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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.




Research roundup: Dynamic behavior of PCM-27; Al2O3, SiO2 and TiO2 nano-inclusions; coacervation microencapsulation; more

Ben Welter - Tuesday, August 14, 2018

From International Journal of Thermal Sciences:

An experimental and a numerical analysis of the dynamic behavior of PCM-27 included inside a vertical enclosure: Application in space heating purposes

From Journal of Molecular Liquids:

Thermal conductivity enhancement in organic phase change material (phenol-water system) upon addition of Al2O3, SiO2 and TiO2 nano-inclusions

From Applied Thermal Engineering:

Experimental and numerical investigations of nano-additives enhanced paraffin in a shell-and-tube heat exchanger: A comparative study
Three-dimensional numerical and experimental investigation of the behavior of solar salts within thermal storage devices during phase change

From Energy Conversion and Management:

Formulation of a model predictive control algorithm to enhance the performance of a latent heat solar thermal system
Performance assessment of a new hydrogen cooled prismatic battery pack arrangement for hydrogen hybrid electric vehicles

From Carbohydrate Polymers:

Chitosan composite microencapsulated comb-like polymeric phase change material via coacervation microencapsulation

From Renewable Energy:

Analytical Considerations on Optimization of Cascaded Heat Transfer Process for Thermal Storage System with Principles of Thermodynamics

From Proceedings of Microscopy & Microanalysis 2018:

In-Situ TEM Observation of Crystallization in Phase-Change Material

From International Journal of Energy Research:

PCM briefing: Shipping costs rise for chemical companies; Inventure to build plant in China

Ben Welter - Saturday, August 11, 2018

Viking Cold Solutions founder and board chairman Paul Robbins, who retired as president at Caribbean Shipping Services in July, says he plans to resume a more active role in the day-to-day operations at Viking. The Houston company makes TES systems that pair phase change material with intelligent controls and remote energy-monitoring software to reduce commercial refrigeration costs.  

Chemical Week reports that shipping costs are on the rise for chemical companies as capacity tightens and truck traffic shifts to railroads.  

Inventure Renewables of Tuscaloosa, Ala., is partnering with Wilmar International and Desmet Ballestra Group on a new manufacturing plant in China's Jiangsu province, the Birmingham Business Journal reports. Construction is expected to begin in 2019. The plant will use Inventure’s soap carbonate technology to convert low-value processing residues into uncontaminated free fatty acids.

Maurizio ZaglioMaurizio Zaglio‎, right, international business development manager at Sunamp Ltd., was in Hangzhou, China, this week to present the company's new products at the 2018 China Heat Pump Annual Conference.

• New from Research and Markets: "Phase Change Materials (PCMs) - A Global Market Overview"

ARPA-E has issued a funding opportunity of up to $35 million for the High Intensity Thermal Exchange through Materials and Manufacturing Processes program, to develop new approaches and technologies for the design and manufacture of high-temperature, high-pressure, and highly compact heat exchangers. 

• The American Chemistry Council confirmed this week that high-density polyethylene (HDPE) is on the list of U.S. petrochemicals and plastics targeted for $16 billion in retaliatory tariffs from China. "Prospects of trade war are eroding business confidence from the Tax Cuts and Jobs Act," says the ACC's Kevin Swift. The U.S. economy is expected to grow by 2.4 percent in 2019, Morningstar reports, but economists have cut the average forecast for 2020 from 2 percent to 1.8 percent. 

Research roundup: Octadecanol/expanded perlite; PV/T system design; macroencapsulated PCM for pavement; more

Ben Welter - Friday, August 10, 2018

From Renewable Energy:

Experimental investigation on thermal properties and thermal performance enhancement of octadecanol/expanded perlite form stable phase change materials for efficient thermal energy storage
Effect of graphite mass concentrations in a mixture of graphite nanoparticles and paraffin wax as hybrid storage materials on performances of solar still

From Renewable and Sustainable Energy Reviews:

A review on recent development for the design and packaging of hybrid photovoltaic/thermal (PV/T) solar systems

From Materials:

Mechanical and Thermal Performance of Macro-Encapsulated Phase Change Materials for Pavement Application

From International Journal of Heat and Mass Transfer:

Heat transfer behavior of elemental sulfur for low temperature thermal energy storage applications
A novel method for determining the melting point, fusion latent heat, specific heat capacity and thermal conductivity of phase change materials
Effect of microstructure on melting in metal-foam/paraffin composite phase change materials

From Chemical Engineering Journal:

Flexible phase change materials for thermal storage and temperature control

From Construction and Building Materials:

Experimental investigation of thermal and mechanical properties of magnesium oxychloride cement with form-stable phase change material

From Solar Energy:

New insights into the corrosion mechanism between molten nitrate salts and ceramic materials for packed bed thermocline systems: A case study for steel slag and solar salt

PCM briefing: va-Q-tec opens Uruguay office; U.S. Army issues RFQ for 'cooling radio vest'

Ben Welter - Monday, August 06, 2018

• A bipartisan bill promoting innovation in sustainable chemistry was reintroduced in the U.S. Senate last week. The bill is sponsored by Susan Collins, R-Maine, and Chris Coons, D-Del. Collins said the legislation "would create a coordinated national effort to support research and development in the sustainable chemistry field; provide grants, training, and educational opportunities for scientists and engineers; and support American jobs by maintaining our nation’s scientific leadership." 

