Comparative study of different functionalized graphene-nanoplatelet aqueous nanofluids for solar energy applications

Vallejo, Javier P.; Mercatelli, Luca; Martina, Maria Raffaella; Rosa, Daniele Di; Dell’Oro, A.; Lugo, Luis; Sani, Elisa

doi:10.1016/j.renene.2019.04.075

Cited by 27 publications

(25 citation statements)

References 67 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…to compare with the works published in the literature [42,43]. At 30 °C, the base fluid (therminol 66) had the lowest THI, such that the performance of the system was 10% lower than water.…”

Section: Temperature Of the Tankmentioning

confidence: 90%

“…Water was selected as a reference case in order Figure 7 shows thermo-hydraulic index (THI) calculated with Equation (6), with the temperature of the tank shown for various nanofluids at 1800 Re. Water was selected as a reference case in order to compare with the works published in the literature [42,43]. At 30 • C, the base fluid (therminol 66) had the lowest THI, such that the performance of the system was 10% lower than water.…”

Section: Convective Heat Transfer Coefficientmentioning

confidence: 99%

See 1 more Smart Citation

Assessment of Iron Oxide (III)–Therminol 66 Nanofluid as a Novel Working Fluid in a Convective Radiator Heating System for Buildings

et al. 2019

View full text Add to dashboard Cite

This work investigates the use of iron oxide (III)–therminol 66 oil-based nanosuspensions in a convective heating system with potential heating applications in the buildings sector. In an experimental study, characteristics of nanofluids were measured, including heat capacity, thermal conductivity, and density. The influences of mass flow rate and concentration of nanofluid on various parameters were quantified, such as pressure loss, friction coefficient, and heat transfer rate. For a concentration of 0.3 wt.%, the heat transfer increased by 46.3% and the pressure drop increased by 37.5%. The latter is due to the higher friction and viscosity of the bulk of the nanofluid. Although the pressure drop is higher, the thermo-hydraulic efficiency still increased by 19%. As a result, iron oxide (III)–therminol 66 presented reasonable thermal performance, higher heat transfer coefficient, and a lower pressure drop value (19% better performance in comparison with water) for the air–liquid convective system. Results also showed that for nanosuspensions at 0.3 wt.%, the friction factor of the system increased by 10% in comparison with the performance of the system with water.

show abstract

Section: Temperature Of the Tankmentioning

confidence: 90%

Section: Convective Heat Transfer Coefficientmentioning

confidence: 99%

Assessment of Iron Oxide (III)–Therminol 66 Nanofluid as a Novel Working Fluid in a Convective Radiator Heating System for Buildings

et al. 2019

View full text Add to dashboard Cite

show abstract

“…A combined PVT/PCM system using nanofluids has proved to be an effective coolant in enhancing the thermal conductivity of PVT collectors [202]. Other studies related to nanofluids in solar collectors investigated the photothermal properties of various mono and hybrid nanofluids [203][204][205][206][207][208][209][210][211][212], the impact of magnetic fields on the thermal performance of nanofluids in a solar collector [213], the forced convective behaviour of nanoparticles inside a solar collector [214] and more recently the application of ANN models for the prediction of nanofluids performance in solar collectors [215][216][217]. Other studies investigating the application of nanofluids in various solar collectors are presented in Table 7.…”

Section: Photovoltaic Thermal Collectors (Pvt)mentioning

confidence: 99%

An updated review of nanofluids in various heat transfer devices

Okonkwo

Wole‐Osho

Almanassra

et al. 2020

J Therm Anal Calorim

233

View full text Add to dashboard Cite

The field of nanofluids has received interesting attention since the concept of dispersing nanoscaled particles into a fluid was first introduced in the later part of the twentieth century. This is evident from the increased number of studies related to nanofluids published annually. The increasing attention on nanofluids is primarily due to their enhanced thermophysical properties and their ability to be incorporated into a wide range of thermal applications ranging from enhancing the effectiveness of heat exchangers used in industries to solar energy harvesting for renewable energy production. Owing to the increasing number of studies relating to nanofluids, there is a need for a holistic review of the progress and steps taken in 2019 concerning their application in heat transfer devices. This review takes a retrospective look at the year 2019 by reviewing the progress made in the area of nanofluids preparation and the applications of nanofluids in various heat transfer devices such as solar collectors, heat exchangers, refrigeration systems, radiators, thermal storage systems and electronic cooling. This review aims to update readers on recent progress while also highlighting the challenges and future of nanofluids as the next-generation heat transfer fluids. Finally, a conclusion on the merits and demerits of nanofluids is presented along with recommendations for future studies that would mobilise the rapid commercialisation of nanofluids.

show abstract

“…The experimental results showed a good match with the prediction of the wave optics module. Vallejo et al [ 193 ] investigated the optical properties of water-based nanofluids containing polycarboxylate chemically modified graphene nanoplatelets (P-GNPts) and sulfonic acid-functionalized graphene nanoplatelets (S-GNPts) with concentrations ranging from 0.005 wt% to 0.05 wt%. The prepared nanofluids had moderate stability and good sunlight absorption.…”

Section: Carbon-based Nanofluids For Direct Solar Absorptionmentioning

confidence: 99%

Carbon Nanomaterial-Based Nanofluids for Direct Thermal Solar Absorption

et al. 2020

View full text Add to dashboard Cite

Recently, many scientists have been making remarkable efforts to enhance the efficiency of direct solar thermal absorption collectors that depends on working fluids. There are a number of heat transfer fluids being investigated and developed. Among these fluids, carbon nanomaterial-based nanofluids have become the candidates with the most potential by the heat absorbing and transfer properties of the carbon nanomaterials. This paper provides an overview of the current achievements in preparing and exploiting carbon nanomaterial-based nanofluids to direct thermal solar absorption. In addition, a brief discussion of challenges and recommendations for future work is presented.

show abstract

Comparative study of different functionalized graphene-nanoplatelet aqueous nanofluids for solar energy applications

Cited by 27 publications

References 67 publications

Assessment of Iron Oxide (III)–Therminol 66 Nanofluid as a Novel Working Fluid in a Convective Radiator Heating System for Buildings

Assessment of Iron Oxide (III)–Therminol 66 Nanofluid as a Novel Working Fluid in a Convective Radiator Heating System for Buildings

An updated review of nanofluids in various heat transfer devices

Carbon Nanomaterial-Based Nanofluids for Direct Thermal Solar Absorption

Contact Info

Product

Resources

About