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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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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

Research roundup: Carbonized waste tires; cetyl palmitate/nickel foam; hydrated salt corrosion assessment; more

Ben Welter - Tuesday, January 14, 2020

From Waste Management:

Evaluation of carbonized waste tire for development of novel shape stabilized composite phase change material for thermal energy storage

From Journal of Energy Storage:

Development of polyurethane foam incorporating phase change material for thermal energy storage
Facile synthesis and thermal performance of cetyl palmitate/nickel foam composite phase change materials for thermal energy storage
Optimal sizing design and operation of electrical and thermal energy storage systems in smart buildings

From Energy Conversion and Management:

Numerical investigation of the effects of the nano-enhanced phase change materials on the thermal and electrical performance of hybrid PV/thermal systems
Thermal storage and thermal management properties of a novel ventilated mortar block integrated with phase change material for floor heating: an experimental study

From Applied Energy:

Wood-based composite phase change materials with self-cleaning superhydrophobic surface for thermal energy storage

From Renewable Energy:

Corrosion assessment of promising hydrated salts as sorption materials for thermal energy storage systems
Experimental study on latent thermal energy storage system with gradient porosity copper foam for mid-temperature solar energy application
Selection of a phase change material and its thickness for application in walls of buildings for solar-assisted steam curing of precast concrete
Experimental assessment of Phase Change Material (PCM) embedded bricks for passive conditioning in buildings

From Applied Thermal Engineering:

Analysis of energy retrofit system using latent heat storage materials applied to residential buildings considering climate impacts
Experimental and numerical simulation of phase change process for paraffin/expanded graphite/ethylene-vinyl acetate ternary composite
An experimental investigation on the evaporation of polystyrene encapsulated phase change composite material based nanofluids

From Solar Energy Materials and Solar Cells:

Lightweight mesoporous carbon fibers with interconnected graphitic walls for supports of form-stable phase change materials with enhanced thermal conductivity

From Energies:

The Effects of Fin Parameters on the Solidification of PCMs in a Fin-Enhanced Thermal Energy Storage System

From Journal of Materials Science:

Graphene aerogel-based phase changing composites for thermal energy storage systems

From Journal of Mechanical Science and Technology:

A study on development of the thermal storage type plate heat exchanger including PCM layer

From Journal of Power Sources:

Delayed liquid cooling strategy with phase change material to achieve high temperature uniformity of Li-ion battery under high-rate discharge

From Scientific Reports:

Modification of asphalt mixtures for cold regions using microencapsulated phase change materials

From ASES National Solar Conference:

A Study on the Thermal Energy Storage System Using Multiple PCMs [pdf]

From Molecules:

Assessment of Thermal Performance of Textile Materials Modified with PCM Microcapsules Using Combination of DSC and Infrared Thermography Methods

From Energy and Buildings:

Experimental study on thermal performance of a mobilized thermal energy storage system: A case study of hydrated salt latent heat storage

From Chemical Engineering Journal:

Shape-stabilized hydrated salt/paraffin composite phase change materials for advanced thermal energy storage and management

From International Journal of Heat and Mass Transfer:

A conjugate heat transfer model for unconstrained melting of macroencapsulated phase change materials subjected to external convection

Patent application: Latent-heat storage body microcapsules

Ben Welter - Monday, October 14, 2019

U.S. patent application 20190300770 (applicant National University Corp., Hokkaido University, Hokkaido, Japan):

Hokkaido microcapsule patent drawing"In the present invention, after a primary coating film is formed by boehmite treatment of the surface of a core particle in a solution comprising Al ions, a secondary coating film is formed by cooling the solution to the supersaturation temperature of the Al ions to cause deposition of a hydroxide of aluminum on the surface of the primary coating film, and an Al oxide film is formed on the surface of the core particle by heat treating the secondary coating film in an oxidizing atmosphere. Consequently, the shell is thickened by the amount of secondary coating film formed, so that the cyclic strength of the capsule can be secured and the composition change of the PCM in the production process is remarkably suppressed."

http://www.freepatentsonline.com/20190300770.pdf

Research roundup: Passive cooling in buildings; honeycomb carbon fibers; leak-free aggregates; more

