Preparation and Thermal Property of Phase Change Material Microcapsules by Phase Separation

2007 ◽  
Vol 561-565 ◽  
pp. 2293-2296 ◽  
Author(s):  
Yan Zhang ◽  
Wei Jie Lin ◽  
Rui Yang ◽  
Yin Ping Zhang ◽  
Qing Wu Zhang
Keyword(s):  
Phase Separation ◽  
Phase Change ◽  
Phase Change Material ◽  
Single Phase ◽  
Core Material ◽  
Latent Functionally Thermal Fluid ◽  
Chemical Structures ◽  
Internal Phase ◽  
Apparent Specific Heat ◽  
Change Material

Compared to conventional single-phase fluids, the latent functionally thermal fluid (LFTF), with phase change particles of μm magnitude in size dispersed in it, shows much greater apparent specific heat and heat transfer rate between the fluid and the duct wall. Therefore, for given heat transportation quantity, the mass flow rate and the pump consumption can be reduced greatly. Due to these, LFTF is a promising material in the fields of heat exchanging. In this paper, phase change material (n-tetradecane) was encapsulated by polymethyl mathacrylate (PMMA), polystyrene (PS) and blend of them by internal phase separation method to form microcapsule of 1~2μm in size. The chemical structures were demonstrated by using Fourier transform infrared spectroscopy (FTIR). The core-shell structure was observed using phase contrast microscope. Differential scanning calometry (DSC) results indicated that the phase change enthalpy of the containing 75wt% n-tetradecane as core material reaches 150.7 J/g.

Synthesis and Thermal Properties of Magnesium Sulfate Heptahydrate/Urea Resin as Thermal Energy Storage Micro-Encapsulated Phase Change Material

2017 ◽  
Vol 140 (1) ◽  
Author(s):  
Chenzhen Liu ◽  
Ling Ma ◽  
Zhonghao Rao ◽  
Yimin Li
Keyword(s):  
Particle Size ◽  
Thermal Properties ◽  
Phase Change ◽  
Magnesium Sulfate ◽  
Phase Change Material ◽  
Core Material ◽  
Scanning Calorimetry ◽  
Sulfate Heptahydrate ◽  
Encapsulated Phase Change Material ◽  
Change Material

In this study, micro-encapsulated phase change material (microPCM) was successfully synthesized by emulsion polymerization method, using magnesium sulfate heptahydrate (MSH) as core material and urea resin (UR) as shell material. The surface morphologies and particle size distributions of the microPCM were tested by scanning electron microscopy (SEM) and laser particle size analyzer. The chemical structure of microPCM was analyzed by Fourier-transform infrared spectroscopy (FTIR). The thermal properties were investigated by differential scanning calorimetry (DSC) and thermal conductivity coefficient instrument, respectively.

Preparation and Thermal Property of Phase Change Material Microcapsules by Phase Separation

2007 ◽  
pp. 2293-2296
Author(s):  
Yan Zhang ◽  
Wei Jie Lin ◽  
Rui Yang ◽  
Yin Ping Zhang ◽  
Qing Wu Zhang
Keyword(s):  
Phase Separation ◽  
Thermal Property ◽  
Phase Change ◽  
Phase Change Material ◽  
Change Material

scholarly journals Thermal Characterization of a Heat Management Module Containing Microencapsulated Phase Change Material

Energies ◽  
2019 ◽  
Vol 12 (11) ◽  
pp. 2164
Author(s):  
H.M. Shih ◽  
Yi-Pin Lin ◽  
L.P. Lin ◽  
Chi-Ming Lai
Keyword(s):  
Phase Change ◽  
Phase Change Material ◽  
Wall Temperature ◽  
Heat Dissipation ◽  
Thermal Protection ◽  
Core Material ◽  
Heat Management ◽  
Microencapsulated Phase Change Material ◽  
Aluminum Honeycomb ◽  
Change Material

In this study, a heat management module containing a microencapsulated phase change material (mPCM) was fabricated from mPCM (core material: paraffin; melting temperature: 37 °C) and aluminum honeycomb structures (8 mm core cell). The aluminum honeycomb functioned both as structural support and as a heat transfer channel. The thermal management performance of the proposed module under constant-temperature boundary conditions was investigated experimentally. The thermal protection period of the module decreased as the Stefan number increased; however, increasing the subcooling factor could effectively enhance the thermal protection performance. When the cold-wall temperature TC was fixed at 17 °C and the initial hot wall temperature was 47–67 °C, the heat dissipation of the module was complete 140 min after the hot-wall heat supply was stopped. The time required to complete the heat dissipation increased to 280 min when TC increased to 27 °C.

Super-Cooling Suppression of Microencapsulated PCM

2014 ◽  
Vol 1070-1072 ◽  
pp. 422-426
Author(s):  
Shan Lv ◽  
Zhong Zhu Qiu
Keyword(s):  
Phase Change ◽  
Phase Change Material ◽  
Supply And Demand ◽  
High Energy ◽  
High Energy Density ◽  
Core Material ◽  
Microencapsulated Phase Change Material ◽  
State Changes ◽  
Main Barrier ◽  
Change Material

Microencapsulated Phase change material can absorb and release large amounts of latent heat over a defined temperature range as its physical state changes. The microencapsulated PCM has high energy density and isothermal behavior during charging and discharging and can avoid the contradiction of the energy supply and demand unbalance in time and space. Meanwhile, the shell can separate the phase change material from the outside environment in order to protect the core material. But the super-cooling problem is a main barrier for microencapsulated PCM application. So this paper talks about how to dealing with super-cooling based on related literatures and gives an overview about the methodology in this area.

Review on Phase Change Material Slurries

2013 ◽  
Vol 860-863 ◽  
pp. 946-951
Author(s):  
Jie Chen ◽  
Feng Jiao Liu ◽  
Yi Fei Zheng
Keyword(s):  
Energy Storage ◽  
Phase Change ◽  
Phase Change Material ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Phase Change Materials ◽  
Apparent Specific Heat ◽  
Heat Transfer Capacity ◽  
Change Material ◽  
Better Than

Phase change materials (PCM) have recently received considerable attention in the field of thermal energy storage, due to their intrinsic properties. Phase change material slurry is a novel medium of heat storage and transfer, its apparent specific heat and heat transfer capacity is better than water.PCM slurries are being investigated for active thermal energy storage or as alternatives to conventional single phase fluids because they are pumpable and have advanced heat transport performance with phase change. This review mainly presents the information on PCM emulsions and microencapsulated PCM slurries (mPCM slurries).

Encapsulating an organic phase change material within emulsion-templated poly(urethane urea)s

2019 ◽  
Vol 10 (12) ◽  
pp. 1498-1507 ◽  
Author(s):  
Liora Weinstock ◽  
Rajashekharayya A. Sanguramath ◽  
Michael S. Silverstein
Keyword(s):  
Energy Storage ◽  
Phase Change ◽  
Phase Change Material ◽  
Organic Phase ◽  
Internal Phase ◽  
Oil In Water ◽  
Step Growth ◽  
Step Growth Polymerization ◽  
Micrometer Scale ◽  
Change Material

Interfacial step growth polymerization within oil-in-water high internal phase emulsions was used to synthesize poly(urethane urea) monoliths, consisting of 90% organic phase change material encapsulated within micrometer-scale capsules, for thermal energy storage and release applications.

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