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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 monthly PCM newsletter. Or join the discussion on LinkedIn.

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Research roundup: Hysteresis; reflective roof coating; optimizing energy balance of nearly zero energy buildings; more

Ben Welter - Monday, August 31, 2020

From Journal of Molecular Liquids:

The research progress on phase change hysteresis affecting the thermal characteristics of PCMs: A review

From Journal of Building Engineering:

Thermal behavior of a phase change material in a building roof with and without reflective coating in a warm humid zone

From Renewable Energy:

A comprehensive study on thermal storage characteristics of nano-CeO2 embedded phase change material and its influence on the performance of evacuated tube solar water heater

From Sustainable Cities and Society:

Numerical analysis of phase change materials for optimizing the energy balance of a nearly zero energy building

From Journal of Energy Storage:

Multi-objective optimization of cooling and heating loads in residential buildings integrated with phase change materials using the artificial neural network and genetic algorithm
Assessing corrosive behaviour of commercial phase change materials in the 21–25 ºC temperature range
Exergy and economic analyses of nanoparticle-enriched phase change material in an air heat exchanger for cooling of residential buildings
Experimental and numerical investigation on enhancing heat transfer performance of a phase change thermal storage tank
The effect of ultraviolet coating on containment and fire hazards of phase change materials impregnated wood structure

From Energy Conversion and Management:

Application of granular materials for void space reduction within packed bed thermal energy storage system filled with macro-encapsulated phase change materials

From Chemical Engineering Journal:

Simultaneous solar-thermal energy harvesting and storage via shape stabilized salt hydrate phase change material

From Solar Energy:

Characterization and cooling effect of a novel cement-based composite phase change material
Effect of polymer-derived silicon carbonitride on thermal performances of polyethylene glycol based composite phase change materials

From Case Studies in Thermal Engineering:

Effect of porosity and pore density of copper foam on thermal performance of the paraffin-copper foam composite Phase-Change Material

From Renewable and Sustainable Energy Reviews:

A critical assessment on synergistic improvement in PCM based thermal batteries

From Journal of Energy Resources Technology:

Experimental Analysis of Salt Hydrate Latent Heat Thermal Energy Storage System With Porous Aluminum Fabric and Salt Hydrate as Phase Change Material With Enhanced Stability and Supercooling

From Energy Sources:

Experimental study on thermal management and performance improvement of solar PV panel cooling using form stable phase change material
Experimental investigation of thermal performance of indirect mode solar dryer with phase change material for banana slices

From Aalto University:

Experimental design and investigation on a thermal energy storage system using phase change materials [thesis]

From Journal of Applied Physics:

Development of eco-sustainable plasters with thermal energy storage capability

From Chemical Engineering Transactions:

Thermal Performance of Phase Change Material Wallboard with Typical Structure: Artificial Controlled Condition Experimental Investigation

From Materials Research Express:

Fabrication of thermal energy storage wood based on graphene aerogel encapsulated polyethylene glycol as phase change material
Preparation and characterization of acrylic resin encapsulated n-dodecanol microcapsule phase change material

From ACS Sustainable Chemical Engineering:

Synthesis and Characterization of Fatty Acid Amides from Commercial Vegetable Oils and Primary Alkyl Amines for Phase Change Material Applications

From Carbohydrate Polymers:

Fibrous form-stable phase change materials with high thermal conductivity fabricated by interfacial polyelectrolyte complex spinning

From Materials Today: Proceedings:

Effect of various phase change materials (paraffin wax/hydrogenated vegetable oil) packed in a fabricated shell and tube type heat exchanger

From Solar Energy Materials and Solar Cells:

Composite phase change materials with heat transfer self-enhancement for thermal energy storage
Novel network structural PEG/PAA/SiO2 composite phase change materials with strong shape stability for storing thermal energy

From International Journal of Refrigeration:

Improving the performance of household refrigerating appliances through the integration of phase change materials in the context of the new global refrigerator standard IEC 62552:2015

From Advances in Colloid and Interface Science:

Nanoencapsulation of phase change materials (PCMs) and their applications in various fields for energy storage and management

From Building and Environment:

Space heating performance of novel ventilated mortar blocks integrated with phase change material for floor heating

From Energy:

A promising form-stable phase change material composed of C/SiO2 aerogel and palmitic acid with large latent heat as short-term thermal insulation

From Journal of Cleaner Production:

Enhanced thermal storage capacity of paraffin/diatomite composite using oleophobic modification

From International Conference on Renewable Energies for Developing Countries:

Storage efficiency of paraffin-LDPE-MWCNT phase change material for industrial building applications

4-man canoe team will test Glacier Tek cooling vests in 340-mile race

Ben Welter - Sunday, August 02, 2020

A four-man canoe team will put Glacier Tek cooling vests to the test this week at the Missouri 340, a 340-mile paddle race from Kansas City to St. Charles, Mo.

