scholarly journals A New Approach for Transformer Cooling Systems: Application of Phase Change Materials (PCM)

2015 ◽  
Vol 127 (4) ◽  
pp. 1013-1015 ◽  
Author(s):  
E. Buyukbicakci ◽  
I. Temiz ◽  
H. Edral ◽  
Z. Buyukbicakci
Keyword(s):  
Phase Change ◽  
Phase Change Materials ◽  
Cooling Systems ◽  
New Approach

scholarly journals Controlling the near-field excitation of nano-antennas with phase-change materials

2013 ◽  
Vol 4 ◽  
pp. 632-637 ◽  
Author(s):  
Tsung Sheng Kao ◽  
Yi Guo Chen ◽  
Ming Hui Hong
Keyword(s):  
Thin Layer ◽  
Phase Change ◽  
Hot Spots ◽  
Phase Change Materials ◽  
Near Field ◽  
Plasmon Coupling ◽  
New Approach ◽  
Field Excitation ◽  
Bio Assay ◽  
Nano Antennas

By utilizing the strongly induced plasmon coupling between discrete nano-antennas and quantitatively controlling the crystalline proportions of an underlying Ge2Sb2Te5 (GST) phase-change thin layer, we show that nanoscale light localizations in the immediate proximity of plasmonic nano-antennas can be spatially positioned. Isolated energy hot-spots at a subwavelength scale can be created and adjusted across the landscape of the plasmonic system at a step resolution of λ/20. These findings introduce a new approach for nano-circuitry, bio-assay addressing and imaging applications.

scholarly journals Review of Development Survey of Phase Change Material Models in Building Applications

2014 ◽  
Vol 2014 ◽  
pp. 1-11 ◽  
Author(s):  
Hussein J. Akeiber ◽  
Mazlan A. Wahid ◽  
Hasanen M. Hussen ◽  
Abdulrahman Th. Mohammad
Keyword(s):  
Research And Development ◽  
Phase Change ◽  
Phase Change Material ◽  
Phase Change Materials ◽  
Green Buildings ◽  
Paper Briefly ◽  
Cooling Systems ◽  
Material Models ◽  
Development Models ◽  
Change Material

The application of phase change materials (PCMs) in green buildings has been increasing rapidly. PCM applications in green buildings include several development models. This paper briefly surveys the recent research and development activities of PCM technology in building applications. Firstly, a basic description of phase change and their principles is provided; the classification and applications of PCMs are also included. Secondly, PCM models in buildings are reviewed and discussed according to the wall, roof, floor, and cooling systems. Finally, conclusions are presented based on the collected data.

scholarly journals Degradation of Fatty Acid Phase-Change Materials (PCM): New Approach for Its Characterization

Molecules ◽  
2021 ◽  
Vol 26 (4) ◽  
pp. 982
Author(s):  
Marc Majó ◽  
Ricard Sánchez ◽  
Pol Barcelona ◽  
Jordi García ◽  
Ana Inés Fernández ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Phase Change ◽  
Phase Change Materials ◽  
Capric Acid ◽  
Chemical Degradation ◽  
Thermal Treatments ◽  
New Approach ◽  
Heating And Cooling ◽  
Different Types ◽  
Thermo Physical Properties

The use of adequate thermal energy storage (TES) systems is an efficient way to achieve thermal comfort in buildings reducing the cooling and heating demand. Besides, deploy phase change materials (PCM) to meet and enhance the TES needs is highly effective and widely studied. In this paper, a study of the degradation of two fatty acids is presented, capric and myristic acids, in order to evaluate whether their thermo-physical properties are affected throughout time during service. This was carried out by means of two different types of thermal treatments: degradation at constant temperature (thermal stability test), 60 °C during 100 h and 500 h, and degradation with heating and cooling cycling (thermal cycling stability), between a temperature range from 15 °C to 70 °C with 0.5 °C/min ramp during 500 and 1000 cycles. Despite no significant changes were measured for myristic acid, experimental results revealed a decrease of melting enthalpy of 6.6% in capric acid thermally treated for 500 h. Evidences of chemical degradation were found that might explain the decrease in thermophysical properties during use.

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