Response surface method optimization of innovative fin structure for expediting discharging process in latent heat thermal energy storage system containing nano-enhanced phase change material

Sheikholeslami, M.; Lohrasbi, Sina; Ganji, D.D.

doi:10.1016/j.jtice.2016.08.019

Cited by 54 publications

(12 citation statements)

References 47 publications

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“…The ideal heat is calculated when the temperature of the entire surface of the fin equals the base temperature of the fin. The heat released by the base section of the fin, if the fin length is equal to zero (qwithout fins), can be calculated by equation (9).…”

Section: The Heat Flow Released By the Fin Is In A State Of Unstablementioning

confidence: 99%

“…Although the calculation of the effectiveness of fins, as seen in equation (10), there is no effect of the slope angle, the calculation of the temperature of the fin is influenced by the magnitude of the slope angle as revealed in equations (3) and(5). If the slope of the fin changes[9], then there are also changes in the size of the fin area (Ap), the surface area of the fin in contact with the fluid (As), and the volume (V) of each control volumes. This changes, in the end, have an impact on changes in the temperature distribution that occurs in the fin.…”

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confidence: 99%

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Efficiency and Effectiveness of a Fin Having Pentagonal Cross Section Dependent on the One-Dimensional Position

Vidjabhakti¹,

Purwadi

Mungkasi

2019

Proceedings of the International Conference of Science and Technology for the Internet of Things

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In this paper, we investigate the influence of convection heat transfer coefficient and declivity fin angle to the efficiency and effectiveness of pentagonal fins. The temperature distribution is computed using an explicit finite difference method. The area of the fin is dependent on the one-dimensional position. Our computational experiments show that: (a) the convection heat transfer coefficient influences the efficiency and effectiveness for the steady and unsteady states, that is, the larger the coefficient leads to the smaller the efficiency and effectiveness (b) the declivity fin angle also influences the efficiency and effectiveness of the fin for the steady and unsteady states, that is, the smaller the declivity fin angle leads to the larger effectiveness both for steady and unsteady states, but the efficiency is smaller for steady state.

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Section: The Heat Flow Released By the Fin Is In A State Of Unstablementioning

confidence: 99%

mentioning

confidence: 99%

Efficiency and Effectiveness of a Fin Having Pentagonal Cross Section Dependent on the One-Dimensional Position

Vidjabhakti¹,

Purwadi

Mungkasi

2019

Proceedings of the International Conference of Science and Technology for the Internet of Things

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“…Jamekhorshid et al, [27] implemented response surface methodology for analysis and statistical design of the microencapsulated PCM to evaluate the average particle size and melting latent heat. Sheikholeslami et al, [28] applied RSM to evaluate the performance of latent heat thermal energy storage systems (LHTESS), including PCMs during release (discharging) procedure. The results of hybrid framework of two-factor model and desirability function would cause to have better overview of different dominant variables.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Thermal Conductivity of NanoPCM-Based Graphene by Response Surface Methodology

Aslfattahi

Zendehboudi

Saidur

et al. 2020

ARFMTS

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Common phase change materials (PCMs) possess very low thermal conductivity whilst hybrid PCM with graphene filler could be produced to achieve increased thermal conductivity. This research focuses on the effects of graphene flakes on the thermal conductivity of a PCM (paraffin wax). Three experimental parameters at different levels of average lateral sizes of graphene flakes (4.5, 5 and 7μm), mass fractions (0.1, 0.2 and 0.25 wt.%), and rising temperatures (25-75°C) are considered. For the first time in the literature, the impact of various parameters on the thermal conductivity performance of the nanoPCM-based graphene nano-composites is investigated extensively by adopting response surface methodology supported by central composite design. Thermal conductivity prediction is proposed by a new general correlation and a promising value of the coefficient of determination (R2) higher than 0.88. Amongst the investigated various variables in terms of impact on thermal conductivity, the temperature is identified as the most influential parameter on response variables. According to the implemented optimization technique, for the composite with the average graphene flake size of 4.5 µm, the optimum value of the thermal conductivity is found 0.275 W/m K at the mass fraction of 0.186 wt.% and temperature of 69.73°C.

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“…The results confirmed the importance of fins and showed that the fin parameters have a significant effect on the solidification time. In another study conducted by Sheikholeslami et al [17], fins with an innovative structure are applied for performance enhancement, and the response surface method is used to find a better fin array. A pretty good enhancement is obtained during the discharging process of TES, especially with the optimized snowflake shaped fin.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study of a New Solar Vacuum Tube Integrating with Phase Change Material

et al. 2019

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In this work, a new solar vacuum tube (SVT) integrating with phase change material is introduced and numerically investigated. The mathematical model and the numerical solution of phase change heat transfer is introduced. The heat transfer of the solar energy collection system during the energy storage process is simulated. Solid-liquid phase change characteristics of the SVT with paraffin inside is analyzed. Optimization analysis of fin structure parameters (fin thickness and fin spacing) in the vacuum tube is conducted. The results showed that the metal fin has a great effect on the phase change heat transfer of paraffin in SVTs. The closer the paraffin is to the fins, the more uniform the paraffin temperature is and the sooner the paraffin melts. As the fin thickness increases and the spacing between the fins decreases, the melting time of the paraffin decreases. Meanwhile, the effect of fin spacing on the overall heat transfer performance of the phase change energy storage tube is larger than the effect of the fin thickness. When the fin thickness is 2 mm, the melting time of paraffin with a fin spacing of 80 mm is 21,000 s, which is almost three times of that with a fin spacing of 10 mm (7400 s). Therefore, decreasing fin spacing is an effective way of enhancing phase change heat transfer. When the total fin volume is constant, a SVT with small fin space and small fin thickness performs better in heat transfer performance.

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Response surface method optimization of innovative fin structure for expediting discharging process in latent heat thermal energy storage system containing nano-enhanced phase change material

Cited by 54 publications

References 47 publications

Efficiency and Effectiveness of a Fin Having Pentagonal Cross Section Dependent on the One-Dimensional Position

Efficiency and Effectiveness of a Fin Having Pentagonal Cross Section Dependent on the One-Dimensional Position

Optimization of Thermal Conductivity of NanoPCM-Based Graphene by Response Surface Methodology

Numerical Study of a New Solar Vacuum Tube Integrating with Phase Change Material

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