Ben Welter - Monday, October 14, 2019

From Applied Energy:

Passive cooling through phase change materials in buildings. A critical study of implementation alternatives

From Applied Thermal Engineering:

Honeycomb carbon fibers strengthened composite phase change materials for superior thermal energy storage

From e-Polymers:

Fabrication and characterization of conductive microcapsule containing phase change material

From Construction and Building Materials:

Preparation and characterization of nano-SiO2/paraffin/PE wax composite shell microcapsules containing TDI for self-healing of cementitious materials
Development of leak-free phase change material aggregates
Behavior of cementitious mortars with direct incorporation of non-encapsulated phase change material after severe temperature exposure

From Advanced Functional Materials:

Engineering the Thermal Conductivity of Functional Phase‐Change Materials for Heat Energy Conversion, Storage, and Utilization

From Journal of Energy Storage:

A numerical investigation of the effects of metal foam characteristics and heating/cooling conditions on the phase change kinetic of phase change materials embedded in metal foam
Applications of combined/hybrid use of heat pipe and phase change materials in energy storage and cooling systems: A recent review
Innovative composite sorbent for thermal energy storage based on a SrBr2·6H2O filled silicone composite foam

From ACS Applied Nano Materials:

Concentrated Ag Nanoparticles in Dodecane as Phase Change Materials for Thermal Energy Storage

From Materials Research Express:

Preparation of 1-dodecanol microcapsules with cellulose nanofibers-modified melamine-formaldehyde resin as a potential phase change material

From IOP Conference Series: Earth and Environmental Science:

Optimisation of Parameters in Thermal Energy Storage System by Enhancing Heat Transfer in Phase Change Material

From International Journal of Heat and Mass Transfer:

Thermal transport properties at interface of fatty acid esters enhanced with carbon-based nanoadditives

From Journal of Solar Energy Engineering:

Using a Novel Phase Change Material-Based Cooling Tower for a Photovoltaic Module Cooling

From Solar Energy:

Experimental investigation on micro-scale phase change material based on sodium acetate trihydrate for thermal storage

From RSC Advances:

A novel forced separation method for the preparation of paraffin with excellent phase changes

From Energy Conversion and Management:

Experimental characterisation of a novel thermal energy storage based on open-cell copper foams immersed in organic phase change material

Patent application: Controlled release dual-walled microcapsules

Ben Welter - Friday, September 20, 2019

U.S. patent application 20190282989 (applicant Encapsys LLC, Appleton, Wis.):

"A method of forming dual melamine/acrylic walled microcapsules having improved physical properties and release control as well as the microcapsules formed by the process wherein the capsule wall is formed by the use of select (meth)acrylate monomers and/or oligomers and/or select self-condensing melamine resins."

http://www.freepatentsonline.com/20190282989.pdf

Patent application: Reduced permeability microcapsules

Ben Welter - Friday, September 20, 2019

U.S. patent application 20190275490 (applicant Trucapsol LLC, Bethlehem, Penn.):

Trucapsol patent drawing"Disclosed is a composition including controlled release particles, wherein each of the controlled release particles includes: (a) a core including at least one hydrophobic active ingredient; and (b) a wall at least partially surrounding the core and including: (i) an outer layer including a copolymer of polyacrylamide and polyacrylate; (ii) an intermediate layer under the outer layer and including a polyurea; (iii) an inner layer under the intermediate layer and including an acrylate copolymer; and optionally (iv) an optional outer layer above the outer layer and including a quaternary amine containing moiety, wherein the inner layer is a mesh and the controlled release particles are effective to retain the at least one hydrophobic active ingredient upon exposure to water and effective to release the at least one hydrophobic active ingredient in response to friction. A method for preparing the composition is also disclosed."

http://www.freepatentsonline.com/20190275490.pdf

Research roundup: Mesoporous silica; nanoencapsulation of oleic acid PCM; flexible crosslinking; more

Ben Welter - Friday, September 20, 2019

From International Journal of Energy Research:

Facile functionalized mesoporous silica using biomimetic method as new matrix for preparation of shape‐stabilized phase‐change material with improved enthalpy
Binary mixtures of fatty alcohols and fatty acid esters as novel solid‐liquid phase change materials

