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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: Sodium stearoyl lactylate as stabilizer; oscillating heat-pipe battery; paraffin nanocomposite; more

Ben Welter - Monday, December 14, 2015

Thermal behavior of paraffin-nano-Al2O3 stabilized by sodium stearoyl lactylate as a stable phase change material with high thermal conductivity [Renewable Energy]

Thermal performance of phase change material/oscillating heat pipe-based battery thermal management system [International Journal of Thermal Sciences]

Preparation and thermal performance of paraffin/nano-SiO2 nanocomposite for passive thermal protection of electronic devices [Applied Thermal Engineering]

A comparative study on PCM and ice thermal energy storage tank for air-conditioning systems in office buildings [Applied Thermal Engineering]

Economic impact of integrating PCM as passive system in buildings using Fanger comfort model [Energy and Buildings]

Research roundup: FE analysis of woven fabric; algebraic thermocline model; heat storage paint; more

Ben Welter - Monday, December 07, 2015

FE Analysis of Thermal Properties of Woven Fabric Constructed by Yarn Incorporated with Microencapsulated Phase Change Materials [pdf] [Fibers and Polymers]

Algebraic model for thermocline thermal storage tank with filler material [Solar Energy]

Thermal characterization of phase change materials based on linear low-density polyethylene, paraffin wax and expanded graphite [Renewable Energy]

Development and performance evaluation of heat storage paint with MPCM for applying roof materials as basic research [Energy and Buildings]

Water Phase Change Heat Exchanger System Level Analysis for Low Lunar Orbit [International Conference on Environmental Systems]

Analysis and optimization of melting temperature span for a multiple-PCM latent heat thermal energy storage unit [Applied Thermal Engineering]

Research roundup: Shape-stabilized PCM based on HDPE, paraffin; intumescent flame retardant; paraffin, expanded perlite and cement mortar; more

Ben Welter - Thursday, November 12, 2015

Shape stabilised phase change materials based on a high melt viscosity HDPE and paraffin waxes [Applied Energy]

Energy performance of building envelopes integrated with phase change materials for cooling load reduction in tropical Singapore [Applied Energy]

Influence of intumescent flame retardant on thermal and flame retardancy of eutectic mixed paraffin/polypropylene form-stable phase change materials [Applied Energy]

Exergoeconomic and environmental analyses of an air conditioning system using thermal energy storage [Applied Energy]

Influence of design on performance of a latent heat storage system for a direct steam generation power plant [Applied Energy]

Sensible heat thermal storage energy and exergy performance evaluations [Renewable and Sustainable Energy Reviews]

Utilization of paraffin/expanded perlite materials to improve mechanical and thermal properties of cement mortar [Construction and Building Materials]

A reference device for evaluating the thermal behavior of installed multilayered wall containing a phase change material [Energy Conversion and Management]

Recent developments in integrated collector storage (ICS) solar water heaters: A review [Renewable and Sustainable Energy Reviews]

Development of thermal storage material using vermiculite and calcium hydroxide [Applied Thermal Engineering]

Development of a novel phase change material emulsion for cooling systems [Renewable Energy]

Research roundup: Thermal characteristics of microencapsulated PCM; expanded graphite and paraffin; problems associated with PCMs; more

Ben Welter - Thursday, November 05, 2015

Micro-Encapsulated Phase-Change Materials for Latent-Heat Storage: Thermal Characteristics [pdf] [Materials and Technology]

Improvement of thermal conductivity of paraffin by adding expanded graphite [Journal of Composite Materials]

Figure of Merit for the Thermal Performance of Cementitious Composites Containing Phase Change Materials [Cement and Concrete Composites]

SigmaPipe as an Education Tool for Engineers [Education for Chemical Engineers]

Experimental study on crystallization process and prediction for the latent heat of ice slurry generation based sodium chloride solution [Applied Energy]

Review on Latent Heat Storage and Problems Associated With Phase Change Materials [pdf] [International Journal of Research in Engineering and Technology]

Smart Building: Decision Making Architecture for Thermal Energy Management [Sensors]

Research roundup: Supercooling of salt hydrates; lauric acid/expanded perlite; ice thermal energy storage; more

Ben Welter - Monday, October 26, 2015

Experimental characterisation of sub-cooling in hydrated salt phase change materials [Applied Thermal Engineering]

Research on the preparation and properties of lauric acid/expanded perlite phase change materials [Energy and Buildings]

The potential of lightweight low-energy houses with hybrid adaptable thermal storage: comparing the performance of promising concepts [Energy and Buildings]

