A New Solar Receiver Thermal Store for Space-Based Activities Using Multiple Composite Phase-Change Materials

1995 ◽  
Vol 117 (3) ◽  
pp. 215-220 ◽  
Author(s):  
Zhen-Xiang Gong ◽  
A. S. Mujumdar
Keyword(s):  
Phase Change ◽  
Single Phase ◽  
Phase Change Materials ◽  
Element Model ◽  
Outlet Temperature ◽  
Composite Phase Change Materials ◽  
Composite Configuration ◽  
Solar Receiver ◽  
Change Material ◽  
Selection Of

A new solar receiver latent thermal energy storage module for space-based activities is proposed. It is different from a conventional module (which uses a single phase-change material (PCM)); this module uses a composite configuration of multiple PCMs. A finite element model is presented which simulates the transient cyclic thermal process involved. Computations have been carried out to investigate the potential advantages of a composite multi-PCM store over a single PCM store. Numerical results indicate that variation of the fluid outlet temperature can be significantly reduced by appropriate selection of multiple composite PCMs.

Thermal buffering performance of composite phase change materials applied in low-temperature protective garments

2017 ◽  
Vol 31 (16-19) ◽  
pp. 1744102 ◽  
Author(s):  
Kai Yang ◽  
Mingli Jiao ◽  
Yuanyuan Yu ◽  
Xueying Zhu ◽  
Rangtong Liu ◽  
...  
Keyword(s):  
Low Temperature ◽  
Phase Change ◽  
Phase Change Materials ◽  
Buffering Capacity ◽  
Climate Chamber ◽  
Functional Textiles ◽  
Composite Phase Change Materials ◽  
Change Temperature ◽  
Thermal Buffering ◽  
Change Material

Phase change material (PCM) is increasingly being applied in the manufacturing of functional thermo-regulated textiles and garments. This paper investigated the thermal buffering performance of different composite PCMs which are suitable for the application in functional low-temperature protective garments. First, according to the criteria selecting PCM for functional textiles/garments, three kinds of pure PCM were selected as samples, which were [Formula: see text]-hexadecane, [Formula: see text]-octadecane and [Formula: see text]-eicosane. To get the adjustable phase change temperature range and higher phase change enthalpy, three kinds of composite PCM were prepared using the above pure PCM. To evaluate the thermal buffering performance of different composite PCM samples, the simulated low-temperature experiments were performed in the climate chamber, and the skin temperature variation curves in three different low temperature conditions were obtained. Finally composite PCM samples’ thermal buffering time, thermal buffering capacity and thermal buffering efficiency were calculated. Results show that the comprehensive thermal buffering performance of [Formula: see text]-octadecane and [Formula: see text]-eicosane composite PCM is the best.

scholarly journals Fabrication and characterization of novel shape-stabilized stearic acid composite phase change materials with tannic-acid-templated mesoporous silica nanoparticles for thermal energy storage

RSC Advances ◽  
2017 ◽  
Vol 7 (26) ◽  
pp. 15625-15631 ◽  
Author(s):  
Yan Chen ◽  
Xiongjie Zhang ◽  
Beifu Wang ◽  
Mengjiao Lv ◽  
Yingying Zhu ◽  
...  
Keyword(s):  
Mesoporous Silica ◽  
Stearic Acid ◽  
Phase Change ◽  
Silica Nanoparticles ◽  
Tannic Acid ◽  
Phase Change Materials ◽  
Mesoporous Silica Nanoparticles ◽  
Composite Phase Change Materials ◽  
Change Material

A novel shape-stabilized phase change material, prepared by immobilizing stearic acid onto tannic-acid-templated mesoporous silica nanoparticles.

Preparation and thermal properties of shape-stabilized composite phase change materials based on polyethylene glycol and porous carbon prepared from potato

RSC Advances ◽  
2016 ◽  
Vol 6 (19) ◽  
pp. 15821-15830 ◽  
Author(s):  
Bo Tan ◽  
Zhaohui Huang ◽  
Zhaoyu Yin ◽  
Xin Min ◽  
Yan'gai Liu ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Polyethylene Glycol ◽  
Phase Change ◽  
Phase Change Material ◽  
Porous Carbon ◽  
Phase Change Materials ◽  
Composite Phase Change Materials ◽  
Composite Phase Change Material ◽  
Change Material

A shape-stabilized composite phase change material comprising PEG and porous carbon was prepared by absorbing PEG into porous carbon.

