The Impacts of Nanoparticle Concentration and Surfactant Type on Thermal Performance of A Thermosyphon Heat Pipe Working With Bauxite Nanofluid

Aydın, Duygu Yılmaz; Çiftçi, Erdem; Gürü, Metin; Sözen, Adnan

doi:10.1080/15567036.2020.1800141

Cited by 30 publications

(9 citation statements)

References 29 publications

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“…Hence, kBrownian = f (P, Cv, ρd, αd, T, D, l) (8) As all the measurements of the thermal conductivity are taken at the 25 o C, so there are no variations in the thermal conductivity with temperature. Similarly, ρ and α of all the nanofluid samples are the same.…”

Section: Mathematical Approach On Thermal Conductivity Of Nanofluidsmentioning

confidence: 99%

“…They have used Triton X-100 (0.2 wt.%) as a surfactant to stabilize nanofluid. Aydin et al [8] used Triton X-100 and Sodium Dodecyl Benzene Sulfonate surfactants to stabilize Bauxite-water nanofluids and found 20.9% enhancement in heat pipe efficiency with SDBS surfactant. Sozen et al [9] used kaolin nanofluid in heat exchanger and found 9.3% enhancement in heat transfer coefficient.…”

Section: Introductionmentioning

confidence: 99%

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Study of the effect of preparation parameters on thermal conductivity of metal oxide nanofluids using Taguchi method

Hemadri

Mane

2021

Journal of Energy Systems

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The optimization of process parameters of the nanofluid preparation process for maximum stability and high heat transfer is an active and important area of research. In this work, the effect of the surfactant material, surfactant weight, and ultrasonication time are studied on distilled water-based CuO, Fe3O4, and CuO+Fe3O4 nanofluids. Taguchi L9 orthogonal array was used for the design of the experiment and 9 samples were prepared using this array. The effect of each level of process parameter on the thermal conductivity is analyzed by calculating Signal to Noise Ratio (SNR) and optimum levels of these parameters are identified. The crucial role of stability in delivering high thermal conductivity nanofluids as predicted by SNR analysis is further confirmed using Analysis of Variance (ANOVA).

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Section: Mathematical Approach On Thermal Conductivity Of Nanofluidsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Study of the effect of preparation parameters on thermal conductivity of metal oxide nanofluids using Taguchi method

Hemadri

Mane

2021

Journal of Energy Systems

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“…The thermal performance of heating and cooling devices is an important parameter for the comparison of the designed systems and the evaluation of their performance. It has been demonstrated in many studies that the COP criterion is particularly important (Tuncer et al , 2021a; Yılmaz Aydın et al , 2021).…”

Section: Introductionmentioning

confidence: 99%

Computational fluid dynamics simulation and experimental investigation of a thermoelectric system for predicting influence of applied voltage and cooling water on cooling performance

Ceviz

Afshari

Muratçobanoğlu

et al. 2022

HFF

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Purpose The purpose of this paper is to experimentally and numerically investigate the cooling performance of the air-to-water thermoelectric cooling system under different working conditions. Design/methodology/approach An air-to-water thermoelectric cooling system was designed and manufactured according to the principle of discrete binary thermoelectric Peltier modules, and the thermal performance, heat transfer rate and average COP values were examined at different cooling water temperatures and voltages applied. Additionally, numerical simulations were performed by computational fluid dynamics approach to investigate the temperature distribution and airflow structure inside the cooling chamber. Findings Analyses were performed using experimental tests and numerical methods. It was concluded that, by decreasing the cooling water temperature from 20 to 5 °C, the average COP increases about 36%. The voltage analysis showed that the efficiency of the system does not always increase as the voltage rises; more importantly, the optimum voltage is different and depends on whether it is desired to increase COP or increase the cooling rate. Originality/value In the studies published in the field of thermoelectric cooling systems, little attention has been paid to the voltage applied and its relationship to other operating conditions. In most cases, the tests are performed at a constant voltage. In this study, several options, including applied voltage and cooling water temperature, were considered simultaneously and their effects on performance have been tested. It was found that under such studies, optimization work should be done to evaluate maximum performance in different working conditions.

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“…However, the physical mechanism of LHP is not well understood and there is still much room to be investigated further. It is noted that although the operating performance can be assessed by the external wall temperature of the loop [21,[33][34][35], some phenomena such as boiling in the core cannot be addressed reasonably due to lack of visualization of internal flow and heat transfer behaviors of the loop. Therefore, visualization study on the LHP is extremely necessary in order to reveal the operating mechanism from different angle.…”

Section: Introductionmentioning

confidence: 99%

Visualization Study on Operating Performance of a Dual Compensation Chamber Loop Heat Pipe Under Acceleration Condition

Xie¹,

Liu²,

Zhang

et al. 2022

SSRN Journal

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The Impacts of Nanoparticle Concentration and Surfactant Type on Thermal Performance of A Thermosyphon Heat Pipe Working With Bauxite Nanofluid

Cited by 30 publications

References 29 publications

Study of the effect of preparation parameters on thermal conductivity of metal oxide nanofluids using Taguchi method

Study of the effect of preparation parameters on thermal conductivity of metal oxide nanofluids using Taguchi method

Computational fluid dynamics simulation and experimental investigation of a thermoelectric system for predicting influence of applied voltage and cooling water on cooling performance

Visualization Study on Operating Performance of a Dual Compensation Chamber Loop Heat Pipe Under Acceleration Condition

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