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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: Fresh air cooling systems; CuO-nanoparticle concentration; Stefan problems and solutions; more

Ben Welter - Friday, January 05, 2018

Energy efficiency of PCM integrated in fresh air cooling systems in different climatic conditions [Applied Energy]

Effect of temperature and CuO-nanoparticle concentration on the thermal conductivity and viscosity of an organic phase-change material [International Journal of Heat and Mass Transfer]

Stefan problems for moving phase change materials and multiple solutions [International Journal of Thermal Sciences]

Thermodynamic analysis of directionally influenced phase change material embedded building walls [International Journal of Thermal Sciences]

The role of vegetable oil in water based phase change materials for medium temperature refrigeration [Journal of Energy Storage]

Performance analysis of incorporating phase change materials in asphalt concrete pavements [Construction and Building Materials]

Electric vehicles batteries thermal management systems employing phase change materials [Journal of Power Sources]

Patent application: Thermal battery with encapsulated PCM

Ben Welter - Wednesday, January 03, 2018

U.S. patent application 20170370655 (applicant Valeo Systems Thermiques, Le Mesnil St. Denis, France):

"The present invention relates to a thermal battery comprising an enclosure comprising a fluid inlet and outlet and comprising within it an encapsulated phase-change material in the form of at least one tube, at least one tube being wound in a spiral within the enclosure."

http://www.freepatentsonline.com/20170370655.pdf

Research roundup: Eutectic fatty acids; review of automotive applications; expanded graphite composites; more

Ben Welter - Wednesday, January 03, 2018

Prediction of the Properties of Eutectic Fatty Acid Phase Change Materials [Thermochimica Acta]

Phase-change materials (PCM) for automotive applications: A review [Applied Thermal Engineering]

A polymer-coated calcium chloride hexahydrate/expanded graphite composite phase change material with enhanced thermal reliability and good applicability [Composites Science and Technology]

Synthesis and characterization of beeswax-tetradecanol-carbon fiber/expanded perlite form-stable composite phase change material for solar energy storage [Composites Part A: Applied Science and Manufacturing]

An energy-efficient composite by using expanded graphite stabilized paraffin as phase change material [Composites Part A: Applied Science and Manufacturing]

Synthesis and characterization of PEG/ZSM-5 composite phase change materials for latent heat storage [Renewable Energy]

Fabrication and characteristics of composite phase change material based on Ba(OH)2·8H2O for thermal energy storage [Solar Energy Materials and Solar Cells]

Silica fume/capric acid-palmitic acid composite phase change material doped with CNTs for thermal energy storage [Solar Energy Materials and Solar Cells]

Hybridizing graphene aerogel into three-dimensional graphene foam for high-performance composite phase change materials [Energy Storage Materials]

Phase Change in Spiral Coil Heat Storage Systems [Sustainable Cities and Society]

Thermal management performance of phase change materials with different thermal conductivities for Li-ion battery packs operated at low temperatures [Energy]

Geocooling with integrated PCM thermal energy storage in a Mediterranean climate [Energy]

Patent application: Batteries with thermal management

Ben Welter - Friday, December 15, 2017

U.S. patent application 20170358831 (applicant Pure Watercraft Inc., Seattle, Wash.):

"A battery pack assembly includes: a battery cell; a flat heat pipe, coupled to the battery cell, configured to transfer thermal energy to or from the battery cell; and a thermal electric cooler, coupled to the flat heat pipe, configured to cool the battery cell based on reducing the thermal energy through the flat heat pipe. ... The battery module can further include thermal storage units (e.g., PCM that melt and solidify at a phase change temperature; thermal energy can be absorbed or released based on the change in physical states of the materials) connected to the battery cells."

http://www.freepatentsonline.com/20170358831.pdf

Research roundup: Direct steam generation solar plants; d-mannitol-copper oxide nanocomposites; modified carbon nanotubes; more

Ben Welter - Wednesday, December 06, 2017

Thermal energy storage evaluation in direct steam generation solar plants [Solar Energy]