Interface Characterization of Metals and Metal-nitrides to Phase Change Materials

2011 ◽  
Vol 1337 ◽  
Author(s):  
Deepu Roy ◽  
Dirk J. Gravesteijn ◽  
Rob A. M. Wolters
Keyword(s):  
Contact Resistance ◽  
Phase Change ◽  
Phase Change Materials ◽  
Electrode Materials ◽  
Interfacial Contact ◽  
Interfacial Contact Resistance ◽  
Change Material ◽  
Change Memory ◽  
Selection Of

ABSTRACTWe have investigated the interfacial contact properties of the CMOS compatible electrode materials W, TiW, Ta, TaN and TiN to doped-Sb2Te phase change material (PCM). This interface is characterized both in the amorphous and in the crystalline state of the doped-Sb2Te. The electrical nature of the interface is characterized by contact resistance measurements and is expressed in terms of specific interfacial contact resistance (ρC). These measurements are performed on four-terminal Kelvin Resistor test structures. Knowledge of the ρC is useful for selection of the electrode in the integration and optimization of the phase change memory cells.

A Study on the Development of Phase Change Material Wall

2011 ◽  
Vol 347-353 ◽  
pp. 2773-2776
Author(s):  
Quan Ying Yan ◽  
Li Li Jin ◽  
Lin Zhang
Keyword(s):  
Phase Change ◽  
Phase Change Material ◽  
Phase Change Materials ◽  
Materials Used ◽  
Change Material ◽  
Selection Of

In this paper, the types, properties and selection of phase-change materials used in the wall were evaluated. The feasibility and methods to add phase change materials into the wall were discussed. The application and development situation of the phase change material wall in the practice were elaborated. Some problems to be solved are pointed out.

Pore-scale analysis on selection of composite phase change materials for photovoltaic thermal management

2021 ◽  
Vol 302 ◽  
pp. 117558
Author(s):  
Xinyi Li ◽  
Wei Cui ◽  
Terrence Simon ◽  
Ting Ma ◽  
Tianhong Cui ◽  
...  
Keyword(s):  
Phase Change ◽  
Thermal Management ◽  
Phase Change Materials ◽  
Scale Analysis ◽  
Pore Scale ◽  
Composite Phase Change Materials ◽  
Selection Of

Preparation and Characterization of Diatomite Loaded Composite Phase Change Materials

2013 ◽  
Vol 320 ◽  
pp. 314-319
Author(s):  
Jun Mao ◽  
Shui Lin Zheng ◽  
Yu Zhong Zhang ◽  
Yan Ping Bai ◽  
Yue Liu
Keyword(s):  
Phase Change ◽  
Phase Change Material ◽  
Phase Change Materials ◽  
Physical Adsorption ◽  
Phase Change Temperature ◽  
Composite Phase Change Materials ◽  
Change Temperature ◽  
Composite Phase Change Material ◽  
And Performance ◽  
Change Material

Organic phase change materials like paraffin as phase change material, modified diatomite as carrier, composite phase change material with proper phase change temperature and larger phase change enthalpy is prepared by melt blending. The structure and performance of composite phase material are characterized using SEM, FI-IR and synthesized thermal analyzer DSC. The results show that the phase change temperature of composite phase change material is 30, and phase change enthalpy is 89.54J/g. With every part preserved, phase change particles are distributed in the diatomite/melted paraffin matrix evenly. Stable composite phase change materials are prepared with diatomite as carrier and paraffin as PCM, which are bonded with Vander Waals forces in the form of physical adsorption.

scholarly journals Preparation of Stearic acid/Diatomite Composite Phase Change Material

