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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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PCM battery shows promise in home heating system

Ben Welter - Tuesday, September 15, 2020

A home heating system equipped with a PCM battery put up encouraging numbers in a small trial in northern Italy earlier this year. The monthlong test “shows that is possible [for such a system] to supply the whole heating demand of a house reducing close to zero the costs,” says Domenico Feo, who developed the system. The full report, prepared by ThermaLink, a trademark of Sunservice Srl of Treviso, Italy, is available here.

ThermaCubeThe system is composed of a 6 kW solar array, an air/water heat pump and a thermal battery filled with BioPCM Q42, a biobased phase change material supplied by Phase Change Energy Solutions of Asheboro, N.C. A control unit, PCDCube, monitors temperatures and manages energy flow to optimize system performance. In an interview with Phase Change Matters, Feo answered questions about the heat battery, recently rebranded as ThermaCube.

Q: Thermal conductivity has proven to be a challenge in thermal energy storage across most types of PCM. Was conductivity an issue with the required charge/discharge cycles?

A: "As already known, the thermal conductivity of the PCM, especially of the organic one that we use, is low. This is, at the same time, a disadvantage and an advantage. The disadvantage has been minimized in using a heat exchanger made with a flat aluminum panel with the various layers just over 1 inch of distance; in this way we are able to make the entire volume of material work in a very efficient way. Vice versa this is an advantage for the very low heat losses during the non-work phases; in conditions of installations inside the buildings, the temperatures can be maintained for several days."

Q: If faster heat transfer is required, do you envision a redesign of the heat exchanger or a modification of the PCM to meet the demand of the energy transfer?

A: "As manufacturer, we can customize the heat exchanger dimensions and shape in order to achieve our goals, but as always in the industrial scalability, the quantities are mandatory for a good price. We designed a single heat exchanger dimension and multiply it in order to be able to produce the different storage capacities and realize a complete modular range. The transfer of energy can be however accelerated by increasing the flow rate of the fluid and the delta T between the fluid and the melting point, of course there is always a limit to this possibility. There are still studies around this point that need to be better understood."

Q: Would implementing several PCMs of different melting temperatures aid in the overall performance of the TES?

A: "Let's say that we expect a slight drop in performance at lower temperatures, but we don't have many other tests to give you a more general opinion."

Q: How is the PCM temperature measured throughout the entire storage to provide input to the PCDCube? Since the melting/solidification of PCM is not a homogenous process, are multiple measurements necessary to get a realistic status of the PCM?

A: "In the documents that we have published, we do not specify that we have installed two temperature probes, one in the center and another one near the walls and it is evident that, when the final phase of the  discharge of the PCM approaches, the perimeter probe shows a decrease of more sudden temperature than the central one. We, however, assume that the fact of having installed our thermal battery outside the building in a very cold climate, has exaggerated the heat loss despite the low heat transmission."

Q: Have you considered other PCM suppliers/products, since many are located in Europe and the RAL quality organization is based there?

A: "This is a possibility, at least for the distribution of our products in Europe and Asia. Currently we try to separate the supply of the case with exchangers (that we manufacture) from the PCM with direct purchase of the client from the supplier, especially in the larger units."

Q: What is the customer value proposition for this product? What is the expected return on investment/payback period?

A: "This is a $1 million question; the proposal is certainly into the growing wave of the storage market, even the electrical ones for PV systems. (A Tesla Powerwall is cool but not economically advantageous if you don’t pay attention at the payback that is higher than the life of the battery). The best value proposition is to separate production from the consumption of the energy and take advantage of renewable energies which, unfortunately, are linked to the day / night cycle and the outdoor temperature conditions. We see perfect the combination HP + Thermal Battery because we can concentrate the HP working hours during the best outdoor conditions that, for many reasons, are affecting and reducing the performances.  Furthermore, we also see a large market in the use of these thermal batteries in all these existing systems which are undersized or which, due to specific situations of changing use of the building, are no longer able to provide the necessary heating or cooling to the whole plant. About the ROI, this really varies a lot country by country because the cost of the electricity has different rates and peak hours schedules. The industrial needs are sometimes much more interesting and attractive than the residential ones."

Q: What are your plans for a commercial rollout?

