The novel use of phase change materials in an open type refrigerated display cabinet: A theoretical investigation

AbstractA novel copolymer as a macromonomer with a polyethylene glycol (PEG) unit as the phase change element and a vinyl group was synthesized for the preparation of polymeric solid-solid phase change materials. The IR, 1HNMR, DSC and WAXD and POM were employed to determine the structure and properties of the novel monomer. The results show that the novel monomer possess steady molecular structure, excellent crystal properties, higher phase change enthalpy and reactivity. Furthermore, the novel polymeric solid-solid phase change material was also prepared via the copolymerization of the novel copolymer macromonomer and styrene. The phase change properties of the polymeric solid-solid phase change material were characterized.

Download Full-text

Properties of a Solid–Solid Phase Change Material PAN/SA-LA/ZMS

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.703.3 ◽

2014 ◽

Vol 703 ◽

pp. 3-8 ◽

Cited By ~ 2

Author(s):

Jing Guo ◽

Xiang Kang You ◽

Li Zhang ◽

Heng Xue Xiang ◽

Sen Zhang ◽

...

Keyword(s):

Phase Change ◽

Phase Change Materials ◽

Solid Phase ◽

The Novel ◽

Structure And Properties ◽

Scanning Calorimetry ◽

Solution Blending ◽

Blending Process ◽

Change Material ◽

Insulating Properties

In this study, novel solid–solid phase change materials (PCM) composed of polyacrylonitrile, binary of fatty acids ((blending of stearic acid (SA) and lauric acid (LA)) and zeolite molecular sieve (ZMS) were prepared by solution blending process. The structure and properties of the PCM were characterized using flourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), polarized optical microscopy (POM), differential scanning calorimetry (DSC) and thermogravimetric analysis (TG), respectively. DSC analysis indicated that the crystallization latent heat of the PCM was 125.22 J/g and its phase transition temperature was about 17 °C. The temperature curve for step cooling of the PCM showed that it’s holding time achieved 1 480 s, which explains that the PCM had excellent heat-insulating properties. Based on all results it can be concluded that the novel PCM can be considered as potential PCM for thermal energy storage.

Download Full-text

Theoretical investigation on inverse identification of spectral properties of paraffin phase change materials based on multi-thickness model

Solar Energy ◽

10.1016/j.solener.2021.07.006 ◽

2021 ◽

Vol 225 ◽

pp. 266-274

Author(s):

Linyang Wei ◽

Guojun Li ◽

Miaomiao Song ◽

Shuangcheng Sun

Keyword(s):

Phase Change ◽

Theoretical Investigation ◽

Spectral Properties ◽

Phase Change Materials ◽

Inverse Identification

Download Full-text

Research of Thermo-Regulating Fibers Based on the Crosslinked Composite Phase Change Materials of PEGA

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.821-822.107 ◽

2013 ◽

Vol 821-822 ◽

pp. 107-110

Author(s):

Hong Zhang ◽

Yan Ping Fang ◽

Ping Guo ◽

Qian Qian Wang ◽

Jing Guo ◽

...

Keyword(s):

Thermal Stability ◽

Phase Change ◽

Melt Spinning ◽

Phase Change Materials ◽

Breaking Strength ◽

The Novel ◽

Good Thermal Stability ◽

Composite Phase Change Materials ◽

Crosslinked Networks

The novel form-stable composite phase change materials (PCMs) of crosslinked PEGA and P(PEGA-HAM)/PEG gels were synthesized, which based on PEGA . Using crosslinked PEGA and P(PEGA-HAM)/PEG gels as the working substance , PP/PCM thermo-regulating fibers were prepared by blends via melt spinning respectively. TGA results indicate that the crosslinked form-stable PCMs have good thermal stability. The morphology of the surface of PP/PCM thermo-regulating fibers smooth mainly by SEM. The breaking strength of thermo-regulating fibers first increases and then decreases when increased some content of PCM. DSC results indicate the phase enthalpy of PEGA crosslinked gel and its the blend fibers with PP are 122.97J/g and 13.83J/g, while that of P(PEGA-HAM)/PEG crosslinked networks gel and its the blend fibers with PP are 107.48J/g and 4.62J/g respectively.

Download Full-text

Fabrication and Characterization of Novel Shape-Stabilized Phase Change Materials Based on P(TDA-co-HDA)/GO Composites

Polymers ◽

10.3390/polym11071113 ◽

2019 ◽

Vol 11 (7) ◽

pp. 1113

Author(s):

Sai Chen ◽

Yue Yu ◽

Ruirui Cao ◽

Haihui Liu ◽

Xingxiang Zhang

Keyword(s):

Energy Storage ◽

Phase Change ◽

Melting Temperature ◽

Phase Change Materials ◽

Molar Ratio ◽

Energy Storage Materials ◽

The Novel ◽

Acrylate Copolymer ◽

Solution Blending ◽

Blending Method

Shape-stabilized phase change materials (SPCMs) are green, reusable energy storage materials. Because the melting temperature of n-alkyl acrylate copolymer is adjustable by controlling the side-chain length, the appropriate melting temperature can be achieved. Poly(tetradecyl acrylate-co-hexadecyl acrylate) (P(TDA-co-HDA)) with a molar ratio of 1:1 and SPCMs were fabricated via an atom transfer radical polymerization (ATRP) method and a solution blending method with P(TDA-co-HDA) as a thermal storage material and graphene oxide (GO) as a supporting substance. In this composite, an SPCM was achieved, which absorbed heat at 29.9 °C and released it at 12.1 °C with a heat storage capacity of 70 J/g at a mass ratio of GO of 10%. The material retained its shape without any leakage at 60 °C, which was much higher than that of the melting temperature of P(TDA-co-HDA). The SPCMs exhibited good crystallization behaviors and excellent thermal reliabilities after 100 thermal cycles. The thermal properties of the P(TDA-co-HDA)/GO composite PCMs with various GO loadings were also investigated. The novel shape-stabilized PCMs fabricated in this study have potential uses in thermal energy storage applications.

Download Full-text