanger material, releasing heat energy stored in the heat exchanger material during and after an engine-off event, and heating an adjustable exhaust valve with the heat energy stored in the heat exchanger material."

http://www.freepatentsonline.com/20190120103.pdf

PCM briefing: Ice Energy signs distribution deal; Bloom joins Sunamp as board chairman

Ben Welter - Monday, April 22, 2019

Ice Energy of Santa Barbara, Calif., has reached distribution agreements with four California companies to sell, install and maintain its ice-based thermal storage system, the Ice Bear 20. The companies are Correy Baker Heating and Air of Murrieta; Emery Mechanical Engineering of San Diego; H3 of Santa Barbara; and SunRize Mechanical of Temecula. “This distribution network will enable us to further expand our footprint in the residential market in Southern California,” said Marcel Christians, co-COO of Ice Energy.

Sonoco ThermoSafe and AirBridgeCargo Airlines have announced a global partnership agreement for the leasing of the PharmaPort 360 temperature-controlled shipping container. The agreement will enable pharmaceutical shippers to lease PharmaPort 360 containers directly from AirBridgeCargo.

Martin Bloom• Thermal battery maker Sunamp Ltd. of Scotland has appointed Martin Bloom as chairman of the board. Bloom, right, has extensive experience in high-growth technology and renewable energy companies, including Chinese solar company Renesola and Loughborough-based fuel cell specialist Intelligent Energy. Bloom succeeds Sunamp’s founding chairman, Bob Pettigrew, who oversaw its early growth.

Nominations are being accepted for the 2019 Poncelet Prize for Innovation in Microencapsulation, co-sponsored by Procter & Gamble and the Bioencapsulation Research Group. The award recognizes innovation in process design and modernization; development of new core and shell materials; innovation in characterization methods; or innovation in emerging fields of applications. The deadline for submitting nominations is May 31, 2019.

Peli BioThermal is rebranding its Chronos temperature-controlled shippers. CoolGuard PCM will replace Chronos Express, and CoolGuard Advance will replace Chronos Advance. The CoolGuard shippers will offer configurations with fewer components and additional temperature set points, such as 16º C.

• Registration is open for "Phase Change Material & Passive Cooling in Large Venues," a lunch-hour presentation by Henderson Engineers. The free event, sponsored by AIA Kansas City, will be held June 12 at the Center for Architecture & Design in Kansas City, Mo.

Axiotherm GmbH's kraftBoxx thermal energy storage system is a finalist for a Smarter E Award in the renewable energy category. KraftBoxx is a joint development with Klara Energy and Tuxhorn within the scope of the PCM-based HeatSel product line marketed by Axiotherm. Winners will be announced May 15 in Munich.

• PCM expert Harald Mehling's new book is available on Amazon: "Understanding the Basics of Energy: An Introduction from Simple to Complex Situations."

Tempur-Pedic of Lexington, Ky., says its new TEMPUR-breeze mattress will help sleepers "stay up to 8 degrees F cooler through the night." According to Tempur-Pedic: "At about 80°F, the molecules within TEMPUR-breeze’s most efficient Phase Change Material (PCM) to-date, PURECOOL+, activate, shifting from a solid to a liquid to absorb massive amounts of heat. For the first time, Tempur-Pedic’s scientists successfully altered these proprietary molecules to deliver more phase change material, increasing its capacity to absorb heat by 2x compared to other PCM."

• Two new ASHRAE publications will be available in June: "Owner’s Guide for Buildings Served by District Cooling" and an updated edition of the "District Cooling Guide" for designers and building owners around the world.

• Researchers at Sweden's KTH Royal Institute of Technology have developed a polyethylene glycol-infused wood material that could be used to make windows that absorb heat during the day and release it into the home at night. The researchers are working to increase the heat storage capacity of the transparent wood, Smithsonian.com reports.

Patent application: Air-conditioning system

Ben Welter - Friday, April 19, 2019

U.S. patent application 20190113259 (applicant Ford Global Technologies LLC, Dearborn, Mich.):

"An air-conditioning system includes first and second PCM vessels, a heat recovery circuit, and a conduit and valve system. The heat recover circuit includes a third PCM vessel. The conduit and valve system operably couples i.) a first heat exchanger to the first PCM vessel and a radiator, ii.) a second heat exchanger to a core and the second PCM vessel, and iii.) the heat recovery circuit to the first heat exchanger."

http://www.freepatentsonline.com/20190113259.pdf

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.