A: "We are completing the Italian sales force and are looking for international distributors. Our goal is to propose the range of products at an international level with distribution agreements for the case only with exchangers; it will obviously be our responsibility to direct the partner to some reliable and high-quality PCM manufacturers. Obviously, those who will quickly give us the opportunity to build pilot plants, demonstrating the technology, will have an advantage in introducing them into the market and in the exclusivity of the contractual relationship."

PCM briefing: ThermoSafe-ACL Airshop agreement; new CEO at Phase Change Energy Solutions

Ben Welter - Sunday, September 06, 2020

Pegasus ULDSonoco ThermoSafe and ACL Airshop have announced a global agreementfor the handling and repair of ThermoSafe’s Pegasus ULD bulk temperature-controlled containers ACL Airshop, of Greenville, S.C., provides cargo support equipment and logistics solutions for airlines and air cargo carriers. Sonoco says the unit load device is made of composite materials that are lighter and more damage-resistant than traditional metal containers. It uses a gelled phase change material to maintain pharmaceutical-safe temperatures for five days or more, depending on the PCM used.

Has long-term thermal energy storage come of age? That's the premise of a recent advertorial sponsored by Viking Cold Solutions on Greentech Media's website. The Houston company says its PCM-based system, designed for use in cold storage facilities, stores enough energy to cycle off refrigeration for up to 13 hours per day and reduce energy consumption by more than 25 percent. Not much new in the article, but the reader comment section might be of interest to people who are familiar with the technology.

• A cycling club in Great Britain teamed up with Peli BioThermal this summer to deliver temperature-sensitive prescriptions to housebound people. The company supplied Banbury Star Cyclists with Crēdo ProMed temperature-controlled medical transport bags. The PCM-equipped bags are designed to transport pharmaceutical samples and medical supply payloads within two ranges, 2-8°C and 15-25°C.

Phase Change Energy Solutions of Asheboro, N.C., has a new chief executive officer. Govi Rao, co-founder and managing partner at CARBON Group Global, joined the company in April. His predecessor, Dennis McGill, had held the position since December 2018.

Sunamp Ltd. of Scotland has raised 4.5 million pounds in a Series A financing round led by Chilean venture capital firm Aurus Capital. Sunamp says it will use the funds to support commercial scaling in the United Kingdom and expansion in Central Europe, Asia and North America.

• The 15th Conference on Advanced Building Skins will be held as scheduled Oct. 26-27 in Bern, Switzerland. "In the unlikely event that the conference will not take place, or the participant may not be able to travel," organizers say, "paid registration will be credited to our conference next year." The 12 sessions, with over 70 presentations, will also be available online.

• A four-man canoe team put Glacier Tek's PCM-powered cooling vests to the test last month at the Missouri 340, a 340-mile paddle race from Kansas City to St. Charles, Mo. Team Mississippi, led by Scott Miller, 44, of Minneapolis, finished 11th overall in the race, completing the course in 44 hours, 38 minutes. The race drew more than 350 entries. Team members used the vests to cool down at checkpoints. Miller, second from left in the photo, plans to use the vests to battle the heat in the Great Alabama 650, which bills itself as the world's longest annual paddle race. That event begins Sept. 26 on the Coosa River in northern Alabama.

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.

INUTEQ donates hundreds of cooling vests to Dutch hospitals

Ben Welter - Monday, May 11, 2020

Hundreds of INUTEQ cooling vests developed for use by Dutch athletes at the Tokyo Olympics this summer have been donated for use in Dutch hospitals during the COVID-19 pandemic.

INUTEQ PCM pulloverThe PCM-equipped pullovers, designed to help athletes cope with heat stress, became available when the Tokyo Games were postponed until 2021. The pullovers can be worn under the heavy, heat-trapping protective gear used by doctors and nurses.

The pullovers are manufactured in Netherlands. The cooling material is Croda's CrodaTherm 21, a biobased PCM with a melting temperature of 21 degrees C. The 1.3-kg pullover is a simple "one-size-fits-most" garment, with two adjustable buckles and no fabric shell. 

