Heat transfer characteristics of a two-phase closed thermosyphons using nanofluids based on sic nanoparticles

Huminic, Gabriela; Huminic, Angel; Fleaca, C.; Dumitrache, Florian

doi:10.18280/ijht.34sp0202

Cited by 5 publications

(4 citation statements)

References 14 publications

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“…F I G U R E 1 3 Comparison between the thermal conductivity of nanofluid from nano-silicon carbide (the current study) and previous studies [79][80][81][82][83] PV/T systems total efficiency (%) that used nano-SiC to form a nanofluid with high thermal conductivity. Certainly, such comparisons may not be fair, as these studies differ among themselves in the method of preparation, the user base fluid, the size, and shape of nanoparticles, as all these factors affect the properties of the produced nanofluid.…”

Section: Referencesmentioning

confidence: 95%

“…Certainly, such comparisons may not be fair, as these studies differ among themselves in the method of preparation, the user base fluid, the size, and shape of nanoparticles, as all these factors affect the properties of the produced nanofluid. As an example of this variation: Nano-SiC with sizes of around 170 nm, 27 nm were used, 79,80,83 respectively. All previous studies used water as a base fluid.…”

Section: Referencesmentioning

confidence: 99%

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Design and experimental evaluation of a PV /T system cooled by advanced methods

Kazem

Chaichan

Sopian

2022

Intl J of Energy Research

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Photovoltaic thermal (PV/T) systems combine a hybrid photovoltaic (PV) module and a flat-plate solar thermal collector. The hybrid design allows for simultaneou increase in thermal energy while providing cooling for the PV module. In doing so, the PV module temperature drops, and therefore the electrical efficiency increases. Another benefit of PV/T collectors is that they allow for the usage of thermal, and PV module in the same area and so that saved space for the consumer. This study presents a numerical (CFD) design and experimental evaluation of a PV/T system cooled by nano-PCM and nanofluid. The selected nanomaterial and PCM were nano-silicon carbide (SiC) and paraffin, respectively. Nano-silicon carbide particles were employed with the paraffin to ameliorate its thermal conductivity. The study examined various aspects of the system such as the SiC particles' optimal mass fraction suspended in both water (base fluid) and paraffin, the optimum mass flow rate of nanofluid, voltage and current of the PV module, thermal energy of solar thermal collector, and the combined PV/T efficiency. The numerical and practical results were very close, which proves the validity of the hypotheses used in building the program. The significance of this study is demonstrated by the result as this design led to maximum thermal and electrical efficiencies of 72% and 13.7%, respectively. The proposed PV/T system introduced better stability of the generated power and thermal efficiency at peak time than the other two studied systems.

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Section: Referencesmentioning

confidence: 95%

Section: Referencesmentioning

confidence: 99%

Design and experimental evaluation of a PV /T system cooled by advanced methods

Kazem

Chaichan

Sopian

2022

Intl J of Energy Research

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“…[1][2][3][4][5][6]. Moreover, some studies focused on the filling ratios, orientation, and nao-fluid technique to achieve a better performance of the conventional heat pipes and thermosiphons [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Characterization of a Closed Loop Pulsating Heat Pipe Using Ethanol with Different Angles

Ahmed¹,

Hussain²,

Jubori³

2021

IJHT

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In low-temperature difference, a closed-loop pulsating heat pipe (CLPHP) can be used as a cooling device due to its capability to transfer heat. The thermal performance of the CLPHP is affected by the working fluids. In this work, the effects of some operating parameters such as using ethanol as working fluid with 0.5 filling ratio, orientation, and power inputs are offered based on experimental study. Where the CLPHP was constructed and tested to achieve a better vision into the effect of orientation of 0°, 15°, 30°, 45°, and 90°, and power input of 50 W, 115 W, 215 W, and 450 W on the heat transfer characteristics and the thermal performance. The results indicated that the minimum thermal resistance can be reached at 0.1585 (℃/W) with an orientation of 90° and a power input of 450 W. The results revealed that the inclination angles and power inputs had considerable influence on the enhancement of the thermal performance of the CLPHP. For the low boiling temperature of the working fluid, the power input is more favorable because of fast startup compared with a high power input that leads to some difficulties like the dry-out phenomenon.

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“…Though the liquid cooling driven by a pump is efficient for high heat dissipation rate, there is a chance of leakage during its operation, which leads to unstable operation of the electronic devices. As a result, two-phase closed loop thermosyphon with evaporative technique is known to be the efficient method that circulates the coolants without the use of any external aid and electrical power [1,2]. The working fluid again comes back into the secondary tank due to buoyancy effect is the advantage of this technique.…”

Section: Introductionmentioning

confidence: 99%

Enhanced heat transfer by thermosyphon method in electronic devices

Kannan¹,

Kamatchi²,

Venkatajalapathi³

et al. 2018

IJHT

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In the present work, the heat dissipation rate and thermal resistance of electronic cooling system is investigated with different coolants by two-phase closed loop thermosyphon method for both steady and unsteady state conditions. The coolants used in this study are acetone, alcohol and petrol respectively and are poured in the created test facility. A square heater of size 35 × 35 mm is fixed in the primary tank and used as a heat source. The heat input is given to the system varies from 10 to 60 W. The temperature of the experimental setup is measured by seven K-type thermocouples which are attached at various locations. Results indicate that (i) the convective heat transfer coefficient increases and thermal resistance decreases with increasing of heat input for all the coolants (ii) the acetone has high heat removal rate of 65.4 % at 60 W due to low boiling point, high latent heat of evaporation and less effect on subcooling, which directly helps in phase change process and heat extraction rate (iii) a maximum reduction in thermal resistance of about 0.523 0 C/W for acetone in comparison with alcohol and petrol by virtue of its high superheat which accelerates to nucleate boiling.

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Heat transfer characteristics of a two-phase closed thermosyphons using nanofluids based on sic nanoparticles

Cited by 5 publications

References 14 publications

Design and experimental evaluation of a PV /T system cooled by advanced methods

Design and experimental evaluation of a PV /T system cooled by advanced methods

Characterization of a Closed Loop Pulsating Heat Pipe Using Ethanol with Different Angles

Enhanced heat transfer by thermosyphon method in electronic devices

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