Potential of cascaded phase change materials in enhancing the performance of solar domestic hot water systems [Solar Energy]

Study of thermo-physical properties and cycling stability of d-Mannitol-copper oxide nanocomposites as phase change materials [Journal of Energy Storage]

Properties Enhancement of Phase-change Materials via Silica and Al Honeycomb Panels for the Thermal Management of LiFeO4 Batteries [Applied Thermal Engineering]

Experimental Investigation and Mathematical Modelling of Thermal Performance Characteristics of Textiles Incorporating Phase Change Materials [Environmental Engineering, 10th International Conference]

Thermal storage of solar energy [Physical Rendering]

Studies on the inward spherical solidification of a phase change material dispersed with macro particles [Journal of Energy Storage]

Review of latent heat thermal energy storage for improved material stability and effective load management [Journal of Energy Storage]

The effects of modified carbon nanotubes on the thermal properties of erythritol as phase change materials [Energy Conversion and Management]

Experimental study on the cooling charge and discharge characteristics of a PCM based fin-tube thermal energy storage exchanger [Procedia Engineering]

Energy Saving Potential of PCMs in Buildings under Future Climate Conditions [pdf] [Applied Sciences]

Experimental study of carbon fiber reinforced alkali-activated slag composites with micro-encapsulated PCM for energy storage [Construction and Building Materials]

Research roundup: TES in Toronto high-rises; rotary desiccant cooling systems; natural convection characterization; more

Ben Welter - Tuesday, October 24, 2017

Experimental investigation of latent thermal energy storage in high-rise residential buildings in Toronto [Energy Procedia]

Study on the Performance of Heat Storage and Heat Release of Water Storage Tank with PCMs [Energy and Buildings]

Design of effective fins for fast PCM melting and solidification in shell-and-tube latent heat thermal energy storage through topology optimization [Applied Energy]

Integrating photovoltaic thermal collectors and thermal energy storage systems using phase change materials with rotary desiccant cooling systems [Sustainable Cities and Society]

Development of thermal energy storage cementitious composites (TESC) containing a novel paraffin/hydrophobic expanded perlite composite phase change material [Solar Energy]

Experimental analysis of solar photovoltaic unit integrated with free cool thermal energy storage system [Solar Energy]

Natural convection characterization during melting of phase change materials: Development of a simplified front tracking method [Solar Energy]

Thermal behavior of latent thermal energy storage unit using two phase change materials: Effects of HTF inlet temperature [Case Studies in Thermal Engineering]

Experimental Investigation of a New Passive Thermal Management System for a Li-Ion Battery Pack Using Phase Change Composite Material [Electrochimica Acta]

Research roundup: Carbon-based nanoenhanced PCM; copper-powder-sintered frame/paraffin form stable PCM; thermoelectric harvester; more

Ben Welter - Monday, October 23, 2017

From Renewable and Sustainable Energy Reviews:

Experimental set-up for testing active and passive systems for energy savings in buildings – Lessons learnt
Review on thermal conductivity enhancement, thermal properties and applications of phase change materials in thermal energy storage

From Journal of Energy Storage:

Preparation and thermal performance of methyl palmitate and lauric acid eutectic mixture as phase change material (PCM)

From Applied Thermal Engineering:

A novel heat transfer model of a phase change material using in solar power plant

From Energy Procedia:

Experimental investigation of flow rate impact on thermal accumulation system with PCM

From Energy Conversion and Management:

Experimental and numerical investigation on the performance of carbon-based nanoenhanced phase change materials for thermal management applications

From International Journal of Thermal Sciences:

Thermal management of lithium ion batteries using graphene coated nickel foam saturated with phase change materials 

From Applied Energy:

Preparation of novel copper-powder-sintered frame/paraffin form-stable phase change materials with extremely high thermal conductivity
Experimental investigations of charging/melting cycles of paraffin in a novel shell and tube with longitudinal fins based heat storage design solution for domestic and industrial applications
A novel thermoelectric harvester based on high-performance phase change material for space application

From Sustainable Cities and Society:

Experimental Investigation of Phase Change Materials for Insulation of Residential Buildings
A comparison of battery and phase change coolth storage in a PV cooling system under different climates

Research roundup: Influence of nanoparticle morphology; battery thermal management; concrete pavement; more

Ben Welter - Wednesday, September 06, 2017

Influence of nanoparticle morphology and its dispersion ability regarding thermal properties of water used as Phase Change Material [Applied Thermal Engineering]

The optimal allocation of the PCM within a composite wall for surface temperature and heat flux reduction: an experimental approach [Applied Thermal Engineering]

An innovative practical battery thermal management system based on phase change materials: Numerical and experimental investigations [Applied Thermal Engineering]

Using phase change material in under floor heating [Energy Procedia]

Incorporating phase change materials in concrete pavement to melt snow and ice [Cement and Concrete Composites]

Dynamics of phase change in a vertical PCM capsule in the presence of radiation at high temperatures [Applied Energy]

Experimental study on thermal performance of phase change material passive and active combined using for building application in winter [Applied Energy]

Thermodynamics behavior of phase change latent heat materials in micro-/nanoconfined spaces for thermal storage and applications [Renewable and Sustainable Energy Reviews]

Advancement in phase change materials for thermal energy storage applications [Solar Energy Materials and Solar Cells]

Study on solidification process of sodium acetate trihydrate for seasonal solar thermal energy storage [Solar Energy Materials and Solar Cells]

Research roundup: Stearyl alcohol/ HDPE /expanded graphite composite PCM; perlite-based PCM wallboard; more

Ben Welter - Thursday, August 17, 2017

Improved thermal properties of stearyl alcohol/high density polyethylene/expanded graphite composite phase change materials for building thermal energy storage [Energy and Buildings]

Development and thermal performance of an expanded perlite-based phase change material wallboard for passive cooling in building [Energy and Buildings]

Numerical and experimental investigation of an insulation layer with phase change materials (PCMs) [Energy and Buildings]

Polyurethane foams with microencapsulated phase change material: Comparative analysis of thermal conductivity characterization approaches [Energy and Buildings]

Flammability assessment of Phase Change Material wall lining and insulation materials with different weight fractions [Energy and Buildings]

Thermal analysis of nanoparticle-enhanced phase change material solidification in a rectangular latent heat storage unit including natural convection [Energy and Buildings]

A portable solar-powered air-cooling system based on phase-change materials for a vehicle cabin [Energy Conversion and Management]

Thermal performance and economic evaluation of a newly developed phase change material for effective building encapsulation [Energy Conversion and Management]

Fabrication of three-dimensional metal-graphene network phase change composite for high thermal conductivity and suppressed subcooling phenomena [Energy Conversion and Management]

Researches of composite phase change material cooling/resistance wire preheating coupling system of a designed 18650-type battery module [Applied Thermal Engineering]

The impact of the heating/cooling rate on the thermoregulating properties of textile materials modified with PCM microcapsules [Applied Thermal Engineering]

Fatty acids/1-dodecanol binary eutectic phase change materials for low temperature solar thermal applications: Design, development and thermal analysis [Solar Energy]

An Experimental Evaluation of Direct Flow Evacuated Tube Solar Collector Integrated with Phase Change Material [Energy]

Heat capacities of some sugar alcohols as phase change materials for thermal energy storage applications [Journal of Chemical Thermodynamics]

Patent application: Systems and methods for thermal battery control

Ben Welter - Thursday, August 03, 2017

U.S. patent application 20170210196 (applicant Ford Global Technologies, Dearborn, Mich.):

"Methods and system for operating a thermal storage device of a vehicle system are provided. In one example, a method comprises estimating a temperature of a thermal battery after the battery and coolant included therein have reached thermal equilibrium, and determining a state of charge of the battery based on the estimated temperature and one or more chemical properties of two phase change materials included within the battery. Specifically, the thermal battery may include two phase change materials with different melting points for providing thermal energy to warm coolant in a vehicle coolant system."

http://www.freepatentsonline.com/20170210196.pdf