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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: 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:

Research roundup: Alum/expanded graphite composite; geopolymeric mortars; flexible PCMs; more

Ben Welter - Monday, July 30, 2018

From Energy:

Experimental investigations of Alum/expanded graphite composite phase change material for thermal energy storage and its compatibility with metals

From International Journal of Thermal Sciences:

Numerical study on the effect of phase change materials on heat transfer in asphalt concrete

From The Open Construction & Building Technology Journal:

Thermal Performance of Resource-Efficient Geopolymeric Mortars Containing Phase Change Materials

From Chemical Engineering Journal:

Flexible Phase Change Materials for Thermal Storage and Temperature Control

From Journal of Materials Chemistry A:

Nanoconfinement of phase change materials within carbon aerogels: phase transition behaviours and photo-to-thermal energy storage

From Materiales de Construcción:

Identification of best available thermal energy storage compounds for low-to-moderate temperature storage applications in buildings

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

Research roundup: Heat transfer enhancement of PCMs; CuO/palmitic acid composite; cooking applications; more

Ben Welter - Tuesday, June 12, 2018

From Materials Today: Proceedings:

Investigation of thermal performance by applying a solar chimney with PCM towards the natural ventilation of model house under Climate of Thailand
Study of Solar– PCM Walls for domestic hot water production under the tropical climate of Thailand
Improved Performance of Composite Phase Change Material for Thermal Energy Storage
Experimental investigation on freezing/melting characteristics of two different phase change materials
Review on Heat Transfer Enhancement of Phase Change Materials (PCMs)
Experimental Investigation of Improved Thermal Characteristics of Al2O3/Barium Hydroxide Octa Hydrate as Phase Change Materials (PCMs)
Improved Thermal Energy Storage Behavior of CuO/Palmitic acid Composite as Phase Change Material

From Applied Thermal Engineering:

An Experimental Investigation of the Melting Process of a Bio-based Nano-PCM filled Vertical Cylindrical Thermal Energy Storage System

From International Journal of Heat and Mass Transfer:

Experimental investigation of the effects of mass fraction and temperature on the viscosity of microencapsulated PCM slurry

From Journal of the Brazilian Society of Mechanical Sciences and Engineering:

Rapid thermal cycling of three phase change materials (PCMs) for cooking applications

From 3rd Thermal and Fluids Engineering Conference:

Use of Wood/Phase Change Material Composite in the Building Envelope for Building Thermal Control and Energy Savings

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. 

Phase change composite shows potential to double AC compressor efficiency

Ben Welter - Friday, June 01, 2018

Using a phase change composite material, researchers at the University of Illinois at Chicago have developed a novel thermal energy storage system that has the potential to downsize conventional air-conditioner compressors by 50 percent and double compressor efficiency during off- and mid-peak hours.

The research is described in a paper titled “Design and optimization of a hybrid air conditioning system with thermal energy storage using phase change composite,” recently accepted for publication in Energy Conversion and Management. One of the authors, Said Al-Hallaj, a research professor of chemical engineering at UI-Chicago and CEO of AllCell Technologies LLC, answered a few questions by e-mail.

Q: Who led the research team, and how long did the project take?

A: “It is an ongoing project since 2015 at the University of Illinois at Chicago, where I work as a Research Professor of Chemical Engineering, and part of the PhD thesis for my graduate student Ahmed Aljehani.”

Q: Who funded the project? 

A: “Ahmed has a scholarship from his government in Saudi Arabia and we get technical support from our industry partners NETenergy and AllCell Technologies LLC.”

Q: Who supplied the PCM?

A: “I believe it is n-tetradecane (C14H30) PCM that we bought from a distributor and not sure about actual source.”

28 slabs of phase change composite materialQ: What is its peak melting point? 

A: “4-6 degrees Celsius.”

Q: What is its thermal storage capacity?

A: “180 kJ/kg (78% PCM, 22% graphite).”

Q: Describe the benchtop PCC/TES system size, components and functionality.

A: “The actual 4 kWh PCC-TES structure is made of 28 slabs of PCC [right]. The whole PCC-TES structure is thermally insulated with building insulation materials. Each slab represents a graphite structure that has been soaked into n-tetradecane for at least 24 h until impregnated with n-tetradecane. The slabs are numbered from top to bottom; top being number 1. The second component is the copper tubes or the copper coils, which pass back and forth in between the 28 slabs. The copper tubes enter the PCC-TES structure from the top and exits from the bottom of the structure.”

Q: Is the concept intended mainly for commercial AC systems, or could it be adapted for residential use?

A: “It should work for both, but commercial AC applications are more economically beneficial due to rate structure and peak demand requirements.”

Q: What are the next steps in developing this concept?

