The "gelled" material maintains its shape even as the PCM cycles between solid and liquid form. ..
MatVesl, CanVesl, TubeVesl and PackVesl are designed to transfer thermal energy efficiently in a wid..
The international group, formed in 2004, promotes the use of high-quality phase change material and ..
The Phase Change Matters e-mail newsletter is a weekly summary of the latest news and research on phase change materials and thermal energy storage. To subscribe, visit www.puretemp.com/subscribe. For more frequent updates, follow @puretemp on Twitter or visit the Phase Change Matters blog, www.puretemp.com/pcmatters.
The International Institute of Refrigeration has posted more than two dozen papers presented at the PCM 2016 conference in Karlsruhe, Germany, earlier this month. The downloads are available for 15 euros each. A few highlights:
• Passive cooling potential of two different PCM cooling ceilings in the energy efficiency center, (H. Weinlader, F. Klinker, M. Yasin)
"In the Energy Efficiency Center – the new R&D building of the ZAE Bayern - two different PCM cooling ceiling types are installed and monitored in two office rooms. The ceilings are connected to a water circuit and can be used for heating or cooling. The PCM ceilings are prototypes which differ in the positioning of the PCM layer: ceiling type 1 with the PCM on top of and ceiling type 2 with the PCM below the water pipes. It was found, that cooling ceiling type 2 had a better thermal connection between PCM and room, nevertheless, the passive cooling power of the two different system designs was quite similar when measured as a function of the room globe temperature."
• Experimental analysis on a novel air heat exchanger containing PCM in a cold room, (B. Copertaro, R. Fioretti, P. Principi)
"An air heat exchanger consisting of aluminium containers with finned surface filled with PCM (5 °C melting temperature) was located near the evaporator of a cold room. The aims are to reduce cooling energy consumption and improving the maintenance thermal conditions of stored products. For this purpose, an experimental campaign was carried out and a monitoring system was developed. The cold room thermal behaviour, with and without PCM, was studied under steady state operating conditions. As expected a reduced number of on/off compressor cycles (6 cycles instead 13 cycles) in the PCM added cold room was observed. Test results showed that by storing PCM in the air heat exchanger, up to 16% of energy saving can be achieved."
• Standardization of PCM characterization via DSC, (S. Gschwander, T. Haussmann, G. Hagelstein)
"This work investigates the influence of particle size on crystallization behaviour of microencapsulated and emulsified n-octadecane using differential scanning calorimetry (DSC) and laser diffraction. Analyses of microcapsules show a stepwise decrease of nucleation temperature (from 26 °C to 14 °C) with decreasing particle size (from 300 μm to 3 μm). Further reduction of particle size in emulsions (< 0.2 μm) results in a slight decrease of nucleation temperature (<2 °K)."
• A case study on the application of phase-change materials in buildings, (A. Hantsch)
"Energy storages employing the phase-change enthalpy of some material yield much larger energy densities than specific-heat-based systems. This case study is about the effect of phase-change materials on the heat and cooling load and annual energy demand for various scenarios. By means of a TRNSYS model it is possible to carry out energetic annual simulations. The results of this contribution allow giving advice for the design of new systems."
• Experimentation for the evaluation of aluminum foams for improving heat transfer in PCM thermal storages, (R. Lazzarin, S. Mancin, M. Noro)
"This work investigates the use of aluminum foams as heat transfer medium to improve the overall heat transfer of paraffin waxes that can be possible PCMs to be implemented in hybrid sensible-latent water TESs. The design of a new experimental testing rig is here presented together with some preliminary simulation results obtained during the phase change process of paraffin waxes with melting temperatures around 45 °C, with and without metal foams, in a water thermal storage unit."
• Comparison of a single stage and a multistage latent heat storage for domestic hot water delivery, (J. Diriken, J. van Bael, F. Leemans)
"In this paper we assess the potential to use multiple PCM in combination with a compact heat exchanger for direct domestic hot water delivery purposes for e.g. district heating substations. The results of the measurements on a compact thermal energy storage device based on multiple phase change materials with different melting temperatures are compared to a geometrical identical system with a single PCM with one melting temperature."