From Journal of Applied Polymer Science:

Phase change material with flexible crosslinking for thermal energy storage

From Journal of Thermal Analysis and Calorimetry:

Nanoencapsulation of oleic acid phase change material with Ag2O nanoparticles-based urea formaldehyde shell for building thermal energy storage

From Renewable Energy:

Enhanced properties of diatomite-based composite phase change materials for thermal energy storage

From Energy:

Perspectives for short-term thermal energy storage using salt hydrates for building heating
Design and construction of mesoporous silica/n-eicosane phase-change nanocomposites for supercooling depression and heat transfer enhancement
Numerical investigations on performance of phase change material Trombe wall in building

From Energy and Buildings:

Potential of energy flexible buildings: evaluation of DSM strategies using building thermal mass
Numerical analysis in a full-scale thermal energy storage tank with dual PCM capsules

From Applied Thermal Engineering:

Experimental determination and fractal modeling of the effective thermal conductivity of autoclave aerated concrete (AAC) impregnated with paraffin for improved thermal storage performance
Preparation and characterization of new nano-particle mixed as thermal storage material
Numerical investigation on integrated thermal management for a lithium-ion battery module with a composite phase change material and liquid cooling

From Chemical Engineering Journal:

Fatty Amines/Graphene Sponge Form-Stable Phase Change Material Composites with Exceptionally High Loading Rates and Energy Density for Thermal Energy Storage

From MATEC Web of Conferences:

Thermal conductivity of aerated concrete (AC) composites containing micro-encapsulated phase change materials [pdf]
Overheating mitigation in buildings: a computational exploration of the potential of phase change materials [pdf]

From Solar Energy:

Experimental study on the thermal performance of capric acid-myristyl alcohol/expanded perlite composite phase change materials for thermal energy storage

From Solar Energy Materials and Solar Cells:

Graphitization as efficient inhibitor of the carbon steel corrosion by molten binary nitrate salt for thermal energy storage at concentrated solar power
A strategy for designing microencapsulated composite phase change thermal storage materials with tunable melting temperature

From Institute of Electronics and Information Engineers 2019 Summer Conference:

Thermal Management System in Electric vehicle Battery Pack Using Phase Change Material

From Materials Chemistry and Physics:

Preparation and thermal properties of n-eicosane/nano-SiO2/expanded graphite composite phase-change material for thermal energy storage

From Sustainable Cities and Society:

Simulative optimization on energy saving performance of phase change panels with different phase transition temperatures

From Thermochimica Acta:

The stability and thermophysical properties of a thermal fluid containing surface-functionalized nanoencapsulated PCM

From International Journal of Heat and Mass Transfer:

Functionalized mesoporous silica as matrix for shape-stabilized phase change materials

From Applied Energy:

Synthesis and characterization of microencapsulated sodium sulfate decahydrate as phase change energy storage materials

From Energy Conversion and Management:

Prototype latent heat storage system with aluminum-silicon as a phase change material and a Stirling engine for electricity generation

From Journal of Solar Energy Engineering:

Experimental Investigation and Numerical Modeling of Room Temperature Control in Buildings by the Implementation of Phase Change Material in the Roof
Suitability Assessment and Experimental Characterization of Phase Change Materials for Energy Conservation in Indian Buildings

Research roundup: Microencapsulated coconut oil; mixed alkanes microcapsules; low-hydration heat cement slurry; more

Ben Welter - Tuesday, August 27, 2019

From Cellulose:

Microencapsulated organic coconut oil as a natural phase change material for thermo-regulating cellulosic fabrics

From Journal of Physics: Conference Series:

Numerical and experimental investigation of melting process in spherical PCM capsule used for low-temperature thermal energy storage systems

From Energy:

Synthesis and characterization of mixed alkanes microcapsules with phase change temperature below ice point for cryogenic thermal energy storage
Preparation of Low Hydration Heat Cement Slurry with Micro-encapsulated Thermal Control Material

From Applied Thermal Engineering:

A Three-Dimensional Numerical Investigation of a Novel Shallow Bore Ground Heat Exchanger Integrated with Phase Change Material

From Polymer Science:

Preparation of Phase Change Microcapsules with Inorganic/Polymer Hybrid Shell Through a “Two-Step” Reaction

From Solar Energy:

Improved thermal energy storage for nearly zero energy buildings with PCM integration

From Thermal Science and Engineering Progress:

A theoretical and experimental study of a TBAB salt hydrate based cold thermal energy storage in an air conditioning system

From Journal of Energy Storage:

A Review of Phase Change Materials for the Thermal Management and Isothermalisation of Lithium-Ion Cells

From Energy Conversion and Management:

Experimental performance evaluation of a novel designed phase change material integrated manifold heat pipe evacuated tube solar collector system

From Renewable and Sustainable Energy Reviews:

Corrosion mechanisms in molten salt thermal energy storage for concentrating solar power

Research roundup: Microencapsulated sugarcane wax; night ventilation; caprylic acid composite; more

Ben Welter - Friday, August 23, 2019

From Chemical Engineering:

Thermal properties and behavior of microencapsulated sugarcane wax phase change material

From Renewable Energy:

Experimental study on the influence of preparation parameters on strengthening stability of phase change materials (PCMs)
Climatic and seasonal suitability of phase change materials coupled with night ventilation for office buildings in Western China

From Applied Energy:

Thermal energy storage (TES) with phase change materials (PCM) in solar power plants (CSP). Concept and plant performance

From Materials Research Express:

Preparation and thermal characteristics of caprylic acid based composite as phase change material for thermal energy storage

From Energy Conversion and Management:

Thermodynamic assessment of an integrated renewable energy multigeneration system including ammonia as hydrogen carrier and phase change material energy storage

From Russian Journal of General Chemistry:

Symmetrical Fatty Dialkyl Carbonates as Potential Green Phase Change Materials: Synthesis and Characterisation

From Journal of Physics: Conference Series:

An Integrated Energy Power Generation with Energy Storage System

From Safety in Extreme Environments:

Review of energy storage technologies in harsh environment

From Materials Today: Proceedings:

Review on performance assessment of phase change materials in buildings for thermal management through passive approach

From International Journal of Environmental Science and Technology:

Sunlight-driven organic phase change material-embedded nanofiller for latent heat solar energy storage

From International Journal of Energy Research:

Application of a ground source heat pump system with PCM‐embedded radiant wall heating for buildings

From Industrial & Engineering Chemistry Research:

Theoretical Evaluation of an Organic Phase Change Material (PCM)-Inserted Dual-Functional Adsorbent for the Recovery of Heat of Adsorption

From Chemical Engineering Journal:

Flame-retardancy and thermal properties of a novel phosphorus-modified PCM for thermal energy storage

From Solar Energy:

Numerical study on charging characteristics of heat pipe-assisted cylindrical capsule for enhancing latent thermal energy storage

From Renewable Energy and Environmental Sustainability:

Use of phase change materials in concrete: current challenges

From Solar Energy Materials and Solar Cells:

Ambient pressure dried flexible silica aerogel for construction of monolithic shape-stabilized phase change materials

From Applied Thermal Engineering:

Preparation and properties of phase change temperature-tuned composite phase change material based on sodium acetate trihydrate–urea/fumed silica for radiant floor heating system

From Sustainable Cities and Societies:

Cardinal orientation and melting temperature effects for PCM-enhanced light-walls in different climates

From Journal of Thermal Analysis and Calorimetry:

Phase change materials (PCMs) for improving solar still productivity: a review

Patent application: Ice-based thermal energy storage device

Ben Welter - Thursday, August 22, 2019

U.S. patent application 20190257593 (applicant Boreales Energy, Hérouville-Saint-Clair, France):

"Disclosed is a heat exchange device including a first thermally conductive tube that is hollow over its length, a second thermally conductive tube that is hollow over its length, and including a thermally conductive fin, in which the fin extends lengthwise along the first tube, the fin extends lengthwise along the second tube and the fin extends width-wise between the first tube and the second tube. ... The invention is open to industrial application or useful in the field of heat accumulators, transferring heat between two phase change materials and in particular for storing energy in the form of ice from freshwater or saltwater or brackish water."

http://www.freepatentsonline.com/20190257593.pdf