Studies on solution crystallization of Na2SO4·10H2O embedded in porous polyurethane foam for thermal energy storage application

Purohit, Bijoy Kumar; Sistla, V. S.

doi:10.1016/j.tca.2018.08.005

Cited by 26 publications

(9 citation statements)

References 26 publications

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“…Thermal study for a composite having solution of sodium sulfate within the open cell polyurethane foam (PU‐PCM composite) was studied using COMSOL Multiphysics software. A computational solving approach for phase change of salt solution within the open cell PU foam was discussed and the model was validated with experimental results 103 …”

Section: Numerical and Simulation Studies For Salt Hydrates As Pcmmentioning

confidence: 99%

Inorganic salt hydrate for thermal energy storage application: A review

Purohit

Sistla

2020

Energy Storage

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Salt hydrates are one of the most common inorganic compounds that are used as phase change material (PCM). These are available for a wide range of phase transition temperature for thermal energy storage (TES) application. They have some most desired properties for TES applications like high latent heat value, good thermal conductivity, nonexpensive, and were nonflammable. Besides these, due to the undesirable properties like phase segregation, supercooling, and corrosion to the containers, this PCM not recommended for TES application. To mitigate these issues and to make salt hydrates suitable in TES application, much research has been carried out in past years. This main highlight of this article is to provide a comprehensive overview of the use of salt hydrates, their applications and summarize the research outcomes reported by various researchers to every issue for its TES application. This summarized information will be useful to those who are interested to work on this research area. Along with this literature focuses on the advantages, disadvantages, and mechanism of salt hydrates for TES system during its thermal cycle process.

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Section: Numerical and Simulation Studies For Salt Hydrates As Pcmmentioning

confidence: 99%

Inorganic salt hydrate for thermal energy storage application: A review

Purohit

Sistla

2020

Energy Storage

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“…Literature also shows that it is possible to use specific coatings that prevent the negative effect of flames of PU foam [11][12][13][14][15][16].To enhance the thermal performance of PU foam, however, literature has also presented several innovative ideas that include the use of PCMs as a sustainable material with little environmental impact.Attempts of incorporation of PCMs for within the matrix of PU foams have shown to be successful in terms of increasing insulation capabilities [17][18][19][20][21][22][23][24][25]. Various methods have been devised for this purpose such as direct amalgamation of PCMs and incorporation of polymer micro-encapsulated PCMs [17][18][19][20][21][22][23][24][25].It is worthy to note that other useful purposes such as thermal storage have been seen to benefit from such incorporation [26][27][28][29].This approach has proven to be promising from the perspective of thermal performance.However, many PCMs are inherently flammable, especially in the case of wax-based PCMs such as paraffin wax, which seems to be of interest to many due to other advantageous characteristics. It is possible that the combination of PU foam and wax-based PCM would create a highly flammable material that is unusable if untreated.…”

Section: Introductionmentioning

confidence: 99%

INFLUENCE OF PHASE CHANGE MATERIALS (PCMs) ON POLYURETHANE (PU) FOAM FIRE-RETARDATION

Mohammed

Aly

Elnokaly

et al. 2022

Journal of Advanced Engineering Trends

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Polyurethane (PU) foam is a material that has long been regarded as a good thermal insulator for building purposes due to many advantageous attributes, such as cost and feasibility. Yet, to further develop its performance, many studies have focused on the potential of using the micro-structure of PU foam as an encapsulation for PCMs. Despite the apparent advantageous outcome of this premise, from the perspective of thermal performance, fire-retardancy issues may pose as a threat. PU foam is known for its inherent poor fire-retardation properties. With the addition of PCMs, especially waxbased, it is possible that the fire-retardancy would worsen. This would translate into additional costs in terms of application of treatments to counter the disadvantageous hazardous properties. In this study,an empirical investigation is carried out with the aim of determining whether addition PCMs to PU foam would influence its retardation, and to which extent.In this context, granules of wax-based PCMs are encapsulated in to closed-cell rigid PU foam via a simplified amalgamation method. Two concentrations of PCM content are presented in this paper. Then, fire-retardancy testing is performed on specimens to compare the performance of the created PU/PCM specimens with this of regular PU specimens. The outcome of this empirical investigationfurther confirms that addition of PCM to PU foam is disadvantageous in terms of fire-retardancy, and that the amount of added PCM is of considerable influence on this.

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“…PCMs can be divided into inorganic and organic PCMs simply by chemical composition. Compared with organic PCMs, inorganic PCMs have high energy storage density and are highly nonflammable and inexpensive [9,10] . Sodium acetate trihydrate, [11] disodium hydrogen phosphate dodecahydrate (DHPD), [12] calcium chloride hexahydrate, [13] sodium sulfate decahydrate, [14] and barium hydroxide octahydrate [15] are commonly used inorganic hydrated salts and important energy storage materials in the field of low‐temperature energy storage.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Thermal Performance Analysis of New Composite Phase Change Materials of Sodium Acetate Trihydrate and Different Additives.

Luo

Zeng

et al. 2022

ChemistrySelect

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A thickener that could address the phase separation problems of sodium acetate trihydrate (SAT) was determined by the gravity sedimentation method. Additionally, a hydrated salt nucleating agent to effectively reduce the supercooling of SAT was sought using the step‐cooling method. Combining these findings, a new SAT composite phase change material (SAT CPCM) was prepared. Additionally, a sample containing expanded graphite (EG) was prepared by melt blending to enhance the thermal conductivity. Our results show that a sample prepared with 1.5 % xanthan gum and 2 % sodium pyrophosphate decahydrate as a hydrated salt nucleating agent basically eliminates supercooling, its thermostability better than that of the composite phase change material using disodium hydrogen phosphate dodecahydrate. A sample with 6 % EG stays molten without leakage at a higher temperature and in the cooling test, the material‘s supercooling degree was only 1.1 °C. After 200 cooling‐heating cycles, the thermal stability was good, with high latent heats of 230.52 kJ/kg and thermal conductivities of 1.789 W(m ⋅ K) −1. This composite phase change material has great application potential in the field of low‐temperature heat storage.

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Studies on solution crystallization of Na2SO4·10H2O embedded in porous polyurethane foam for thermal energy storage application

Cited by 26 publications

References 26 publications

Inorganic salt hydrate for thermal energy storage application: A review

Inorganic salt hydrate for thermal energy storage application: A review

INFLUENCE OF PHASE CHANGE MATERIALS (PCMs) ON POLYURETHANE (PU) FOAM FIRE-RETARDATION

Preparation and Thermal Performance Analysis of New Composite Phase Change Materials of Sodium Acetate Trihydrate and Different Additives.

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