Effects of a Nanofluid and Magnetic Field on the Thermal Efficiency of a Two‐Phase Closed Thermosyphon

Salehi, H.; Heris, Saeed Zeinali; Sharifi, F; Razbani, Mohammad Amin

doi:10.1002/htj.21043

Cited by 14 publications

(4 citation statements)

References 47 publications

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“…As it was mentioned, working fluid plays key role in the thermal behavior of thermosyphons [9][10]. Using nanofluids, due to their high thermal conductivity [11][12], is a conventional approach which is suggested by several researchers.…”

Section: Figure 1 Schematic Of Thermosyphonmentioning

confidence: 99%

A review on the solar applications of thermosyphons

Ramezanizadeh¹,

Nazari²,

Ahmadi³

et al. 2018

MMEP

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Thermosyphons are used in various energy systems due to their efficient performance in heat transfer. These devices can be employed in several solar energy systems because of their high effective thermal conductivity. The most important solar applications can be listed as PV cooling, desalination units, water heating systems and thermoelectric. In the current study, the mentioned applications and the key findings of the related researches are reviewed and represented. Based on the reviewed publications, the thermal specifications of the thermosyphons affect the overall performance of the systems assisted with thermosyphons. For instance, by using nanofluids, the thermal performance of these devices improves which results in higher efficiency of the systems. Using novel ideas such as using wick in the evaporator section is another approach to achieve more proper performance of the thermosyphons in solar energy systems.

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Section: Figure 1 Schematic Of Thermosyphonmentioning

confidence: 99%

A review on the solar applications of thermosyphons

Ramezanizadeh¹,

Nazari²,

Ahmadi³

et al. 2018

MMEP

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“…In plate heat exchanger, the nanofluids heat transfer is 10.8% more than the based fluid [8]. Salehi et al [9] investigated the thermosyphon with ferrofluid a in a magnetic field.…”

Section: Introductionmentioning

confidence: 99%

Heat transfer and Flow Analysis for Square Tube with Oscillating Electromagnetic Field with Experimental Data by Artificial Neural Network

Sirijaroenpanitch,

Vengsungnle,

Naphon

et al. 2024

Preprint

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The heat transfer and friction factor of ferrofluid passing through a square tube with an oscillating electromagnetic field were investigated experimentally. The impact of electromagnetic rotating direction, flux, and frequency on heat and flow characteristics has been investigated. The Brownian motion of particles has been shown to considerably influence the direction, power, and frequency of electromagnetic rotation, resulting in higher heat transfer. The interruption of electromagnetic flow raises the friction factor even further. In addition, a three-layer back propagation network model is built, with input, hidden, and output layers numbered 5, 17, and 2, respectively. This ANN model performed well statistically, with correlation coefficients ranging from 0.99939 to 0.9996 and mean square errors (MSE) ranging from 0.0106 to 0.0190. The ANN results match the observed data within ± 5% and ± 10% error ranges for heat and flow characteristics, respectively. As a consequence, this machine learning approach might be used to forecast heat exchanger thermal performance.

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“…Their results exhibited that the seasonal temperature has a greater impact on the system performance in winter as compared with summer. Salehi et al 2 predicted the enhancement of the heat transfer characteristics in a two‐phase closed thermosyphon with a CuO/water nanofluid. The artificial neural network was used as an optimization algorithm.…”

Section: Introductionmentioning

confidence: 99%

Assessment of heat transfer and flow characteristics of a two‐phase closed thermosiphon

Ahmed

Jubori

2020

Heat Trans

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In this study, comprehensive modeling and simulations were developed and carried out to perform the investigation of the thermal performance of the enclosed thermosiphon through pool boiling in the evaporator sector and the condensation of the liquid film in the condenser part. To simulate these phenomena, the volume of fluid model was utilized. The simulation modeling using the computational fluid dynamics (CFD) technique was validated with existing experimental results, and a good agreement was reached. The simulation results were presented and evaluated in terms of temperature profiles and contours, the volume of fraction contours, and velocity vector distribution. Moreover, the thermal performance (ie, the heat transfer coefficient and thermal resistance) through the thermosiphon operation was analyzed. From the simulation results, it is found that the thermosiphon performance can be improved by the tilt angle and fill ratio. The results indicated that the optimal performance (ie, a high heat transfer coefficient and a low thermal resistance) was attained at a power input of 250 W, tilt angle of 90°, and fill ratio of 0.5. The established CFD simulations effectively predicted the formation of two‐phase flow pattern and boiling and condensation zones with water at a low power input, termed as geyser boiling.

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Effects of a Nanofluid and Magnetic Field on the Thermal Efficiency of a Two‐Phase Closed Thermosyphon

Cited by 14 publications

References 47 publications

A review on the solar applications of thermosyphons

A review on the solar applications of thermosyphons

Heat transfer and Flow Analysis for Square Tube with Oscillating Electromagnetic Field with Experimental Data by Artificial Neural Network

Assessment of heat transfer and flow characteristics of a two‐phase closed thermosiphon

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