Ice thermal energy storage (ITES) for air-conditioning application in full and partial load operating modes [International Journal of Refrigeration]

Reproducibility of solidification and melting processes in a latent heat thermal storage tank [International Journal of Refrigeration]

Patent application: Heat storage material composition and heat storage material

Ben Welter - Friday, October 23, 2015

U.S. patent application 20150299548 (applicant Kitagawa Industries, Aichi, Japan):

"A heat storage material composition contains a styrene-ethylene-ethylene-propylene-styrene copolymer and a paraffin-based wax. The heat storage material composition preferably further contains a paraffin-based process oil that softens the styrene-ethylene-ethylene-propylene-styrene copolymer. Also, the heat storage material composition preferably contains not less than 300 parts by mass and not more than 1000 parts by mass of the wax with respect to 100 parts by mass of the styrene-ethylene-ethylene-propylene-styrene copolymer."

http://www.freepatentsonline.com/20150299548.pdf

Patent application: Low-cost process for manufacture of form-stable PCM

Ben Welter - Friday, October 23, 2015

U.S. patent application 20150299416 (applicant REG Synthetic Fuels, Ames, Iowa):

"The present technology generally relates to phase change material (PCM) pellets consisting essentially of a mixture of paraffin, a polymer, and optionally a thermal conductivity improver, a nucleating agent, an anti-oxidant, or a combination of any two or more thereof; wherein the paraffin is at least about 60 wt % of the PCM pellet; and the polymer is uncrosslinked high density polyethylene (HDPE) that has a melt flow index between about 0.1 g/10 min and about 50 g/10 min."

http://www.freepatentsonline.com/20150299416.pdf

Research roundup: Closed-loop oscillating heat pipe; PCM wall design; heat exchanger with normal annular fins; more

Ben Welter - Tuesday, October 13, 2015

Experimental investigation on thermal performance of phase change material coupled with closed-loop oscillating heat pipe (PCM/CLOHP) used in thermal management [Applied Thermal Engineering]

Thermal Performance of a New Type of Phase Change Material Room in Summer and Winter [Procedia Engineering]

Design of Phase Change Material Wall Based on the Heat Transfer Characteristics in Summer [Procedia Engineering]

Simulation for a New Type of Photovoltaic (PV) Fresh Air and Domestic Hot Water System [Procedia Engineering]

A novel solid–gas thermochemical multilevel sorption thermal battery for cascaded solar thermal energy storage [Applied Energy]

Parameter effect of a phase change thermal energy storage unit with one shell and one finned tube on its energy efficiency ratio and heat storage rate [Applied Thermal Engineering]

Fabrication, thermal properties and thermal stabilities of microencapsulated n-alkane with poly(lauryl methacrylate) as shell [Thermochimica Acta]

Thermal analysis of PCM containing heat exchanger enhanced with normal annular fins [Mechanical Sciences] [pdf]

Research roundup: PCM/CSP review; paraffin/vermiculite PCM for cement-based composites; shell-tube thermal energy storage

Ben Welter - Wednesday, September 30, 2015

Application of phase change materials for thermal energy storage in concentrated solar thermal power plants: A review to recent developments [Applied Energy]

Paraffin/expanded vermiculite composite phase change material as aggregate for developing lightweight thermal energy storage cement-based composites [Applied Energy]

Analysis of HTFs, PCMs and fins effects on the thermal performance of shell–tube thermal energy storage units [Solar Energy]

Research roundup: Heat pipe network performance; lauric-palmitic-stearic acid/vermiculite; natural convection in cylindrical annulus; more

Ben Welter - Tuesday, September 29, 2015

Numerical investigation of the effect of adiabatic section location on thermal performance of a heat pipe network with the application in thermal energy storage systems [American Physical Society]

Study on thermal property of lauric–palmitic–stearic acid/vermiculite composite as form-stable phase change material for energy storage [Advances in Mechanical Engineering]

Numerical investigation of the effects of natural convection on the melting process of phase change material in cylindrical annulus [International Journal for Research in Applied Science & Engineering Technology]

Numerical study on thermal performance characteristics of a cascaded latent heat storage unit [Journal of Power and Energy]

Adjoint-based shape optimization of fin geometry for enhanced solid/liquid phase-change process [American Physical Society]

Optical properties of a liquid paraffin-filled double glazing unit [Energy and Buildings]

Active thermal mass enhancement using phase change materials [Energy and Buildings]