For a full list of papers, go to http://www.iifiir.org/ClientBookline/toolkit/p_requests/formulaire.asp?GRILLE=IIFRRECHFRIDOC&PORTAL_ID=portal_model_instance__fridoc_search.xml. Type Karlsruhe in the first search box, check "Conference papers," type 2016 in the box next to "Year" and then click "Search."
Sonoco ThermoSafe has posted a video preview of its new line of universal shipping solutions. The Certis Platform, coming in July, is designed to optimize warehouse space, reduce inventory costs, simplify training and increase productivity. Only three types of PureTemp phase change material and eight shippers are needed to create 24 shipping solutions across temperature ranges and duration.
U.S. patent application 20160146507 (applicants Richard Lee Johnson, Suffolk, Va.; Braden Eric Hines, Pasadena, Calif., et al):
"A system for receiving, transferring, and storing solar thermal energy. The system includes a concentrating solar energy collector, a transfer conduit, a thermal storage material, and an insulated container. The insulated container contains the thermal storage material, and the transfer conduit is configured to transfer solar energy collected by the solar energy collector to the thermal storage material through a wall of the insulated container."
U.S. patent application 20160146506 (applicant British American Tobacco, London):
A device is provided comprising a heat source material which is a phase change material and which undergoes an exothermic phase change upon activation by an activating agent to generate heat, a heat source chamber holding the heat source and an activation chamber providing the activating agent, and a barrier separating the interior of the heat source chamber from the interior of the activation chamber, wherein the activation chamber is deformable and wherein deformation of the activation chamber causes rupture of the barrier to allow contact between the activating agent and the heat source material. Embodiments also provide an activation chamber for use in the device and comprising an activating agent to trigger activation of a heat source material."
• Legislation signed into law last week by President Obama will provide tariff relief to U.S. chemical producers that import raw materials and intermediate products. “With 80 percent of specialty chemical manufacturers importing raw materials for which there is no domestic source, this bill is a huge deal,” said William E. Allmond IV, vice president of government and public relations at the Society of Chemical Manufacturers & Affiliates.
• The global thermal energy storage market will top $3 billion by 2023, according to a report published by Market Research Engine, “Global Thermal Energy Storage Market by Technology for Commercial and Industrial, Utilities, and Residential End Use Applications – Trends and Forecast 2016-2023.”
• Arsenal has unveiled new uniforms for the 2016-17 soccer season. The Puma jerseys feature ACTV Thermo-R technology. Strategically placed tape infused with microencapsulated phase change material absorbs excess heat and releases it back to the body when needed.
• Registration is open for the Green Chemistry and Engineering Conference June 14-16 in Portland, Ore. The theme for the 20th annual conference is "Advancing Sustainable Solutions by Design." Technical session topics include sustainable materials, chemical manufacturing processes, next-generation catalysis and chemical building blocks.
• Allen Yun, formerly director of strategic initiatives for OPTUM, is joining Pelican BioThermal as director of global services.
• A survey suggests that many U.S. companies will not meet OSHA's new hazard communication standards on time. The deadline for compliance is June 1.
• More than 8.1 million people worldwide are now employed by the renewable energy industry, up 5 percent from last year, the International Renewable Energy Agency says.
• The Environmental Protection Agency's chemical data reporting rule brings challenges and opportunities, writes James G. Votaw, a partner with the law firm Manatt, Phelps & Phillips. The next CDR reports, covering chemical manufacture and import activities during the period 2012-2015, must be submitted to the EPA by Sept. 30.
For our full list of recent academic research, see puretemp.com/academic. Here are highlights from the past week:From Energy and Buildings:
This week we welcomed the 750th member to our LinkedIn group. Kiran Siddappaji is a Ph.D. candidate in aerospace engineering at the University of Cincinnati.
You are invited to join the group and connect with PCM and TES experts from around the world. Other new members this week include Syntia Metchueng, energy efficiency engineer at EDF Group, Paris; Chong Wang, application engineering sales director, Schott Asia, Suzhou, China; Moe Kabbara, chief technology & communication officer at NeoTES, Halifax, Canada; and Eamonn O'Donovan, an energy engineering and sustainability consultant, Cork, Ireland.