High-pressure Raman spectroscopy of phase change materials

2013 ◽  
Vol 103 (19) ◽  
pp. 191908 ◽  
Author(s):  
Wen-Pin Hsieh ◽  
Peter Zalden ◽  
Matthias Wuttig ◽  
Aaron M. Lindenberg ◽  
Wendy L. Mao
Keyword(s):  
Raman Spectroscopy ◽  
High Pressure ◽  
Phase Change ◽  
Phase Change Materials

Supercritical Impregnation of Organic Phase Change Materials into Polyester Fiber

2007 ◽  
Vol 544-545 ◽  
pp. 853-856
Author(s):  
Chang Sik Ju ◽  
Tae Won Kim ◽  
Si Young Kim
Keyword(s):  
High Pressure ◽  
Phase Change ◽  
Organic Phase ◽  
Phase Change Materials ◽  
High Energy ◽  
Polyester Fiber ◽  
High Pressure Pump ◽  
Supercritical Impregnation ◽  
A New Technique ◽  
Paraffin Waxes

A new technique preparing polyester fiber impregnated with organic phase change material(PCM) was proposed and experimentally examined. The impregnation apparatus consisted of a high pressure pump, two consecutive high pressure cylinders and auxiliary facilities. Polyester fiber was bound on cylindrical stainless steel net inside equilibrium cylinder and was impregnated with supercritical solution of PCM. PCMs, paraffin waxes and organic acids, were successfully impregnated into the polyester fiber even at temperature below it’s glass transition temperature(Tg), and the impregnated fibers showed high energy storage and release capacity around the melting point of respective PCMs.

scholarly journals Development and Experiments of an Electrothermal Driven Deep-Sea Buoyancy Control Module

Micromachines ◽  
2020 ◽  
Vol 11 (11) ◽  
pp. 1017
Author(s):  
Jiaoyi Hou ◽  
Weifeng Zou ◽  
Zihao Li ◽  
Yongjun Gong ◽  
Vitalii Burnashev ◽  
...  
Keyword(s):  
High Pressure ◽  
Phase Change ◽  
Control Systems ◽  
Deep Sea ◽  
Phase Change Materials ◽  
High Pressures ◽  
Electric Heating ◽  
Control Module ◽  
Flexible Material ◽  
Buoyancy Control

Due to the extremely high pressures in the deep sea, heavy ballast tanks and pressure compensating hydraulic tanks are typically required to support the operation of classic buoyancy controls. Buoyancy control systems driven by phase-change materials (PCM) have unique advantages over conventional hydraulically actuated buoyancy control systems, including high adaptability for deep-sea exploration and simple, lightweight, and compact structures. Inspired by this, a buoyancy control module (BCM) was designed with flexible material as the shell. Instead of a conventional mechanical system, the device uses an electric heating drive to control buoyancy by heating and cooling the PCM. Based on the principle of pressure compensation, this device can adjust the buoyancy of a small underwater vehicle in a deep-sea high-pressure environment. The BCM successfully adjusts the buoyancy to lift itself up and down in the South China Sea at a depth of 3223 m. The performance of the phase-change BCM to control buoyancy under high pressure is validated by systematic experiments and theoretical analysis. Our work proposes a flexible scheme for the design of a deep-sea phase-change-driven BCM and highlights its potential application in deep-sea micro-mechanical systems, especially soft robots.

Crystallization fractionation technology for paraffin-based phase change materials production

2020 ◽  
pp. 33-38
Author(s):  
S.S. Kruglov (Jr.) ◽  
◽  
G.L. Patashnikov ◽  
S.S. Kruglov (Sr.) ◽  
◽  
...  
Keyword(s):  
Phase Change ◽  
Phase Change Materials

Various Applications of Phase Change Materials: Thermal Energy Storing Materials

2017 ◽  
Vol 6 (4) ◽  
pp. 167-171 ◽  
Author(s):  
M. A. Boda ◽  
◽  
R. V. Phand ◽  
A. C. Kotali ◽  
◽  
...  
Keyword(s):  
Phase Change ◽  
Thermal Energy ◽  
Phase Change Materials
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