• PCM maker va-Q-tec AG is expanding its international presence with a new Latin American head office and operations facility in Montevideo, Uruguay. The new site will function as a hub for va-Q-tec’s pharma shipper rental service.

Sener and Acciona Industrial have begun the salt melting process at the 100MW Kathu concentrated solar power plant in South Africa's Northern Cape Province. The molten salt will be used to store heat from the solar field for up to 4.5 hours. The heat can be recovered later to produce steam and generate electricity.

• In response to a U.S. threat to raise a proposed tariff rate on $200 billion worth of Chinese goods to 25 percent, China has threatened to impose tariffs on $60 billion in U.S. goods.

• The U.S. Army is seeking proposals for a "cooling radio vest" that uses phase change material to keep the wearer at a comfortable 72 degrees F. The vest must include two radio pockets, a cell phone pocket, two utility pockets and space for a hydration panel. The list of requirements also specifies: "Cooling elements are a non-gel. Non ice mil spec aluminum packet consisting of a phase change material measuring 4.5" x 2.6" x 0.3." The deadline for proposals is Aug. 13. One other detail: Just 22 units are needed. 

Research roundup: Silicon carbide for battery thermal management; Stefan moving boundary models; alkali nitrate/nitrite salts; more

Ben Welter - Tuesday, July 24, 2018

From Renewable Energy:

Using Renewables Coupled with Thermal Energy Storage to Reduce Natural Gas Consumption in Higher Temperature Commercial/Industrial Applications

From Solar Energy:

Development of a solar thermal storage cum cooking device using salt hydrate

From Applied Energy:

One-step fabrication of fatty acids/nano copper/polyester shape-stable composite phase change material for thermal energy management and storage
Palmitic acid/polyvinyl butyral/expanded graphite composites as form-stable phase change materials for solar thermal energy storage

From Chinese Journal of Chemical Engineering:

Preparation and phase change performance of Na2HPO4·12H2O@poly(lactic acid) capsules for thermal energy storage

From Applied Thermal Engineering:

Thermal performance of sodium acetate trihydrate based composite phase change material for thermal energy storage
Performance improvement and energy consumption reduction in refrigeration systems using phase change material (PCM)
A thermal conductive composite phase change material with enhanced volume resistivity by introducing silicon carbide for battery thermal management
Numerical and Experimental study on the performance of a new two -layered high-temperature packed-bed thermal energy storage system with changed-diameter macro-encapsulation capsule

From Colloids and Surfaces A: Physicochemical and Engineering Aspects:

Green Nano-encapsulation Technique for Preparation of Phase Change Nanofibers Mats with Core-Sheath Structure
From International Journal of Thermal Sciences:

Analytical and numerical analysis of PCM solidification inside a rectangular finned container with time-dependent boundary condition

From Construction and Building Materials:

Elaboration and properties of a composite bio-based PCM for an application in building envelopes

From International Journal of Heat and Mass Transfer:

Lorentz forces effect on NEPCM heat transfer during solidification in a porous energy storage system
A translucent honeycomb solar collector and thermal storage module for building façades

PCM briefing: New EU energy standard takes effect; new research on inorganic phase change material

Ben Welter - Monday, July 09, 2018

• The new version of the European Union's Energy Performance of Buildings Directive takes effect July 9. The directive is the EU's main legislative instrument designed to promote improved energy performance of buildings. Member states will have 20 months to transpose the new elements into national law.

• A proposal to use microencapsulated phase change material to help motor vehicles run smoothly in extreme cold has won the ClimateLaunchpad competition in Azerbaijan. A team of chemical engineering students from Baku Higher Oil School developed the concept. The team will represent Azerbaijan at the ClimateLaunchpad finals in Scotland Nov. 1-2, 2018.

• New from Research Reports: "2018 Global Inorganic PCMs Industry Report – History, Present and Future"

PCM briefing: Neck collar uses Outlast to keep wearer cool; thermally responsive bandage heals wounds quickly

Ben Welter - Monday, June 25, 2018

A new neck collar designed for people living with motor neurone disease features Outlast phase change technology to keep the wearer cool. The Heads Up collar supports the collection of small muscles in the neck that are vulnerable to the wasting effects of the disease.

• A Northwestern University team has developed a thermally responsive bandage that quickly heals painful, hard-to-treat sores in people with diabetes. The bandage features a hydrogel that rapidly solidifies when exposed to body temperature, conforming to the shape of the wound.

• In the short term, analysts say crude palm oil prices have likely hit rock bottom. But a Rabobank analyst is projecting reduced production - and higher prices - from 2022 to 2025. 