Research roundup: Micro/nano PCM for solar thermal applications; photovoltaic cooling; beeswax emulsions; more

Ben Welter - Thursday, March 21, 2019

From Renewable Energy:

Review on micro/nano phase change materials for solar thermal applications

From Jordan Journal of Mechanical and Industrial Engineering :

Photovoltaic Cooling Using Phase Change Material

From Advanced Materials Interfaces:

Phase Change Materials: Superhydrophobic Coatings from Beeswax‐in‐Water Emulsions with Latent Heat Storage Capability

From Energy Storage:

Experimental Observations on the Interface Front of Phase Change Material inside Cylindrical Cavity

From Applied Energy:

Effect of different dimensional carbon materials on the properties and application of phase change materials: A review

Sunamp signs agreement with Chinese heat pump maker

Ben Welter - Monday, March 18, 2019

Sunamp Ltd. of Scotland has signed a memo of understanding with a Chinese manufacturer to develop a heat pump water heater for the residential market.

Sunamp UniQ 12 heat batteryThe new technology will combine heat pumps made by Jiangsu Gomon Renewable Energy Development Co. and Sunamp's UniQ heat batteries, which use a salt-based phase change material to store excess energy generated by solar PV systems. The stored energy is released on demand to provide heat and hot water.

The two companies signed the agreement last week at the ISH trade fair in Frankfurt. The agreement sets the terms for manufacturing and marketing the product in China and worldwide. Sunamp says product testing is already underway.

“Sunamp aims to displace as many water tanks as possible with UniQ heat batteries," said Maurizio Zaglio, Sunamp's international business development manager. "The fact that one of the largest manufacturers of water tanks in the world has decided to develop a new product with us is an important milestone for Sunamp."

In a presentation at ISH, Zaglio put it more plainly: "We are not here to complement hot water tanks - we are here to replace them!"

The deal is Sunamp's second with a major Chinese manufacturer in the past four months. In November, the company signed an agreement with Trina Solar to develop an integrated solution combining Sunamp heat batteries now made in Scotland with heat pumps manufactured at Trina's new factory in Changzhou, China.

https://www.insider.co.uk/news/heat-storage-battery-pioneer-sunamp-14121831

Research roundup: Personal cooling system; optimization of active wall system; cement mortar; asphalt pavement; more

Ben Welter - Friday, March 15, 2019

From International Journal of Refrigeration:

Experimental study of enhanced PCM exchangers applied in a thermal energy storage system for personal cooling

JMR illustration of microencapsulated n-octadecane with silk From Journal of Materials Research:

Fabrication and characterization of microencapsulated n-octadecane with silk fibroin–silver nanoparticles shell for thermal regulation

From IOP Conference Series: Earth and Environmental Sciences:

Simple Thermal Energy Storage Tank for Improving the Energy Efficiency of an Existing Air-conditioning System
An optimization study into thermally activated wall system with latent heat thermal energy storage
Simulation of operation performance of a solar assisted ground heat pump system with phase change thermal storage for heating in a rural building in Xi'an
Experimental Study on the Demand Shifting Effects of PCM Integrated Air-Conditioning Duct

From International Journal of Energy Research:

Efficiency optimisation of the thermal energy storage unit in the form of the ceiling panel for summer conditions

From Materials Research Express:

Experimental study on thermal conductivity of composite phase change material of fatty acid and paraffin

From Energies:

Design Optimization of a Hybrid Steam-PCM Thermal Energy Storage for Industrial Applications

From Construction and Building Materials:

Analysis of thermoregulation indices on microencapsulated phase change materials for asphalt pavement

From Applied Thermal Engineering:

Experimental and numerical characterization of an impure phase change material using a thermal lattice Boltzmann method

From Energy Conversion and Management:

Experimental and numerical study of a vertical earth-to-air heat exchanger system integrated with annular phase change material

From Materials:

Thermal and Structural Characterization of Geopolymer-Coated Polyurethane Foam—Phase Change Material Capsules/Geopolymer Concrete Composites

From Applied Sciences:

Microstructure and Mechanical Properties of Cement Mortar Containing Phase Change Materials