Nanofluid flow inside a solar collector utilizing twisted tape considering exergy and entropy analysis

Farshad, Seyyed Ali; Sheikholeslami, M.

doi:10.1016/j.renene.2019.04.007

Cited by 119 publications

(25 citation statements)

References 32 publications

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“…Since the application of the nanofluid in various thermal engineering systems was demonstrated, special attention has been paid to the thermo-physical characteristics of the nanofluids [16][17][18]. It has been reported that by using a nanofluid with high concentration at high velocity, a solar thermal collector can operate with 76% higher efficiency than it does with conventional coolants [19]. For example, Yazdanifard et al [20] conducted a series of experiments to investigate the performance of a plate PV/thermal (PV/T) systems working with nanofluids in the laminar and turbulent flow regime.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on Thermal Performance of a PV/T-PCM (Photovoltaic/Thermal) System Cooling with a PCM and Nanofluid

et al. 2019

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In the present work, an experimental investigation is performed to assess the thermal and electrical performance of a photovoltaic solar panel cooling with multi-walled carbon nanotube–water/ethylene glycol (50:50) nano-suspension (MWCNT/WEG50). The prepared nanofluid was stabilized using an ultrasonic homogenizer together with the addition of 0.1vol% of nonylphenol ethoxylates at pH = 8.9. To reduce the heat loss and to improve the heat transfer rate between the coolant and the panel, a cooling jacket was designed and attached to the solar panel. It was also filled with multi-walled carbon nanotube–paraffin phase change material (PCM) and the cooling pipes were passed through the PCM. The MWCNT/WEG50 nanofluid was introduced into the pipes, while the nano-PCM was in the cooling jacket. The electrical and thermal power of the system and equivalent electrical–thermal power of the system was assessed at various local times and at different mass fractions of MWCNTs. Results showed that with an increase in the mass concentration of the coolant, the electricity and power production were promoted, while with an increase in the mass concentration of the nanofluid, the pumping power was augmented resulting in the decrease in the thermal–electrical equivalent power. It was identified that a MWCNT/WEG50 nano-suspension at 0.2wt% can represent the highest thermal and electrical performance of 292.1 W/m2. It was also identified that at 0.2wt%, ~45% of the electricity and 44% of the thermal power can be produced with a photovoltaic (PV) panel between 1:30 pm to 3:30 pm.

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Section: Introductionmentioning

confidence: 99%

Experimental Investigation on Thermal Performance of a PV/T-PCM (Photovoltaic/Thermal) System Cooling with a PCM and Nanofluid

et al. 2019

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“…The limiting solutions for the velocity field in case of ramped and isothermal heating is introduced in this subsection. 1 − e −q q 2 e −y √ a 6 q+a 7 − Gr 0 a 8 q + a 9 1 − e −q q 2 e −y √ a 0 q+Q 1 . For the convenience in the inverse Laplace transform, Eq.…”

Section: Limiting Casesmentioning

confidence: 99%

Shape effect on MHD flow of time fractional Ferro-Brinkman type nanofluid with ramped heating

Saqib

Khan

Shafie

et al. 2021

Sci Rep

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The colloidal suspension of nanometer-sized particles of Fe3O4 in traditional base fluids is referred to as Ferro-nanofluids. These fluids have many technological applications such as cell separation, drug delivery, magnetic resonance imaging, heat dissipation, damping, and dynamic sealing. Due to the massive applications of Ferro-nanofluids, the main objective of this study is to consider the MHD flow of water-based Ferro-nanofluid in the presence of thermal radiation, heat generation, and nanoparticle shape effect. The Caputo-Fabrizio time-fractional Brinkman type fluid model is utilized to demonstrate the proposed flow phenomenon with oscillating and ramped heating boundary conditions. The Laplace transform method is used to solve the model for both ramped and isothermal heating for exact solutions. The ramped and isothermal solutions are simultaneously plotted in the various figures to study the influence of pertinent flow parameters. The results revealed that the fractional parameter has a great impact on both temperature and velocity fields. In the case of ramped heating, both temperature and velocity fields decreasing with increasing fractional parameter. However, in the isothermal case, this trend reverses near the plate and gradually, ramped, and isothermal heating became alike away from the plate for the fractional parameter. Finally, the solutions for temperature and velocity fields are reduced to classical form and validated with already published results.

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“…The exergy efficiency of the water/ nanofluid is also greater compared to that of water. Farshad and Sheikholeslami (2019) investigates numerically exergy loss and heat transfer within a solar collector shown in Fig. 8 with insertion of helical tape inside the pipe.…”

Section: Figmentioning

confidence: 99%

A Review on Exergy Analysis of Nanofluid Flow Through Several Conduits

Kumar¹,

Sharmaa²,

Kumar³

et al. 2020

Frontiers in Heat and Mass Transfer

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This article presents an extensive review on exergy analysis of nanofluid flow through heat exchanger channels. The improvement of exergy efficiency of nanofluid flow through heat exchanger are determined by the net impact of the relative variations in the thermophysical properties of the nanoparticle which are sensitive towards numerous parameters including size and shape, material and concentration as well as base fluid thermal properties. Exergy efficiency of nanofluids flowing through heat exchanger is greater as compare to simple conventional fluids. The augmentation of exergy efficiency in the nanofluid flow through heat exchangers can be achieved by breaking laminar sub layer near the heating surface and can be efficiently done by employing obstacle as roughness elements. However, this gain is accomplished at the expense of decrease in pressure drop. Also exergy efficiency found to be augmented with the rise of the volume fraction with reduction in the value of nanoparticle diameter.

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Nanofluid flow inside a solar collector utilizing twisted tape considering exergy and entropy analysis

Cited by 119 publications

References 32 publications

Experimental Investigation on Thermal Performance of a PV/T-PCM (Photovoltaic/Thermal) System Cooling with a PCM and Nanofluid

Experimental Investigation on Thermal Performance of a PV/T-PCM (Photovoltaic/Thermal) System Cooling with a PCM and Nanofluid

Shape effect on MHD flow of time fractional Ferro-Brinkman type nanofluid with ramped heating

A Review on Exergy Analysis of Nanofluid Flow Through Several Conduits

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