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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: NZEB analysis tool; multistage heat engine model; solar water heater with PCM; more

Ben Welter - Tuesday, August 25, 2015

Innovative technologies for NZEBs: an energy and economic analysis tool and a case study of a non-residential building in Mediterranean climate [Energy and Buildings]

Thermal efficiency analysis of the cascaded latent heat/cold storage with multi-stage heat engine model [Renewable Energy]

Experimental investigation of a domestic solar water heater with solar collector coupled phase-change energy storage [Renewable Energy]

Experimental testing and analysis of R134a clathrates based PCMs for cooling applications [International Journal of Heat and Mass Transfer]

Applications of solar water heating system with phase change material [Renewable and Sustainable Energy Reviews]

Effect of temperature on mortars with incorporation of phase change materials [Construction and Building Materials]

Microencapsulation and characterization of polyamic acid microcapsules containing n-octadecane via electrospraying method [Materials Express] [pdf]

Patent application: Fabric for an air bag

Ben Welter - Friday, July 31, 2015

U.S. patent application 20150203996 (Autoliv Development AB, Sweden): 

"A fabric for an air-bag comprising interwoven sets of warp and weft yarns, wherein the yarns of one of the least 1.5, and the yarns of the other set of yarns are not tape-like and have a width-depth ratio less than 1.5. ... 

"In further embodiments of the invention, a phase change material may be introduced to absorb heat. It will be understood that a phase change material has a high heat of fusion, and is capable of absorbing large amounts of energy when changing phase, for instance from the solid to the liquid phase."

http://www.freepatentsonline.com/20150203996.pdf

Research roundup: Solid PCM thermocline storage; solar paraffin wax melting unit; packed bed solar TES simulation; more

Ben Welter - Thursday, July 23, 2015

Multi-layered solid-PCM thermocline thermal storage for CSP; numerical evaluation of its application in a 50 MWe plant [Solar Energy]

Experimental Investigation of Solar Paraffin Wax Melting Unit Integrated with Phase Change Heat Energy Storage by Using Phase Change Material [Applied Mechanics and Materials]

Review on phase change material to maintain the human comfort inside the car [pdf] [IOSR Journal of Mechanical and Civil Engineering]

Mathematical Model of Packed Bed Solar Thermal Energy Storage Simulation [Energy Procedia]

PCM/graphite foam composite for thermal energy storage device [pdf] [Materials Science and Engineering]

Reliability verification of a solar–air source heat pump system with PCM energy storage in operating strategy transition [Renewable Engineering]

Preparation and characterization of phase change material microcapsules by a core-shell-like emulsion polymerization method [pdf] [Materials Science and Engineering]

Design and assessment of solar concentrator distillating system using phase change materials (PCM) suitable for desertic weathers [Desalination and Water Treatment]

Patent application: Tube-fin thermal storage evaporator

Ben Welter - Tuesday, July 21, 2015

U.S. patent application 20150198386 (applicant Halla Visteon Climate Control Corp.):

U.S. patent application 20150198386"A tube and fin arrangement of an evaporator for an air conditioning system for a vehicle having a first row of tubes disposed within a flow of air having at least two refrigerant tubes and at least two thermal storage tubes in thermal communication with ... at least two refrigerant tubes, each of the thermal storage tubes containing a phase change material. The tube and fin arrangement further includes a [fin] in thermal communication with the first row of tubes and configured to receive a flow of air therethrough."

http://www.freepatentsonline.com/20150198386.pdf

Research roundup: Storage evaporator for vehicle energy management; Heisler chart; PCM applications in building environment; more

Ben Welter - Friday, May 29, 2015

Modeling Air Conditioning System with Storage Evaporator for Vehicle Energy Management [Applied Thermal Engineering]

Expanding Heisler Chart to Characterize Heat Transfer Phenomena in a Building Envelope Integrated With Phase Change Materials [Applied Thermal Engineering]

Experimental evaluation at pilot plant scale of multiple PCMs (cascaded) vs. single PCM configuration for thermal energy storage [Renewable Energy]

Virtual Special Issue - PCM applications in building environment [Building and Environment]

Synthesis and Characteristics of Hygroscopic Phase Change Material: Composite Microencapsulated Phase Change Material (MPCM) and Diatomite [Energy and Buildings]

Design and calculation of a new storage tank for concentrating solar power plant [Energy Conversion and Management]

Microfluidic fabrication and thermal characteristics of core-shell phase change microfibers with high paraffin content [Applied Thermal Engineering]

Synthesis and characterization of thermal energy storage microencapsulated n-dodecanol with acrylic polymer shell [Energy]

Exergy analysis of discharging multi-tank thermal energy storage systems with constant heat extraction [Applied Energy]

Research roundup: Mini-emulsion polymerization; microcapsules in garments; diesel engine waste heat recovery

Ben Welter - Tuesday, May 12, 2015

Poly(methyl methacrylate) copolymer nanocapsules containing phase-change material (n-dodecanol) prepared via miniemulsion polymerization [Journal of Applied Polymer Science]

Influences of the PCM Microcapsules on Thermal Properties of the Garment [pdf] [International Conference on Information Sciences, Machinery, Materials and Energy]

Experimental Investigation of a Cascaded Latent Heat Storage System for Diesel Engine Waste Heat Recovery [Energy Sources]

Patent application: Utilizing waste heat in hybrid vehicle via PCM

Ben Welter - Thursday, April 09, 2015

Patent application 20150089922 drawingPatent application 20150089922 (Assignee: Ford Global Technologies): "The system may reduce engine warm-up time and increase an amount of time an engine of a hybrid vehicle is deactivated while the hybrid vehicle is powered by a motor. In one example, a phase change material selectively stores and releases exhaust gas energy from and engine to improve vehicle operation."

http://www.freepatentsonline.com/20150089922.pdf

What PCMs are available for use in catalytic converters?

Ben Welter - Friday, November 21, 2014

Subramanian Sendilvelan of Bharath University in Chennai, India, asks, via ResearchGate: What phase change materials are available at 300˚C for use in catalytic converters? A professor at Chaitanya Bharathi Institute of Technology in Hyderabad suggests a 2012 paper on the use of PCMs in vehicles might be useful in exploring that topic.