Investigation of a nanofluid-based compound parabolic trough solar collector under laminar flow conditions

Korres, Dimitrios N.; Bellos, Evangelos; Tzivanidis, Christos

doi:10.1016/j.applthermaleng.2018.12.077

Cited by 76 publications

(28 citation statements)

References 55 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A tubular absorber contains a parabolic collector surface and an absorber tube. Korres et al [188] investigated nanofluids-based CPC under laminar flow regime. The study demonstrated a mean and maximum heat transfer coefficient enhancement of 16.16% and 17.41%, respectively.…”

Section: Compound Parabolic Collectors (Cpc)mentioning

confidence: 99%

An updated review of nanofluids in various heat transfer devices

Okonkwo

Wole‐Osho

Almanassra

et al. 2020

J Therm Anal Calorim

236

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

Section: Compound Parabolic Collectors (Cpc)mentioning

confidence: 99%

An updated review of nanofluids in various heat transfer devices

Okonkwo

Wole‐Osho

Almanassra

et al. 2020

J Therm Anal Calorim

236

View full text Add to dashboard Cite

show abstract

“…Korres et al [30] investigated the use of a nanofluid as the working fluid in a CPC under laminar flow conditions. The studied nanofluid was Syltherm 800/CuO with 5 % volumetric concentration and it was compared with the thermal oil (Syltherm 800).…”

Section: Heat and Nanofluid Transfermentioning

confidence: 99%

Advances of Nanofluids in Solar Collectors - A Review of Numerical Studies

Menni¹,

Chamkha²,

Lorenzini³

et al. 2019

MMEP

View full text Add to dashboard Cite

This paper presents a detailed review of the numerical studies carried out by various researchers in order to obtain enhanced heat transfer in free, forced, and mixed convection, under laminar, transition, and turbulent flow regimes, by using nanofluids in different solar collector geometries. Recently, nanofluids have been increasingly used in various solar collector configurations. Nano-sized metallic or non-metallic particles such as Cu, Au, Al2O3, SiO2, TiO2, CuO, etc, were used in the heat transfer fluid for various solid volume fractions. The average size of the particles was less than 100 nm. The higher conductivity of nanoparticles even at low particle concentration results in higher thermal conductivity of the base fluid and improves the thermal characteristics of the system. Nanoparticle size, type and shape are important factors for the thermal conductivity enhancement of the nanofluid with nanoparticles.

show abstract

“…3 Due to their unique thermal properties, nanofluids play an important role in many applications which include heat exchange devices, solar heating equipment, thermal storage systems, and cooling systems. 4 Accordingly, a great deal of experiments and simulations have been performed to study the mechanism for thermal conductivity enhancement of nanofluids. [5][6][7][8][9][10] The thermal conductivity of four kinds of nanofluids (i.e.…”

Section: Introductionmentioning

confidence: 99%

The effect of nanoparticle size and nanoparticle aggregation on the flow characteristics of nanofluids by molecular dynamics simulation

Bao

Zhong

Jie

et al. 2019

Advances in Mechanical Engineering

View full text Add to dashboard Cite

Molecular dynamics simulation is used to investigate the flow characteristics of Cu–Ar nanofluids considering the influence of nanoparticle size and nanoparticle aggregation. Nanofluids viscosity is calculated by equilibrium molecular dynamics based on Green–Kubo equation. Results demonstrate that the viscosity of nanofluids decreases with the increase of nanoparticle size. In addition, nanoparticle aggregation results in the increase of the nanofluids viscosity. Compared with nanoparticle size, nanoparticle aggregation has a larger impact on viscosity. Nanofluids flowing in parallel-plate nanochannels are simulated. The velocity profiles are studied through three nanoparticle sizes (11.55, 14.55, and 18.33 Å) and four nanoparticle aggregate configurations. Results show that the velocity profile of 14.55 Å nanoparticle size is larger than that of other two nanoparticle sizes. As for four nanoparticles, the nanoparticles clustering as a line leads to the maximum velocity profile, while the nanoparticles clustering as a cube causes the minimum velocity profile. Compared with viscosity, nanoparticle aggregation has a greater effect on the velocity profile. When the nanoparticles are evenly distributed, the influence of viscosity on velocity profiles is dominant. Otherwise, the aggregation, aggregate configuration, and distribution of nanoparticles have a dominant impact on the flow characteristics of nanofluids.

show abstract

Investigation of a nanofluid-based compound parabolic trough solar collector under laminar flow conditions

Cited by 76 publications

References 55 publications

An updated review of nanofluids in various heat transfer devices

An updated review of nanofluids in various heat transfer devices

Advances of Nanofluids in Solar Collectors - A Review of Numerical Studies

The effect of nanoparticle size and nanoparticle aggregation on the flow characteristics of nanofluids by molecular dynamics simulation

Contact Info

Product

Resources

About