“Doctors and nurses at the ICU, who are treating corona patients, can work comfortably for up to three hours longer thanks to this cooling vest," said Dr. Thijs Eijsvogels, physiologist at Radboud University Medical Center, Nijmegen. "The cooling vests ensure a stable body temperature, less sweating, maintenance of concentration and a faster recovery after each intensive work session.”

The pullover is marketed as "PCM CoolOver" on the INUTEQ website. It can be worn "under military combat gear, hazardous materials suits, mascot costumes and other professional apparel."   

https://inuteq.com/pcm-coolover-medical-nl/pcm-coolover-medical-eng/

Phase Energy announces a new shape-stable PCM

Ben Welter - Monday, May 11, 2020

Phase Energy Ltd. has announced the development of shape-stable technology for organic wax-based PCMs.

The company, based in Hull, United Kingdom, said a tetradecane-based shape-stable material would typically contain more than 90% PCM; the new technology has achieved levels of up to 96%. "Initial tests indicate that little, if any, enthalpy is lost, possibly due to the very low level of additives required," the company said.

The technology was jointly developed with Rainer Busch of IBC Europe, Germany.

"So far, the technology has been used for paraffins, esters etc. and on a range of PCMs with [melt points] of up to 53 degrees Centigrade," Phase Energy said in a LinkedIn post. "The technology permits the production of leak-resistant packs/pouches using very simple process technology." 

"We’re currently working with some companies in the cold chain area; looking at cold packs/pouches, pallet covers etc.," Ian Biggin, director at Phase Energy, said in an e-mail. "As the technology can be adapted to higher temperature PCMs we are also interested in those areas as well but we decided that cold chain was the obvious place to start."

The photo below illustrates the material's flexibility. According to the company, it "shows a shape stable sample, 100 x 30 x 12mm, containing 92% tetradecane and 8% additives, being stretched to >700mm. When released the sample returned to its original size."

http://phase-energy.com/new-shape-stable-pcm-development/

Research roundup: Polythioether-based PCMS; alginate encapsulation; temperature stresses in concrete pavement; more

Ben Welter - Friday, May 08, 2020

From European Polymer Journal:

Extremely fast synthesis of polythioether based phase change materials (PCMs) for thermal energy storage

From Journal of Building Engineering:

Thermal behavior analysis of hollow bricks filled with phase-change material (PCM)

From Energies:

FEM Applied to Building Physics: Modeling Solar Radiation and Heat Transfer of PCM Enhanced Test Cells

From Iranian Polymer Journal:

Encapsulation of phase change materials with alginate modified by nanostructured sodium carbonate and silicate

From Energy & Fuels:

Aluminium ammonium sulfate dodecahydrate with multiple additives as composite phase change materials for thermal energy storage

From Materials Today: Proceedings:

Evaluation and reduction of temperature stresses in concrete pavement by using phase changing material
Optimization of Heat Energy Based on Phase Change Materials used in Solar Collector using Taguchi Method
Experimental and Theoretical Investigations on Thermal Conductivity of the Paraffin Wax using CuO Nanoparticles

From Journal of Energy Storage:

Novel synthesis of silica coated palmitic acid nanocapsules for thermal energy storage
Recent progress in phase change materials storage containers: Geometries, design considerations and heat transfer improvement methods
Effect of phase separation and supercooling on the storage capacity in a commercial latent heat thermal energy storage: Experimental cycling of a salt hydrate PCM
Energy efficiency optimization of the waste heat recovery system with embedded phase change materials in greenhouses: A thermo-economic-environmental study
Characterization of innovative mortars with direct incorporation of phase change materials

From Applied Thermal Engineering:

A trade study of a phase change system in a stratospheric airship based on a triple gasbag concept
Experimental evaluation of structural insulated panels outfitted with phase change materials
Lattice Boltzmann simulation of melting heat transfer in a composite phase change material

From Geothermics:

Parametric modeling and simulation of low temperature energy storage for cold-climate multi-family residences using a geothermal heat pump system with integrated phase change material storage tank

From Energy:

Multi-level uncertainty optimisation on phase change materials integrated renewable systems with hybrid ventilations and active cooling
A novel solar thermal system combining with active phase-change material heat storage wall (STS-APHSW): Dynamic model, validation and thermal performance

From Advances in Energy Research:

Theoretical Modeling of Phase Change Material-Based Space Heating Using Solar Energy

From Chemical Engineering Journal:

High latent heat and recyclable form-stable phase change materials prepared via a facile self-template method

From Composites Part B: Engineering:

In situ one-step construction of monolithic silica aerogel-based composite phase change materials for thermal protection

From Solar Energy:

Effects of external insulation component on thermal performance of a Trombe wall with phase change materials

From Journal of Architectural Engineering:

Experimental and Numerical Thermal Properties Investigation of Cement-Based Materials Modified with PCM for Building Construction Use

From Energy Conversion and Management:

Experimental and numerical study on the thermal performance of ventilated roof composed with multiple phase change material (VR-MPCM)

From Construction and Building Materials:

Multi-scale analysis on thermal properties of cement-based materials containing micro-encapsulated phase change materials

From Applied Energy:

D-mannitol@silica/graphene oxide nanoencapsulated phase change material with high phase change properties and thermal reliability
Novel bio-based phase change materials with high enthalpy for thermal energy storage

From Materials Today Energy:

A detailed review on heat transfer rate, supercooling, thermal stability and reliability of nanoparticle dispersed organic phase change material for low-temperature applications

From International Journal of Thermal Sciences:

Experimental study and assessment of high-tech thermal energy storing radiant floor heating system with latent heat storage materials

From Advanced Powder Technology:

Paraffin core-polymer shell micro-encapsulated phase change materials and expanded graphite particles as an enhanced energy storage medium in heat exchangers

Research roundup: Corn oil PCM in frozen food cooling machine; portable solar box cooker; expanded graphite/1-octadecanol composite; more

Ben Welter - Saturday, March 21, 2020

From Journal of Physics:

Corn oil phase change material (PCM) in frozen food cooling machine to improve energy efficiency

From Materials Today: Proceedings:

Investigating thermal properties of Nanoparticle Dispersed Paraffin (NDP) as phase change material for thermal energy storage

From Energy:

Effects of fluctuating thermal sources on a shell-and-tube latent thermal energy storage during charging process

From Solar Energy:

Design, realization, and tests of a portable solar box cooker coupled with an erythritol-based PCM thermal energy storage
Diversiform microstructure silicon carbides stabilized stearic acid as composite phase change materials

From International Journal of Thermofluids:

Investigating the performance of a thermal energy storage unit with paraffin as phase change material, targeting buildings’ cooling needs: an experimental approach

From Journal of Cleaner Production:

Energy and exergy analysis of wind farm integrated with compressed air energy storage using multi-stage phase change material

From Powder Technology:

Effect of nano-SiC on thermal properties of expanded graphite/1-octadecanol composite materials for thermal energy storage

From Journal of Energy Storage:

A multi-objective optimal design method for thermal energy storage systems with PCM: A case study for outdoor swimming pool heating application
Reducing PV module temperature with radiation based PV module incorporating composite phase change material
Numerical investigation on the effect of fin design on the melting of phase change material in a horizontal shell and tube thermal energy storage

From Journal of Thermal Analysis and Calorimetry:

Characterization of form-stable phase-change material for solar photovoltaic cooling

From International Journal of Thermophysics:

Thermophysical Properties of a Novel Nanoencapsulated Phase Change Material

From International Journal of Heat and Mass Transfer:

Lattice Boltzmann simulation of forced convection melting of a composite phase change material with heat dissipation through an open-ended channel
High power density thermal energy storage using additively manufactured heat exchangers and phase change material

From Energies:

Evaluation of the State of Charge of a Solid/Liquid Phase Change Material in a Thermal Energy Storage Tank [pdf]
Novel Simulation Algorithm for Modeling the Hysteresis of Phase Change Materials [pdf]

From Energy & Fuels:

Novel shape-stabilized phase change materials based on paraffin/EPDM@graphene with high thermal conductivity and low leakage rate

From Polymers and Polymer Composites:

Regulating phase-change temperatures of form-stable phase-change ternary composite fibrous membranes consisting of polystyrene nanofibers and fatty acid eutectics via co-electrospinning method

From Applied Energy:

A design protocol for enhanced discharge exergy in phase change material heat battery
Fabrication of heat storage pellets composed of microencapsulated phase change material for high-temperature applications
A high-thermal-conductivity, high-durability phase-change composite using a carbon fibre sheet as a supporting matrix

From Journal of Building Engineering:

Preparation and characterization of metal-organic framework /microencapsulated phase change material composites for indoor hygrothermal control

From Indoor and Built Environment:

Numerical and experimental investigation on dynamic thermal performance of floor heating system with phase change material for thermal storage

From Applied Clay Science:

A triply synergistic method for palygorskite activation to effectively impregnate phase change materials (PCMs) for thermal energy storage

From Chemical Engineering Journal:

Lignin-fatty acid hybrid nanocapsules for scalable thermal energy storage in phase-change materials

From Construction and Building Materials:

Phase change materials for pavement applications: A review

From Carbohydrate Polymers:

Shape-stabilization of polyethylene glycol phase change materials with chitin nanofibers for applications in “smart” windows

PCM briefing: Ice Energy files for bankruptcy; Viking Cold has opening for thermal engineer

Ben Welter - Monday, February 10, 2020

Ice Energy, the Santa Barbara, Calif., company that made and distributed ice-based thermal energy storage systems, has filed for bankruptcy. The company's Ice Bear system makes ice at night when demand for electricity is low and capacity is abundant. During the day, the stored ice is used to provide cooling. Details of the Chapter 7 bankruptcy, filed in December, are sparse. The company's website is no longer active. Over the years, Ice Energy had won several major energy storage and distribution contracts with utilities, and had begun marketing a smaller version of the Ice Bear system aimed at retail customers. 

Viking Cold Solutions has an opening for a chemical/thermal engineer in Houston. The engineer will "conduct research in Thermal Science, Storage/Heat Transfer and Phase Change Materials (PCM) for low temperature applications (<10⁰C)."

Axiom Exergy has secured more than $1 million in orders for the Axiom Cloud, a software platform that helps manage energy consumption in supermarkets and cold storage facilities that use the company's PCM-powered thermal storage systems.

• The 2020 Advancements in Thermal Management conference, to be held Aug. 6-7 in Denver, has issued a call for presentations. Topics include thermal materials, thermal modeling and characterization and measurement of thermal materials. Abstracts are due Feb. 12.

EnergyNest will install a large thermal energy storage battery at a Senftenbacher brick factory in Austria. The system will temporarily store excess energy in the form of hot air from a tunnel furnace. The stored heat be converted to steam and later reused in production.

Devan Chemicals, the Belgium-based developer of finishing technologies for textiles, introduced its Tones of Cool Bio technology at the Heimtextil trade show in Frankfurt, Germany, last month. The technology "stimulates the textile to dissipate redundant heat from the body and to instantly reduce the body temperature," the company says. The phase change materials "are derived from sustainable, natural sources.

Registration is open for the 23rd Microencapsulation Industrial Convention to be held June 8-11 in Rotterdam, Netherlands.

PCM newsletter marks 5th anniversary

Ben Welter - Tuesday, January 14, 2020

The Phase Change Matters newsletter is celebrating its fifth anniversary with the publication of issue No. 224. Only a handful of folks received issue No. 1; the first issue of 2020 was e-mailed to 1,303 subscribers. More than 40,000 people from more than 160 countries visited puretemp.com last year. Here are the most-viewed newsletter posts from 2019:

1. PureTemp introduces temperature-control fabric coating (Jan. 23)

2. New dorm at Massachusetts college features 18,000+ square feet of PCM mats (Aug. 15)

3. Croda began work on new microencapsulated PCM four years ago (July 26)

4. PCM-equipped infant warming mat set for large-scale trial in Rwanda (Jan. 7)

5. Novel PCM microspheres keep new therapy pack flexible when frozen (June 15)

6. Croda adds 2 biobased phase change materials to its lineup (May 17)

7. PCM system inefficiencies blamed on design flaws, operator errors (March 25)

8. Sunamp signs agreement with Chinese heat pump maker (March 18)

9. PureTemp shows energy-saving potential in EnergyPlus simulations (Aug. 28)

10. Microtek introduces new PCM built with nextek encapsulation technology (March 11)