A: “NETenergy, our technology commercialization partner, is partnering with National Renewable Energy Laboratory and a major OEM to build and test a full-scale prototype at NREL facilities in the next year or so.”


https://www.sciencedirect.com/science/article/pii/S019689041830517X

Research roundup: Nanofluid-based PCMs; microencapsulation of n-alkanes; finned solar PV PCM; more

Ben Welter - Thursday, May 31, 2018

From Chemical Engineering Journal:

Glycolysis of Advanced Polyurethanes Composites containing Thermoregulating Microcapsules

From Applied Thermal Engineering:
From Applied Energy:

From International Journal of Thermal Sciences:

From Chemical Engineering Science:

Research roundup: Thermoelectric generator system; solar chimney; novel thermal management system for lithium-ion battery pack; more

Ben Welter - Friday, May 18, 2018

From Energy:

Protection and Thermal Management of Thermoelectric Generator System Using Phase Change Materials: An Experimental Investigation
Performance analysis of a novel thermal management system with composite phase change material for a lithium-ion battery pack

From Solar Energy:

Efficient energy storage technologies for photovoltaic systems
The experimental appraisement of the effect of energy storage on the performance of solar chimney using phase change material

From Applied Thermal Engineering:

Improving thermal management of electronic apparatus with paraffin (PA)/expanded graphite (EG)/graphene (GN) composite material
Experimental exploration of incorporating form-stable hydrate salt phase change materials into cement mortar for thermal energy storage

From Thermal Science and Engineering Progress:

Role of Metallic Foam in Heat Storage in the Presence of Nanofluid and MicroEncapsulated Phase Change Material

From International Journal of Heat and Mass Transfer:

Numerical investigation of thermal and optical performance of window units filled with nanoparticle enhanced PCM

From Applied Energy:

Cost estimation and sensitivity analysis of a latent thermal energy storage system for supplementary cooling of air cooled condensers
Influence of design on performance of a latent heat storage system at high temperatures

From Energy Conversion and Management:

Preparation and investigation of distinct and shape stable paraffin/SiO2 composite PCM nanospheres

From Energy and Buildings:

Parametric Analysis of Using PCM Walls for Heating Loads Reduction

Research roundup: Comb-like polymeric phase change materials; energy-storing concrete; building-integrated solar thermal; more

Ben Welter - Wednesday, May 09, 2018

From Renewable and Sustainable Energy Reviews:

Thermal and electrical management of photovoltaic panels using phase change materials – A review

From Energy Conversion and Management:

Thermal performance and shape-stabilization of comb-like polymeric phase change materials enhanced by octadecylamine-functionalized graphene oxide

From Energy:

Front tracking in modelling of latent heat thermal energy storage: Assessment of accuracy and efficiency, benchmarking and GPU-based acceleration

From Construction and Building Materials:

Mechanical behavior, energy-storing properties and thermal reliability of phase-changing energy-storing concrete

From Journal of Cleaner Production:

Building-integrated solar thermal system with/without phase change material: Life cycle assessment based on ReCiPe, USEtox and ecological footprint

From Case Studies in Thermal Engineering:

Magnetically stirring enhanced thermal performance of phase change material

From Applied Thermal Engineering:

Numerical comparison between single PCM and multi-stage PCM based high temperature thermal energy storage for CSP tower plants

Research roundup: HDPE graphite composite; PCM-integrated PV modules; solar domestic hot water tank with PCM in the mantle; more

Ben Welter - Monday, May 07, 2018

From Particuology:

High density polyethylene (HDPE) — Graphite composite manufactured by extrusion: A novel way to fabricate phase change materials for thermal energy storage

From Solar Energy:

Life cycle costing as a bottom line for the life cycle sustainability assessment in the solar energy sector: A review

From Energy Conversion and Management:

Improving the thermal regulation and efficiency enhancement of PCM-integrated PV modules using nano particles
Climatic behaviour of solar photovoltaic integrated with phase change material

From Energy and Buildings:

Thermal performance assessment and improvement of a solar domestic hot water tank with PCM in the mantle
Fabrication and characterization of fatty acid/wood-flour composites as novel form-stable phase change materials for thermal energy storage

From Renewable Energy:

Possibility of using PCMs in temperature control and performance enhancements of free stand and building integrated PV modules
Performance evaluation of nano-enhanced phase change materials during discharge stage in waste heat recovery

From International Journal of Heat and Mass Transfer:

Microencapsulated n-eicosane PCM suspensions: Thermophysical properties measurement and modeling

From Journal of Energy Storage:

Numerical investigation of different PCM volume on cold thermal energy storage system

From Renewable and Sustainable Energy Reviews:

Methods of heat transfer intensification in PCM thermal storage systems: Review paper

From Applied Thermal Engineering:

A Review on Thermal Management Methods for Robots