2021 ◽  
Vol 245 ◽  
pp. 03070
Author(s):  
Jianping Zong ◽  
Defu Wang ◽  
Yanlin Jin ◽  
Xing Gao ◽  
Xinxin Wang
Keyword(s):  
Stearic Acid ◽  
Phase Change ◽  
Phase Change Material ◽  
Phase Change Materials ◽  
Intermolecular Forces ◽  
Impregnation Method ◽  
Vacuum Degree ◽  
Composite Phase Change Materials ◽  
Composite Phase Change Material ◽  
Change Material

The composite phase change material was prepared via the impregnation method using diatomaceous as the carrier and stearic acid as the phase change material. The effects of diatomite content, temperature, immersion time and pressure on the mass ratio of stearic acid and diatomaceous earth in the composite phase change materials were discussed. The experimental results showed that the optimum conditions for preparing stearic acid/diatomite composite phase change material were immersion temperature of 80℃, socking time of 2 h, diatomite mass fraction of 23.04%, and vacuum degree of 0.03 MPa. Finally, the infrared spectroscopy analysis of stearic acid/diatomite composite phase change energy storage material showed that there is no chemical reaction between stearic acid and diatomite. And they are held together by intermolecular forces.

scholarly journals Simple in situ synthesis of SiC nanofibers on graphite felt as a scaffold for improving performance of paraffin-based composite phase change materials

RSC Advances ◽  
2022 ◽  
Vol 12 (2) ◽  
pp. 878-887
Author(s):  
Xiao Li ◽  
Hao Wang ◽  
Xuening Yang ◽  
Xiaoguang Zhang ◽  
Bin Ma
Keyword(s):  
Thermal Properties ◽  
Phase Change ◽  
Phase Change Materials ◽  
Thermal Conversion ◽  
In Situ Synthesis ◽  
Flexible Design ◽  
Composite Phase Change Materials ◽  
Composite Phase Change Material ◽  
Change Material

The composite phase change material has excellent thermal properties, good photo-thermal conversion efficiency and flexible design in size, which produces a type of material for applications in solar and buildings energy storage.

Effects of carbon nanotubes additive on thermal conductivity and thermal energy storage properties of a novel composite phase change material

2018 ◽  
Vol 53 (21) ◽  
pp. 2967-2980 ◽  
Author(s):  
Ahmet Sarı ◽  
Alper Biçer ◽  
Gökhan Hekimoğlu
Keyword(s):  
Thermal Conductivity ◽  
Carbon Nanotubes ◽  
Differential Scanning Calorimetry ◽  
Phase Change ◽  
Phase Change Material ◽  
Phase Change Materials ◽  
Scanning Calorimetry ◽  
Composite Phase Change Materials ◽  
Composite Phase Change Material ◽  
Change Material

Fatty acids are commonly preferred as phase change materials for passive solar thermoregulation due to their several advantageous latent heat thermal energy storage (LHTES) properties. However, further storage container requirement of fatty acids against leakage problem during heating period and also low thermal conductivity significantly limit their application fields. To overcome these drawbacks of capric acid–stearic acid eutectic mixture as phase change material, it was first impregnated with expanded vermiculite clay by melting/blending method and then doped with carbon nanotubes. The effects of carbon nanotubes additive on the chemical/morphological structures and LHTES properties of the composite phase change material and thermal enhanced change phase change materials were investigated by scanning electron microscope, Fourier transform infrared spectroscopy, X-ray diffraction, differential scanning calorimetry and thermogravimetric analysis analysis techniques. The differential scanning calorimetry results showed that the form-stable composite phase change materials and thermal enhanced composite phase change materials have melting temperatures in the range of 24.35–24.64℃ and latent heat capacities between 76.32 and 73.13 J/g. Thermal conductivity of the composite phase change materials was increased as 83.3, 125.0 and 258.3% by carbon nanotubes doping 1, 3 and 5 wt%. The heat charging and discharging times of the thermal enhanced -composite phase change materials were reduced appreciably due to the enhanced thermal conductivity without notably influencing their LHTES properties. Furthermore, the thermal cycling test and thermogravimetric analysis findings proved that all fabricated composites had admirable thermal durability, cycling LHTES performance and chemical stability.

Sign in / Sign up

Export Citation Format

Share Document