A recent examination on the nano coating techniques in heat transfer applications

Armstrong, M.; Sivasubramanian, M.; Palam, N. Selva; Khan, M. Adam; Rajaganapathy, C.

doi:10.1016/j.matpr.2021.02.660

Cited by 7 publications

(4 citation statements)

References 37 publications

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“…A sample of the copper substrate from DPHX was collected and immersed in a 0.06 M Ag-GO hybrid nanofluid for 60 days in a closed glass vessel. The SEM and EDS data demonstrated that due to the oxidation and reduction process with the copper substrate, a specific percentage of Ag-GO nanoparticles were deposited over the copper substrate, as the silver particles are highly reactive with copper (Armstrong et al, 2021b;Armstrong et al, 2021a). This observation revealed that the Ag-GO coating over the copper substrate also improved the heat transfer rate in the DPHX by enhancing the surface chemistry of the pipe material.…”

Section: Influence Of Flow Rate Vs Effectivenessmentioning

confidence: 88%

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Augmenting the double pipe heat exchanger efficiency using varied molar Ag ornamented graphene oxide (GO) nanoparticles aqueous hybrid nanofluids

et al. 2023

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The optimization of heat transfer in heat exchanging equipment is paramount for the efficient management of energy resources in both industrial and residential settings. In pursuit of this goal, this empirical study embarked on enhancing the heat transfer performance of a double pipe heat exchanger (DPHX) by introducing silver (Ag)-graphene oxide (GO) hybrid nanofluids into the annulus of the heat exchanger. To achieve this, three distinct molar concentrations of Ag ornamented GO hybrid nanoparticles were synthesized by blending GO nanoparticles with silver nitrate at molarities of 0.03 M, 0.06 M, and 0.09 M. These Ag-GO hybrid nanoparticles were then dispersed in the base fluid, resulting in the formation of three distinct hybrid nanofluids, each with a consistent weight percentage of 0.05 wt%. Thorough characterization and evaluation of thermophysical properties were performed on the resulting hybrid nanomaterials and nanofluids, respectively. Remarkably, the most significant enhancement in heat transfer coefficient, Nusselt number, and thermal performance index (62.9%, 33.55%, and 1.29, respectively) was observed with the 0.09 M Ag-GO hybrid nanofluid, operating at a Reynolds number of 1,451 and a flow rate of 47 g/s. These findings highlight the substantial improvement in thermophysical properties of the base fluid and the intensification of heat transfer in the DPHX with increasing Ag molarity over GO. In summary, this study emphasizes the vital importance of optimizing the molarity of the material, which also plays a significant role in nanoparticle synthesis to achieve the optimal amplification of heat transfer.

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Section: Influence Of Flow Rate Vs Effectivenessmentioning

confidence: 88%

“…These included the Sieder-Tate equation (Eq. 14) [ (Armstrong et al, 2021b;Hussein, 2017), Hausen equation (Eq. 15) (Brebbia and Rahman, 2000;Lu and Wang, 2008), Stephan equation (Eq.…”

Section: Factorsmentioning

confidence: 99%

Augmenting the double pipe heat exchanger efficiency using varied molar Ag ornamented graphene oxide (GO) nanoparticles aqueous hybrid nanofluids

et al. 2023

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“…The results obtained through the mathematical model developed showed that the coating presence represented 0.64% of losses for heat transfer in the system. According to Armstrong, one should consider the use of coatings in boiler tubes causes reduce in thermal efficiency of less than 1% [31].…”

Section: Modeling the Heat Exchange Yieldmentioning

confidence: 99%

Determination of the Metallic Coating Properties Obtained by Thermal Spraying and Analysis of its Influence on the Heat Transfer Efficiency in the Thermoelectric Power Plant Boiler Tubes

et al. 2022

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“…Tese multiple combinational characteristics make GO nanoparticles suitable for use as mono or hybrid nanoparticles. Several researchers have used GO nanoparticles as a core material and doped them with metal and metal oxide nanoparticles [10][11][12][13][14] to produce novel hybrid nanoparticles or nanofuids. Te thermophysical, optical, chemical, and biological properties of the doped nanoparticles were enhanced through this process.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Empirical Analysis of the Thermophysical Characteristics of GO-Ag Aqueous Hybrid Nanofluid Using Environmentally Friendly Reducing and Stabilizing Agents

Armstrong,

Sivasubramanian,

Selvapalam

et al. 2023

Advances in Materials Science and Engineering

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The remarkable potential of the carbon allotrope graphene and its derivatives in developing hybrid nanofluids has sparked considerable interest among researchers. These carbon nanoparticles offer excellent opportunities to blend with various metal or metal oxide nanoparticle binders to improve their material properties. This study focuses on investigating the synthesis, characterization, and thermophysical properties of silver- (Ag-) infused GO aqueous hybrid nanofluids with various weight percentages (0.025, 0.05, and 0.1 wt.%) using environmentally friendly reducing and stabilizing agents. Characterization of the hybrid nanofluids was performed using XRD, SEM, EDX, a UV-visible spectrometer, a particle size analyzer, and FTIR techniques. The thermal conductivity and viscosity of the GO-Ag hybrid nanofluids were experimentally determined in the temperature range of 293 K–333 K. Notably, the results indicated that the nanofluids with a concentration of 0.1 wt.% exhibited the most significant enhancement in thermal conductivity, with improvements of 15.22% at 293 K and 31.19% at 333 K compared to the base fluid. A mathematical model was developed based on the thermal conductivity experimental results using the response surface methodology (RSM). Overall, the results suggest that the silver nanoparticles-decorated aqueous graphene oxide hybrid nanofluid has promising potential as an innovative heat transfer fluid in various heat transfer applications.

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A recent examination on the nano coating techniques in heat transfer applications

Cited by 7 publications

References 37 publications

Augmenting the double pipe heat exchanger efficiency using varied molar Ag ornamented graphene oxide (GO) nanoparticles aqueous hybrid nanofluids

Augmenting the double pipe heat exchanger efficiency using varied molar Ag ornamented graphene oxide (GO) nanoparticles aqueous hybrid nanofluids

Determination of the Metallic Coating Properties Obtained by Thermal Spraying and Analysis of its Influence on the Heat Transfer Efficiency in the Thermoelectric Power Plant Boiler Tubes

Synthesis and Empirical Analysis of the Thermophysical Characteristics of GO-Ag Aqueous Hybrid Nanofluid Using Environmentally Friendly Reducing and Stabilizing Agents

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