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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: PCM in free-moving ceiling; phase interface effects; window shutter; solar chimney; more

Ben Welter - Tuesday, April 07, 2015

Melting processes of phase change materials in an enclosure with a free-moving ceiling: An experimental and numerical study [International Journal of Heat and Mass Transfer]

Phase interface effects in the total enthalpy-based lattice Boltzmann model for solid–liquid phase change [Journal of Computational Physics]

Electroless plating of copper layer on surfaces of urea–formaldehyde microcapsule particles containing paraffin for low infrared emissivity [Particuology]

Constructal design of phase change material enclosures used for cooling electronic devices [Applied Thermal Engineering]

Numerical study of PCM solidification in a finned tube thermal storage including natural convection [Applied Thermal Engineering]

Effect of water based AL2O3 Nanoparticle PCM on cool storage performance [Applied Thermal Engineering]

Optimization of Heat Exchange in a Heat Accumulator with Latent Heat Storage [Procedia Technology]

Performance of a window shutter with phase change material under summer Mediterranean climate conditions [Applied Thermal Engineering]

Review on shell materials used in the encapsulation of phase change materials for high temperature thermal energy storage [Renewable and Sustainable Energy Reviews]

An experimental study on the thermal performance of a solar chimney without and with PCM [Renewable Energy]

Research roundup: Stability testing of high-temperature PCMs; n-octadecane in spherical capsule; modeling peak load reduction; more

Ben Welter - Friday, April 03, 2015

Determination of thermo-physical properties and stability testing of high-temperature phase change materials for CSP applications [Solar Energy Materials and Solar Cells]

The experimental exploration of sodium chloride solution on thermal behavior of phase change materials [Solar Energy Materials and Solar Cells]

Fixed-grid numerical modeling of melting and solidification using variable thermo-physical properties – Application to the melting of n-Octadecane inside a spherical capsule [International Journal of Heat and Mass Transfer]

Experimental observations on the heat transfer enhancement caused by natural convection during melting of solid–liquid phase change materials (PCMs) [Applied Energy]

Modeling Peak Load Reduction and Energy Consumption Enabled by an Integrated Thermal Energy and Water Storage System for Residential Air Conditioning Systems in Austin, Texas [Energy and Buildings]

Up to $55 billion available in energy savings performance contracts

Ben Welter - Friday, April 03, 2015

The Department of Energy is seeking proposals for the implementation of energy savings performance contracts at any U.S. government site worldwide. Up to $55 billion is available, spread across 12 "indefinite delivery, indefinite quantity" contracts. Thermal energy storage is among the project categories. Reed Smith offers an excellent overview of the opportunity:

"Although bidding is limited to energy service companies ... this is still a great opportunity for teaming and/or subcontracting and financing some of the most innovative projects of this decade. With smaller government spending and more focus on holding contractors accountable, DOE’s ESPC program may be a blueprint for government contractors moving forward."

http://www.reedsmith.com/DOEs-New-55-Billion-ESPC-Solicitation-03-31-2015/

Dutch-led project explores use of high-temperature PCMs to improve industrial efficiency

Ben Welter - Thursday, April 02, 2015

A consortium led by the Energy Research Centre of the Netherlands (ECN) is working to develop industrial heat storage applications using phase change materials. The two-year LOCOSTO project is focusing on the application of new PCMs with a substantial heat storage density at temperatures between 100°C and 250°C.