Competitors have 88 hours to complete the Missouri River course. The race, first held in 2005, typically draws hundreds of canoeists and kayakers. The event record, set by a two-person canoe team in 2018, is 34 hours, 34 minutes.

Team Mississippi, led by Scott Miller, 44, of Minneapolis, will be paddling a 23-foot Wenonah Minnesota IV.

Scott Miller“The MR340 is usually held in July or August and is famous for being hot,” said Miller, right. “This year, however, the forecast looks shockingly mild, with highs in the upper 70s. We will be working hard, however, and expect to be in the bright sun much of the time and still generating plenty of body heat, so we anticipate the vests still being very useful during the sunniest and hottest times of the day.”

Glacier Tek cooling vests are designed to maintain a microclimate of 59 degrees F for up to 2.5 hours in 100 F heat. The cooling packs are powered by PureTemp, a phase change material certified as 100 percent biobased by the U.S. Department of Agriculture. The packs can be recharged in as little as 20 minutes in ice water. A support crew will supply Team Mississippi with fully charged packs as needed.

About the paddlers:

Rod Price, 60, of Winter Garden, Fla., has won approximately 300 canoe races in his 40 years of competition. He is the only paddler to complete North America's three longest distance races: the 1,200-mile Ultimate Florida Challenge (2012), the Yukon 1000-mile canoe race (2009) and the 750-mile Race to Alaska (2017). In 2019 Rod was selected for the Team USA Senior Dragon Boat Squad that competed in Thailand and won three gold medals. He has written three books about his racing adventures: “Racing to the Yukon” (2009), “Racing Around Florida” (2012) and “Have Paddle Will Travel” (2019).

How he copes with extreme heat: “Constantly hydrates with cold fluids containing electrolytes, wears light clothing and a sun hat and puts on sunscreen several times each day.

Oliver Simes, 27, of Cornucopia, Wis., has spent the last few years as a sea kayak guide in the Apostle Islands National Lakeshore. Paddled the length of the Mississippi River solo in a kayak in 2016.

How he copes with extreme heat:  “Keep ice in an insulated bottle. Going for swims.”

Bobby Johnson, 42, of Dunedin, Fla., has been been kayak racing for four years.

How he copes with extreme heat: “Depends on race. Clothing , hats, energy output. I run along shore under trees. Use the water I’m paddling on. Deal with it. Train hard.”

Scott Miller, 44, Minneapolis, Minn. In 2005, he paddled over 2,000 miles from Minneapolis to Hudson Bay (where the polar bears live), to celebrate the 75th anniversary of the trip taken by Eric Sevareid and Walter Port in 1930.

How he copes with extreme heat: “Dip hat or headband in water, hydrate before, during and after paddling, wear body-covering clothing to protect skin from the sun.”

About Glacier Tek

Glacier Tek LLC of Minneapolis, Minn., has been making high-tech garments that help defend the wearer from heat stress in extreme environments for more than 20 years. Glacier Tek’s first product, the Original Cool Vest, was among the earliest completely self-contained body cooling vests on the market. Our satisfied repeat customers include Dow Chemical, General Electric, General Mills, Kaiser Permanente and the FBI.

BioPreferred labelGlacier Tek cooling vests feature PureTemp phase change material, a biobased technology designed to absorb heat generated by the wearer. Glacier Tek vests maintain a comfortable 59 degrees for up to 2.5 hours, even in the most extreme heat, and never over-cool. Our vests offer better safety and cooling duration than that of evaporative, ice or gel-cooled vests.

Each Glacier Tek vest includes a set of cooling packs powered by PureTemp, a safe and effective biobased material. All Glacier Tek cooling packs have earned the USDA Certified BioPreferred® label, verification that the amount of renewable biobased material in the product meets or exceeds levels set by the U.S. Department of Agriculture.