Modern solar systems driven by nanoparticles-based fatty acids and paraffin wax phase change materials

Nagar, Sumit; Sharma, Kamal

doi:10.1007/s10853-020-05575-6

Cited by 18 publications

(6 citation statements)

References 117 publications

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“…Paraffin wax was used as a common organic PCM to store thermal energy in this research as it is one of the most widely used PCMs in mid-temperature TES applications, such as building air conditioning, solar water distillation, solar collector systems, and electronic thermal management [87][88][89][90]. Paraffin wax has a wide range of applications due to its desirable properties.…”

Section: Thermophysical Properties Of Nepcmmentioning

confidence: 99%

Optimization of Nano-Additive Characteristics to Improve the Efficiency of a Shell and Tube Thermal Energy Storage System Using a Hybrid Procedure: DOE, ANN, MCDM, MOO, and CFD Modeling

2021

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Using nano-enhanced phase change material (NePCM) rather than pure PCM significantly affects the melting/solidification duration and the stored energy, which are two critical design parameters for latent heat thermal energy storage (LHTES) systems. The present article employs a hybrid procedure based on the design of experiments (DOE), computational fluid dynamics (CFD), artificial neural networks (ANNs), multi-objective optimization (MOO), and multi-criteria decision making (MCDM) to optimize the properties of nano-additives dispersed in a shell and tube LHTES system containing paraffin wax as a phase change material (PCM). Four important properties of nano-additives were considered as optimization variables: volume fraction and thermophysical properties, precisely, specific heat, density, and thermal conductivity. The primary objective was to simultaneously reduce the melting duration and increase the total stored energy. To this end, a five-step hybrid optimization process is presented in this paper. In the first step, the DOE technique is used to design the required simulations for the optimal search of the design space. The second step simulates the melting process through a CFD approach. The third step, which utilizes ANNs, presents polynomial models for objective functions in terms of optimization variables. MOO is used in the fourth step to generate a set of optimal Pareto points. Finally, in the fifth step, selected optimal points with various features are provided using various MCDM methods. The results indicate that nearly 97% of the Pareto points in the considered shell and tube LHTES system had a nano-additive thermal conductivity greater than 180 Wm−1K−1. Furthermore, the density of nano-additives was observed to be greater than 9950 kgm−3 for approximately 86% of the optimal solutions. Additionally, approximately 95% of optimal points had a nano-additive specific heat of greater than 795 Jkg−1K−1.

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Section: Thermophysical Properties Of Nepcmmentioning

confidence: 99%

Optimization of Nano-Additive Characteristics to Improve the Efficiency of a Shell and Tube Thermal Energy Storage System Using a Hybrid Procedure: DOE, ANN, MCDM, MOO, and CFD Modeling

2021

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“…25,26 These fatty acids exhibit a range of advantageous properties, including affordability, non-toxicity, and resistance to corrosion. 27,28 Moreover, they generally offer excellent thermal and chemical stability, a high latent heat storage capacity, and appropriate phase transition temperatures and lack issues such as supercooling or phase separation. 26,29 Renewable energy power plants, including solar panels, are recognized sources of high-capacity electricity generation on the global stage.…”

Section: Introductionmentioning

confidence: 99%

Thermal properties of novel phase change materials based on protic ionic liquids containing ethanolamines and stearic acid for efficient thermal energy storage

Mokhtarpour,

Rostami,

Shekaari

et al. 2024

Phys. Chem. Chem. Phys.

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“…However, paraffin is derived from petroleum and coal, which are nonrenewable and unstainable . Fatty acids are a viable alternative to paraffin because they are derived from renewable resources such as vegetable oils and animal fats . Like paraffin, fatty acids are inexpensive and have a high heat-storing capacity .…”

Section: Introductionmentioning

confidence: 99%

“… 14 Fatty acids are a viable alternative to paraffin because they are derived from renewable resources such as vegetable oils and animal fats. 15 Like paraffin, fatty acids are inexpensive and have a high heat-storing capacity. 16 Further, fatty acids are biodegradable and earth-friendly.…”

Section: Introductionmentioning

confidence: 99%

Efficient and Secure Encapsulation of a Natural Phase Change Material in Nanofibers Using Coaxial Electrospinning for Sustainable Thermal Energy Storage

Patel,

Wei,

Singh

et al. 2023

ACS Sustainable Chem. Eng.

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In this study, we present an ecofriendly technique for encapsulating lauric acid (LA), a natural phase change material, within polystyrene (PS) nanofibers through coaxial electrospinning. The resulting LAPS core–sheath nanofibers exhibited a melting enthalpy of up to 136.6 J/g, representing 75.8% of the heat storage capacity of pristine LA (180.2 J/g), a value surpassing all previously reported core–sheath fibers. Scanning electron microscopy revealed uniform LAPS nanofibers free of surface LA until the core LA feed rate reached 1.3 mL/h. As the core LA feed rate increased, the fiber diameter shrank from 2.24 ± 0.31 to 0.58 ± 0.45 μm. Infrared spectra demonstrated a proportional increase in the LA content with rising core LA injection rates. Thermogravimetric analysis found the maximum core LA content in core–sheath nanofibers to be 75.0%. Differential scanning calorimetry thermograms displayed a trend line shift upon LA leakage for LA1.3PS nanofibers. LAPS fibers containing 75.0% LA effectively maintained consistent cycling stability and reusability across 100 heating–cooling cycles (20–60 °C) without heat storage deterioration. The core LA remained securely within the PS sheath after 100 cycles, and the LAPS nanofibers retained an excellent structural integrity without rupture. The energy-dense and form-stable LAPS core–sheath nanofibers have great potential for various thermal energy storage applications, such as building insulation, smart textiles, and electronic cooling systems, providing efficient temperature regulation and energy conservation.

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Modern solar systems driven by nanoparticles-based fatty acids and paraffin wax phase change materials

Cited by 18 publications

References 117 publications

Optimization of Nano-Additive Characteristics to Improve the Efficiency of a Shell and Tube Thermal Energy Storage System Using a Hybrid Procedure: DOE, ANN, MCDM, MOO, and CFD Modeling

Optimization of Nano-Additive Characteristics to Improve the Efficiency of a Shell and Tube Thermal Energy Storage System Using a Hybrid Procedure: DOE, ANN, MCDM, MOO, and CFD Modeling

Thermal properties of novel phase change materials based on protic ionic liquids containing ethanolamines and stearic acid for efficient thermal energy storage

Efficient and Secure Encapsulation of a Natural Phase Change Material in Nanofibers Using Coaxial Electrospinning for Sustainable Thermal Energy Storage

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