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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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Patent application: Mattress containing microencapsulated phase change material

Ben Welter - Monday, October 29, 2018

U.S. patent application 20180279796 (applicant Milliken & Co., Spartanburg, S.C.):

"A mattress containing a core section, a high loft non-woven layer at least partially covering a first side of the core section and containing a plurality of heat and flame resistant fibers, bulking fibers, and binder fibers, a ticking layer at least partially covering the high loft non-woven layer and containing a textile layer, a pattern coated layer. The pattern coated layer may be printed on the high loft non-woven layer, the ticking layer, or any layer between the high loft non-woven layer and the ticking layer. The pattern coated layer contains a blend of microencapsulated phase change material (PCM) and a binder, wherein the PCM is fully encapsulated by the binder."

http://www.freepatentsonline.com/20180279796.pdf

Patent application: PCM module heat exchanger assembly

Ben Welter - Monday, October 29, 2018

U.S. patent application 20180283726 (applicant Air Innovations Inc., North Syracuse, N.Y.):

"A phase change material (PCM) module heat exchanger assembly includes a multi-section PCM container rotatingly supported about a center long axis of the multi-section PCM container, or a multi-section PCM container where one or more sections are slidingly mounted to the multi-section PCM container. Each section of a plurality of rotatably or slidingly selected PCM sections is selectably insertable into an air flow. A method of placing one of a group of two or more PCM sections into a building's heating, ventilation, or air conditioning (HVAC) ductwork and a method to harvest heating or cooling capacity for later use are also described."

http://www.freepatentsonline.com/20180283726.pdf

Patent application: Thermo protection storage cell for cold transport box

Ben Welter - Monday, October 29, 2018

U.S. patent application 20180283761 (applicant Swissmedpack Technologien JP. Buettiker GmbH, Basel, Switzerland):

"A thermo-protection-storage-cell for the ensuring of a temperature range from a lower temperature exposure limit to an upper temperature exposure limit contains a thermo-cell body and at least one filling chamber which is arranged in the thermo-cell body. At least one filling chamber is filled with a first phase-change material which changes its phase at the point of the lower temperature exposure limit. The at least one filling chamber is filled with a second phase-change material which changes its phase at the point of the upper temperature exposure limit. The thermo-protection-storage-cell facilitates an efficient and safe ensuring of a temperature-sensitive good in a useful way, especially during its transport."

http://www.freepatentsonline.com/20180283761.pdf

Patent application: Thermal energy storage systems

Ben Welter - Monday, October 29, 2018

PCES TES patent drawing

U.S. patent application 20180283800 (applicant Phase Change Energy Solutions Inc., Asheboro, N.C.):

"In one aspect, thermal energy storage systems are described herein. In some embodiments, a thermal energy storage system comprises a thermal energy storage system comprising a container and a heat exchange apparatus disposed within the container. The heat exchange apparatus comprises a tank, a manifold at least partially disposed within the tank, and a phase change material disposed within the tank and in thermal contact with the manifold."

http://www.freepatentsonline.com/20180283800.pdf

Patent application: Battery module and use of a propagation protection element

Ben Welter - Monday, October 29, 2018

U.S. patent application 20180309177 (applicant Robert Bosch GmbH, Stuttgart, Germany):

"A battery module comprising at least one battery cell, wherein the battery module further comprises a propagation protection element which is connected in a thermally conductive manner to the battery cell and which is designed in such a way that, when a specific value for a temperature of the at least one battery cell is exceeded, an endothermic process which is being executed within the propagation protection element absorbs heat which is given off by the at least one battery cell."

http://www.freepatentsonline.com/20180309177.pdf

Research roundup: Synthesis of n-butyl palmitate; graphite as heat-transfer enhancer in high-temperature inorganic PCM; more

Ben Welter - Thursday, October 25, 2018

From Journal of Thermal Analysis and Calorimetry:

Synthesis and characterization of the n-butyl palmitate as an organic phase change material

From Renewable Energy:

Encapsulation of high-temperature inorganic phase change materials using graphite as heat transfer enhancer

From Synthesis, Technology and Applications of Carbon Nanomaterials:

Activated Carbon for Shape-Stabilized Phase Change Material

From Applied Energy:

Thermal conductivity enhancement of phase change materials with 3D porous diamond foam for thermal energy storage

From Energy and Technology Journal:

Enhancement of Thermal Storage Properties of Phase Change Material by Using Metallic Swarf [pdf]

From ACS Sustainable Chemistry & Engineering:

Fabrication and Characterization of Flame-Retardant Nanoencapsulated n-Octadecane with Melamine–Formaldehyde Shell for Thermal Energy Storage

From Energy Storage Materials:

Polyurethane-Based Flexible and Conductive Phase Change Composites for Energy Conversion and Storage

From Materials Today:

Patent application: Enhanced thermally conductive cushioning foams

Ben Welter - Monday, October 22, 2018

U.S. patent application 20180298264 (applicant Peterson Chemical Technology LLC, Austin, Texas):

"Methods and combinations for making and using one or more thermally conductive cellular foam layers and other structures comprising flexible cellular foam and metallic material particulates, and said thermally-conductive cellular foam layers may be located on, under, or in cushioning foams and mattresses or placed between on, under, within, or between other layering substrates, columns, and other structures to increase the overall cooling capability of the composite. The thermally conductive foam may be used in mattresses, pillows, bedding products, seat cushions, medical cushioning foams, pet beds, and similar materials used in bedding and comfort products."

http://www.freepatentsonline.com/20180298264.pdf

Patent application: Flexible phase change material composite for thermal management systems

Ben Welter - Monday, October 22, 2018

U.S. patent application 20180298261 (applicant AllCell Technologies, Chicago, Ill.):

"A thermal management composite, comprising a phase change material within a carbon or graphite matrix. The matrix is coated with a polymer coating to improve flexibility. The matrix can be a molded carbon or graphite material or a carbon or graphite cloth."

http://www.freepatentsonline.com/20180298261.pdf

Research roundup: Solar fish dryer; oscillating heat pipe; small-scale refrigeration system; more

Ben Welter - Monday, October 22, 2018

From Applied Thermal Engineering:

Experiments on comparative performance of water thermocline storage tank with and without encapsulated paraffin wax packed bed
Experimental study and performance prediction of the PCM-antifreeze solar thermal system under cold weather conditions
Improving System Performance of a Personal Conditioning System integrated with Thermal Storage

From Energy:

A methodological concept for phase change material selection based on multi-criteria decision making (MCDM): A case study

From Journal of Energy Storage:

Experimental analysis of solar fish dryer using phase change material

From International Journal of Heat and Mass Transfer:

Experimental investigation on thermal performance of phase change material coupled with three-dimensional oscillating heat pipe (PCM/3D-OHP) for thermal management application

From Sustainable Cities and Society:

Experimental investigation on melting and solidification behaviour of erythritol in a vertical double spiral coil thermal energy storage system

From Journal of Thermal Analysis and Calorimetry:

Investigation of energy and exergy performance on a small-scale refrigeration system with PCMs inserted between coil and wall of the evaporator cabin

From Journal of Applied Physics:

Optimizing the design of composite phase change materials for high thermal power density

From Energy Procedia:

The technical and economic feasibility of utilizing phase change materials for thermal storage in district heating networks