Synthesis and characterization of microencapsulated paraffin with titanium dioxide shell as shape-stabilized thermal energy storage materials in buildings

Cao, Lei; Tang, Fang; Fang, Guiyin

doi:10.1016/j.enbuild.2013.12.028

Cited by 128 publications

(49 citation statements)

References 28 publications

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“…The highest energy saving effect was reached in Ankara, with energy savings of 7.2%. The comfort hours during the occupied hours increased by 15.5% (Seville), 22.9% (Naples), 19.8% (Marseille), 15.8% (Athens) and 20.6% (Ankara).…”

Section: Wallsmentioning

confidence: 98%

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Phase change materials and products for building applications: A state-of-the-art review and future research opportunities

Kalnæs

Jelle

2015

Energy and Buildings

474

232

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Phase change materials (PCM) have received considerable attention over the last decade for use in latent heat thermal storage (LHTS) systems. PCMs give the ability to store passive solar and other heat gains as latent heat within a specific temperature range, leading to a reduction of energy usage, an increase in thermal comfort by smoothing out temperature fluctuations throughout the day and a reduction and/or shift in peak loads. The interest around PCMs has been growing significantly over the last decade. Hence, several commercial products have arrived on the market with various areas of use in building applications. This study reviews commercial state-of-the-art products found on the market and show some of the potential areas of use for PCMs in building applications. Examples of how PCMs can be integrated into buildings, and furthermore building materials and projects using PCMs that have already been realised, have also been reviewed. There seems to be a scarcity of data published on actual performance in real life applications so far. However, many laboratory and full scale experiments have shown positive results on energy savings. Furthermore, future research opportunities have been explored and challenges with the technology as of today have been discussed.

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Section: Wallsmentioning

confidence: 98%

“…Recently materials such as SiO 2 , AlOOH and TiO 2 have also been studied (Cao et al [19]). The advantages of microencapsulation include an increased heat exchange surface giving an increased heat transfer, reduced reactivity with surrounding materials and the PCM's volume can expand without affecting the structure around it.…”

Section: Microencapsulationmentioning

confidence: 99%

Phase change materials and products for building applications: A state-of-the-art review and future research opportunities

Kalnæs

Jelle

2015

Energy and Buildings

474

232

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“…8 Classes of materials which are commonly used as PCMs include paraffins, fatty acids, polyethylene glycols, carbonates, etc. 6,9,10 Compared to other investigated PCMs, stearic acid is a fatty acid which has many signicant merits, including high heat capacity, appropriate melting temperature range, little or even no supercooling during the phase change process, congruent melting, non-toxic, non-corrosion of metal containers, non-ammability, low vapor pressure, low cost, small volume change and thermal stability. [11][12][13] However, there are also some obvious disadvantages of stearic acid, such as leakage and low thermal conductivity, and these drawbacks limit its application.…”

Section: Introductionmentioning

confidence: 99%

“…4,5 Because of their merits, which consist of high energy storage density and environmentfriendly features, PCMs have aroused much attention for their applications in many elds such as the construction industry and transportation. 6,7 PCMs can be divided into three categories according to the chemical composition of the inorganic, organic and eutectic phase change materials. 8 Classes of materials which are commonly used as PCMs include paraffins, fatty acids, polyethylene glycols, carbonates, etc.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2017

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Tannic-acid-templated mesoporous silica nanoparticles (TAMSNs), which were synthesized using a simple, environmentally friendly, cost-effective, and nonsurfactant-based template method, were developed as a matrix for stearic acid to fabricate a novel shape-stabilized phase change material (SA/TAMSN). The characterization results showed that stearic acid was fully adsorbed on the TAMSNs by physical adsorption and the TAMSNs had no effect on the crystal structure of stearic acid. According to the DSC results, although the TAMSNs had a confinement effect on the activity of the stearic acid molecules, the fusion and solidification enthalpies of SA/TAMSN could reach 108.8 J g À1 and 114.1 J g À1, respectively.Additionally, the TGA thermograms indicated that there was no apparent weight loss from 20 C to 223 C for SA/TAMSN, which demonstrated that SA/TAMSNs have excellent thermal stability. All of the results suggested that the TAMSNs could be used as a promising matrix candidate for the shape stabilization of stearic acid.

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“…required for a reasonably rapid hydrolysis reaction to eventually form the silica shell [71]. TiO2 as shell material is used to encapsulate paraffin by the sol-gel method and obtained good thermal stability and encapsulation efficiency [170]. Silica microsphere (hollow spheres) [171], monodisperse microspheres and gigantic hollow structures from silica shell material [172], and monodisperse microspheres with silica material [173] were prepared using this method.…”

Section: Sol-gel Encapsulationmentioning

confidence: 99%

Micro-Encapsulated Phase Change Materials: A Review of Encapsulation, Safety and Thermal Characteristics

2016

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Phase change materials (PCMs) have been identified as potential candidates for building energy optimization by increasing the thermal mass of buildings. The increased thermal mass results in a drop in the cooling/heating loads, thus decreasing the energy demand in buildings. However, direct incorporation of PCMs into building elements undermines their structural performance, thereby posing a challenge for building integrity. In order to retain/improve building structural performance, as well as improving energy performance, micro-encapsulated PCMs are integrated into building materials. The integration of microencapsulation PCMs into building materials solves the PCM leakage problem and assures a good bond with building materials to achieve better structural performance. The aim of this article is to identify the optimum micro-encapsulation methods and materials for improving the energy, structural and safety performance of buildings. The article reviews the characteristics of micro-encapsulated PCMs relevant to building integration, focusing on safety rating, structural implications, and energy performance. The article uncovers the optimum combinations of the shell (encapsulant) and core (PCM) materials along with encapsulation methods by evaluating their merits and demerits.

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Synthesis and characterization of microencapsulated paraffin with titanium dioxide shell as shape-stabilized thermal energy storage materials in buildings

Cited by 128 publications

References 28 publications

Phase change materials and products for building applications: A state-of-the-art review and future research opportunities

Phase change materials and products for building applications: A state-of-the-art review and future research opportunities

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

Micro-Encapsulated Phase Change Materials: A Review of Encapsulation, Safety and Thermal Characteristics

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