Porosity reduction of polyethylene glycol phase change materials by using nanoscale thermal-energy-conducting medium during crystallization process

2017 ◽  
Vol 134 (43) ◽  
pp. 45446 ◽  
Author(s):  
Haiquan Zhang ◽  
Qinrong Sun ◽  
Yanping Yuan ◽  
Xiaoling Cao
Keyword(s):  
Polyethylene Glycol ◽  
Phase Change ◽  
Thermal Energy ◽  
Phase Change Materials ◽  
Crystallization Process ◽  
Conducting Medium ◽  
Porosity Reduction

scholarly journals A Unique Strategy for Polyethylene Glycol/Hybrid Carbon Foam Phase Change Materials: Morphologies, Thermal Properties, and Energy Storage Behavior

Materials ◽  
2018 ◽  
Vol 11 (10) ◽  
pp. 2011 ◽  
Author(s):  
Xiaolong Su ◽  
Shikui Jia ◽  
Guowei Lv ◽  
Demei Yu
Keyword(s):  
Carbon Nanotubes ◽  
Polyethylene Glycol ◽  
Energy Storage ◽  
Phase Change ◽  
Thermal Energy ◽  
Phase Change Materials ◽  
Carbon Foam ◽  
Chemical Structures ◽  
Walled Carbon Nanotubes ◽  
Hybrid Carbon

Polyethylene glycol (PEG)/hybrid carbon foam (CF) phase change materials (PCMs) were prepared by integrating PEG into CF via dynamic-vacuum impregnation. The hybrid CF was first synthesized by mixtures of graphene oxide (GO) and carbon nanotubes (CNTs) with different volume ratios. The morphologies, chemical structures, thermal conductivities, shape-stabilization levels, and photo-thermal energy conversion levels of these composite PCMs were characterized systematically. The prepared composite PCMs exhibited good shape-stabilization levels and showed their original shapes without any PEG leakage. It was found that the polyethylene glycol/carbon foam with multi-walled carbon nanotubes (PEG/MCF) composite PCMs had a better shape-stable performance below the temperature of 250 °C, and the thermal conductivity of the PEG/MCF composite PCMs reached as high as 1.535 W/(mK), which was obviously higher than that of polyethylene glycol/carbon foam with single-walled carbon nanotubes (PEG/SCF, 1.159 W/(mK)). The results of the photo-thermal simulation tests showed that the composite PCMs had the ability to absorb light energy and then convert it to thermal energy, and the maximum thermal energy storage efficiency of the PEG/MCF composite PCMs and the PEG/SCF composite PCMs was 92.1% and 90.6%, respectively. It was considered that a valuable technique to produce high-performance composite PCMs was developed.

Polyethylene glycol-sugar composites as shape stabilized phase change materials for thermal energy storage

2012 ◽  
Vol 33 (10) ◽  
pp. 1728-1736 ◽  
Author(s):  
Cemil Alkan ◽  
Eva Günther ◽  
Stefan Hiebler ◽  
Ömer Faruk Ensari ◽  
Derya Kahraman
Keyword(s):  
Polyethylene Glycol ◽  
Energy Storage ◽  
Phase Change ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Phase Change Materials
Sign in / Sign up

Export Citation Format

Share Document