Enhanced Heat Transfer Effectiveness Using Low Concentration SiO2–TiO2 Core–Shell Nanofluid in a Water/Ethylene Glycol Mixture

Arsana, I Made; Muhimmah, Luthviyah Choirotul; Nugroho, Gunawan; Wahyuono, Ruri Agung

doi:10.1007/s10891-021-02312-x

Cited by 5 publications

(3 citation statements)

References 15 publications

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“…This wire and tube heat exchanger consists of a tube coil with certain spacing attached with small diameter wires acting as its extended surface [1][2][3]. The working fluid, for example, refrigerant, nanofluids, or thermal oil, flows inside the tubes, while the ambient air is exposed across the outside surface of the wireattached tube coils, which allows for either natural or forced convection to dissipate the heat from the surface [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Design, Performance, and Optimization of the Wire and Tube Heat Exchanger

Arsana¹,

Wahyuono²

2022

Heat Exchangers

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The wire and tube heat exchanger has been mostly utilized as a condenser unit in various refrigeration systems. As a class of extended surface-based heat exchanger, not only the operating condition but also the geometry of the wire and tube heat exchanger plays a critical role in determining the overall performance of the heat exchanger. Despite the fact that the current designs that include the inline, single-staggered, and woven matrix-based wire and tube heat exchangers already exhibits positive performance, future design and optimization remain challenging from the thermal and fluids engineering point of view. To guide the optimization strategy in the heat exchanger design, this chapter provides an insight into how the geometrical design impacts the performance of various wire and tube heat exchangers, which can be deduced from either the heat exchanger capacity or efficiency.

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Section: Introductionmentioning

confidence: 99%

Design, Performance, and Optimization of the Wire and Tube Heat Exchanger

Arsana¹,

Wahyuono²

2022

Heat Exchangers

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“…There are some articles where composite particles were used to improve the thermal properties of the base fluid. For instance, Arsana et al investigated the composite SiO 2 –TiO 2 nanofluids; however, the 640 nm particle size choice is somewhat questionable, affecting the nanofluid stability [ 17 ]. Gil-Font et al used the method of molecular layer deposition to obtain Sn-PET core–shell particles and make stable nanofluids from them with Therminol66 thermal oil as a base fluid to increase the heat transfer coefficient [ 15 ].…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Rheological Properties and Thermal Conductivity of SiO2–TiO2 Composite Nanofluids Prepared by Atomic Layer Deposition

Várady

Parditka

et al. 2022

Nanomaterials

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In the current research, surface-modified SiO2 nanoparticles were used upon immersion in an applied base fluid (ethylene glycol:water = 1:1). The atomic layer deposition method (ALD) was introduced to obtain a thin layer of TiO2 to cover the surface of SiO2 particles. After the ALD modification, the TiO2 content was monitored by energy dispersive X-ray spectroscopy (EDS). Transmission electron microscopy (TEM) and FT-IR spectroscopy were applied for the particle characterization. The nanofluids contained 0.5, 1.0, and 1.5 volume% solid particles and zeta potential measurements were examined in terms of colloid stability. A rotation viscosimeter and thermal conductivity analyzer were used to study the nanofluids’ rheological properties and thermal conductivity. These two parameters were investigated in the temperature range of 20 °C and 60 °C. Based on the results, the thin TiO2 coating significant impacted these parameters.

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“…In their work, they found that, of their examined nanofluids (consisting of Al 2 O 3 -Cu, TiO 2 -SiO 2 , FWCNT-Fe 3 O 4 , and ND-Fe 3 O 4 ), the best performance was obtained using ND-Fe 3 O 4 nanoparticles when suspended in a water-ethylene glycol mix. Arsana et al [16] examined a similar nanofluid. In their work, they examined a SiO 2 -TiO 2 core-shell nanoparticles at low concentrations in a water/ethylene glycol mixture.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Heat Transfer with Various Aqueous Mono/Hybrid Nanofluids in a Multi-Channel Heat Exchanger

2021

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The use of nanofluids for heat transfer has been examined in recent years as a potential method for augmentation of heat transfer in different systems. Often, the use of nanoparticles in a working fluid does not disrupt the system in significant ways. As a result of this general improvement of a system’s heat transfer capabilities with relatively few detrimental factors, nanofluids and hybrid nanofluids have become an area of considerable research interest. One subcategory of this research area that has been under consideration is the concentration of each of the nanoparticles, leading to either successful augmentation or hindrance. The focus of the current experimental investigation was to examine the resulting impact on heat transfer performance as a result of each nanofluid implemented in an identical three-channel heat exchanger. This work examined the experimental impacts of 0.5 wt% titania (TiO2), 1 wt% titania, a mixture of 0.5 wt% titania and 0.5% silica, and a 0.5 wt% hybrid nanofluid of titania synthetically modified with copper-based nanostructures (Cu + TiO2). The experimental work examined a range of heat flux densities from 3.85 W cm−2 to 7.51 W cm−2, and varying flow rates. Each of the nanoparticles were suspended in distilled water and then mixed using an ultrasonic water bath. The performances of each nanofluid were determined using the local Nusselt number to evaluate the possible thermal enhancement offered by each nanofluid mixture. While the 0.5 wt% Cu + TiO2 hybrid nanofluid did significantly increase performance, the use of a 0.5 wt% TiO2/SiO2 double nanofluid in a three-channel heat exchanger exhibited the greatest performance enhancement, with an average increase of 37.3% as compared to water.

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Enhanced Heat Transfer Effectiveness Using Low Concentration SiO2–TiO2 Core–Shell Nanofluid in a Water/Ethylene Glycol Mixture

Cited by 5 publications

References 15 publications

Design, Performance, and Optimization of the Wire and Tube Heat Exchanger

Design, Performance, and Optimization of the Wire and Tube Heat Exchanger

Experimental Investigation of Rheological Properties and Thermal Conductivity of SiO2–TiO2 Composite Nanofluids Prepared by Atomic Layer Deposition

Experimental Investigation of Heat Transfer with Various Aqueous Mono/Hybrid Nanofluids in a Multi-Channel Heat Exchanger

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