Participants include end users Dow Chemical and Emmtec Services, engineering consultant DWA, system supplier Bronswerk Heat Transfer and materials suppliers Nedmag, Salca and Croda.

https://www.ecn.nl/news/item/locosto-improving-industrial-energy-efficiency-by-storage-of-heat/

Patent application: Thermal management system with PCM liner and panels

Ben Welter - Thursday, April 02, 2015

U.S. patent application 20150068242 [Pelican BioPharma, applicant]:

Patent application U.S. patent application 20150068242 drawing"A thermal management system includes a case; an insulation material provided within the case, the insulation material defining an interior volume of the insulation material; a liner arranged in the interior volume, the liner having an inner surface that extends toward a center of the case; an outer container of phase change material provided in the liner, the outer container comprising a plurality of outer panels containing a first phase change material, the plurality of outer panels comprising a bottom outer panel, a top outer panel, and side outer panels; and an inner container of phase change material provided in the outer container, the inner container comprising a plurality of inner panels containing a second phase change material; wherein an outer surface of each of the side outer panels is parallel with the inner surface of the liner."

Pluss Polymers seeks funding to help introduce new products

Ben Welter - Thursday, April 02, 2015

Pluss Polymers, a New Delhi-based maker of phase change materials and specialized polymers, is seeking to raise additional funding to help introduce new products, including a low-cost solar drier designed for small farms. 

“We are looking at raising another round of funding that should be complete in six to eight months. It would help us bring out newer products. The company is also looking at entering the retail, pharma transport and building market this year,” Samit Jain, business development director, told India's Financial Chronicle.

http://www.mydigitalfc.com/news/pluss-polymers-scouts-second-round-funding-549

Gainesville library adding ice-based energy storage system

Ben Welter - Thursday, April 02, 2015

The county library in downtown Gainesville, Fla., is replacing its existing 195-ton chiller with a high-efficiency 130-ton chiller and five thermal energy storage tanks. The tanks will be used to collect and freeze water during off-peak hours, when electricity is cheaper. The ice will then be used to chill the building's air-conditioning system during the day. The CALMAC system is projected to save the county about $40,000 a year in energy costs.

http://www.gainesville.com/article/20150401/GUARDIAN/150409948

Research roundup: Solid-liquid phase change region; latent heat and cold storage; energy requirements vs. comfort levels

Ben Welter - Wednesday, April 01, 2015

Thermal properties of n-pentadecane, n-heptadecane and n-nonadecane in the solid/liquid phase change region [International Journal of Thermal Sciences]

Parametrical analysis of latent heat and cold storage for heating and cooling of rooms  [Applied Thermal Engineering]

Phase change materials for photovoltaic thermal management [Renewable and Sustainable Energy Reviews]

Analysis of energy requirements versus comfort levels for the integration of phase change materials in buildings [Journal of Building Engineering]

Research roundup: PCM in building walls; chitosan-gelatin microcapsules; STES analysis; silicon carbide powder

Ben Welter - Tuesday, March 31, 2015

Thermal Energy Storage for Building: Thermodynamic and Heat Transfer
Analysis for Integration of PCMs in Building Walls
[ American Society for Engineering Education]

The Preparation and Characterization of Chitosan–Gelatin Microcapsules and Microcomposites with Fatty Acids as Thermal Energy Storage Materials [Energy Technology]

Net energy analysis of a solar combi system with Seasonal Thermal Energy Store [Applied Energy]

Preparation of Microcapsules Containing Phase Change Material and Silicon Carbide Powder with Interfacial Polycondensation Reaction Method [Materials Sciences and Applications]

Thermal storage expert Lucas Hyman joins Entropy Solutions board of advisors

Ben Welter - Monday, March 30, 2015

Lucas Hyman, P.E.Lucas B. Hyman, an internationally renowned authority on thermal energy storage, has joined Entropy Solutions Inc.’s board of advisors.

Mr. Hyman, founder and president of Goss Engineering Inc. of Corona, Calif., is a LEED-accredited mechanical engineer with more than 30 years of experience. His clients have included major universities, government agencies, schools, hospitals, industrial facilities, the military and private firms. He is the author of two books, “Sustainable On-site CHP Systems” (McGraw-Hill, 2009) and “Sustainable Thermal Storage Systems” (McGraw-Hill, 2011) and has published a number of papers and articles.

http://www.puretemp.com/stories/tes-expert