•  A call for papers has been issued for the Advanced Automotive Battery Conference Europe, to be held in Strasbourg, France, Jan. 27-31, 2019. "Thermal modeling" and "preventing thermal runaway" are among the topics. The deadline for priority consideration is June 29.

Emily Liu, a professor at Rensselaer Polytechnic Institute, was recently selected by the U.S. Department of Energy's Solar Energy Technologies Office to receive a $1.8 million award to study high-temperature molten-salt properties and corrosion mechanisms.

Dr. Robert Brookins, interim CEO at Alexium International Group Ltd., will present an hourlong webinar, "Phase Change Materials: How Can They Help Set Your Company Apart," on June 28. The free event is sponsored by the Industrial Fabrics Association International.  

• Swedish solar company Azelio has launched a demonstrator of its solar energy storage technology. The system uses an aluminum alloy as a thermal storage material. 

In a new directive, the European Commission is calling for at least 32 percent of total EU energy use to come from renewable sources by 2030. The directive, which will require the formal approval of the European Parliament, sets specific annual targets for cooling and heating installations. 

• The agenda is taking shape for the 13th International Conference on Advanced Building Skins, to be held Oct. 1-2 in Bern, Switzerland. Topics include "Energy buffering with phase change materials" and "Thermal performance of phase change materials for the building skin."

Va-Q-tec AG is expanding its Kölleda location in Thuringia, Germany. The company manufactures vacuum isolation panels, phase change materials and passive thermal packaging systems at two plants there.

• MIT Technology Review reports that Alphabet Inc. (Google's parent company) appears to be in talks to spin out Project Malta, a molten-salt energy storage project, in a transaction involving Breakthrough Energy Ventures, Bill Gates’ $1 billion investment fund.

Research roundup: Natural convection heat transfer; simulation of hysteresis effects; PCM in roofs; more

Ben Welter - Wednesday, June 20, 2018

From Energy Conversion and Management:

Effect of using nanoparticles on the performance of thermal energy storage of phase change material coupled with air-conditioning unit
Numerical study on the effect of non-uniform magnetic fields on melting and solidification characteristics of NEPCMs in an annulus enclosure
Solidification behavior of binary eutectic phase change material in a vertical finned thermal storage system dispersed with graphene nano-plates

From International Communications in Heat and Mass Transfer:

A method to evaluate natural convection heat transfer in microencapsulated phase change material (MPCM) slurry: An experimental study
Dynamic of plumes and scaling during the melting of a Phase Change Material heated from below

From Applied Thermal Engineering:

Experimental investigation of the thermal performance of heat pipe assisted phase change material for battery thermal management system
Low-temperature macro-encapsulated phase change material based thermal energy storage system without air void space design

From Energy and Buildings:

Modeling and experimental validation of an algorithm for simulation of hysteresis effects in phase change materials for building components
Thermal performance and numerical simulation of geopolymer concrete containing different types of thermoregulating materials for passive building applications

From Solar Energy:

How to enhance thermal energy storage effect of PCM in roofs with varying solar reflectance: Experimental and numerical assessment of a new roof system for passive cooling in different climate conditions

From Energy:

A facile approach to synthesize microencapsulated phase change materials embedded with silver nanoparticle for both thermal energy storage and antimicrobial purpose

From Reference Module in Materials Science and Materials Engineering:

Materials, Design and Development of Latent Heat Storage Systems for Medium and Large-Scale Applications: Issues and Challenges

From Physica A: Statistical Mechanics and its Applications:

Melting process in porous media around two hot cylinders: Numerical study using the lattice Boltzmann method

From Solar Energy Materials and Solar Cells:

Synthesis and characterization of chain-extended and branched polyurethane copolymers as form stable phase change materials for solar thermal conversion storage

From Construction and Building Materials:

Investigation of different materials for macroencapsulation of salt hydrate phase change materials for building purposes

From Journal of Energy Storage:

CFD thermal energy storage enhancement of PCM filling a cylindrical cavity equipped with submerged heating sources
Performance analysis of industrial PCM heat storage lab prototype

PCM briefing: DowDuPont shifts to small-scale R&D projects; Viking Cold Solutions has opening for business development manager

Ben Welter - Monday, June 04, 2018

Arktek vaccine carrierWired takes a close look at Arktek, "the Ebola vaccine's high-tech thermos." The World Health Organization is using the PCM-equipped container to transport the temperature-sensitive vaccine to wherever it's needed, whatever the conditions. The container is designed keep payloads colder than -65 C for five days.

• With an eye toward increased profits, CEO Edward Breen says DowDuPont is moving away from large-scale R&D projects in favor of less risky initiatives of $30 million or less.

Viking Cold Solutions has posted an opening for a business development manager for the Northeastern United States.

ASHRAE has published a new standard describing a methodology to apply building energy modeling throughout the design process. ASHRAE Standard 209-2018 defines minimum requirements for providing energy design assistance using building energy simulation and analysis.

Pelican BioThermal is opening its first Canadian drop point for the Credo on Demand rental program. The new drop point, at ATS Healthcare headquarters in Toronto, offers customers an additional location to return temperature-control pallet and bulk shippers.