An experimental investigation on the effect of Al2O3–H2O nanofluid on the efficiency of flat-plate solar collectors

Yousefi, Tooraj; Veysi, Farzad; Shojaeizadeh, Ehsan; Zinadini, Sirus

doi:10.1016/j.renene.2011.08.056

Cited by 659 publications

(213 citation statements)

References 14 publications

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“…According to [19][20][21], ( ) and are called absorbed energy parameter and removed energy parameter respectively.…”

Section: Energy Analysismentioning

confidence: 99%

“…They demonstrated that 4.34% reduction of entropy generation, 22.15% enhancement of heat transfer coefficient and 1.58% pumping power penalty when using CuO nanofluid compared to that of water. Yousefi et al [19][20][21] carried out three different experimental analyses using MWCNT-H2O and Al2O3-H2O nanofluids in a flat-plate solar collector. They pointed out that he efficiency of flat-plate solar collector increased by 28.3% using 0.2 wt% Al2O3 and 15.63% using 0.4 wt% Al2O3 with surfactant compared to water.…”

Section: Introductionmentioning

confidence: 99%

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Influence of nanofluids on the efficiency of Flat-Plate Solar Collectors (FPSC)

et al. 2017

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Abstract.A numerical investigation is performed using finite volume method to study the laminar heat transfer in a three-dimensional flat-plate solar collector using different nanofluids as working fluids. Three nanofluids with different types of nanoparticles (Ag, MWCNT and Al2O3 dispersed in water) with 1-2 wt% volume fractions are analyzed. A constant heat flux, equivalent to solar radiation absorbed by the collector, is applied at the top surface of the absorber plate. In this study, several parameters including boundary conditions (different volume flow rates, different fluid inlet temperatures and different solar irradiance at Skudai, Malaysia), different types of nanoparticles, and different solar collector tilt angles are investigated to identify their effects on the heat transfer performance of FPSC. The numerical results reveal that the three types of nanofluid enhance the thermal performance of solar collector compared to pure water and FPSC with Ag nanofluid has the best thermal performance enhancement. For all the cases, the collector efficiency increased with the increase of volume flow rate while fluid outlet temperature decreased. It is found that FPSC with tilt angle of 10° and fluid inlet temperature of 301.15 K has the best thermal performance.

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“…According to [19][20][21], ( ) and are called absorbed energy parameter and removed energy parameter respectively.…”

Section: Energy Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of nanofluids on the efficiency of Flat-Plate Solar Collectors (FPSC)

et al. 2017

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“…Finally it was concluded that, carbon black nanofluids have good absorption ability of solar energy and can effectively increase the solar absorption efficiency, hence carbon black nanofluids have high potentials for the utilization in solar application. Yousefi et al [16] carried out an experimental investigations to study the effects of Al2O3/water nanofluid on the efficiency of a flat-plate solar collector. The effect of using water as the working fluid, Al2O3 nanofluid as the working fluid without surfactant and with surfactant on the efficiency of solar collector was investigated.…”

Section: Sani Et Al [12]mentioning

confidence: 99%

“…carried out an examination using the same experimental setup as in their previous work (Yousefi et al, 2012a), to study the effects of water-Multi wall carbon nanotubes (MWCNT)-H2O nanofluid on the efficiency of the flat plate collector. The effect of using water as the working fluid, MWCNT nanofluid as the working fluid without surfactant and with surfactant on the efficiency of solar collector was investigated.…”

Section: Yousefi Et Al [1]mentioning

confidence: 99%

A Review on the Performance of the Nanofluid Based Solar Collectors - Solar Energy

Sharma¹,

Singh²,

Yadav³

et al. 2015

International Conference on Advancements and Recent Innovations in Mechanical, Production and Industrial Engineering

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Using nanofluids as an innovative kind of liquid blend with a trivial volume fraction (in percent) of nanometer-sized solid particles in suspension is a fairly a novel arena or idea. The objective of this presented review paper is to inspect the performance of the nanofluid-based solar collector (NBSC). In past few years for a number of experimental and industrial thermal engineering systems solar energy has proven to be the best input energy source. The scarcity of fossil fuels and environmental contemplations motivated the researchers to utilize alternative energy sources such as solar energy, wind energy, tidal energy etc. Therefore, it is essential to boost the performance of the solar thermal engineering systems. Because of better rheological properties nanofluids are utilized to build up the performance of conventional solar thermal engineering systems. Therefore, major part of this presented review paper lays a main emphasis to investigate the effects of nanofluids on the performance of solar collectors. Some proposals are also given to use the nanofluids for future work in different solar thermal engineering systems such as parabolic trough systems (PTS), solar thermoelectric cells and finally, the challenges of using nanofluids in solar energy devices are reviewed in brief.

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“…Badescu [4] gave an optimal control of flow in solar collector system in case of fully mixed water storage tanks. Yousefi et al [5] stated, that in case of low flow rates, by increasing the flow rate, the collector and the system efficiency is increased as well.…”

Section: Introductionmentioning

confidence: 99%

Examination the effectiveness of flow control in a solar system

Víg¹,

Seres²

2015

HAE

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The present paper examines the benefits of the flow rate control compared with traditional on-off switch-control in case of solar water heating system. The optimal volumetric flow rate of the solar fluid depending on the radiation and the stored water temperature. This flow rate is realized with controlling the frequency of the pump by an ALTIVAR 31 frequency inverter. The paper presents and summarizes the calculated results based on measurement data obtained during the operation with these regulations.

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An experimental investigation on the effect of Al2O3–H2O nanofluid on the efficiency of flat-plate solar collectors

Cited by 659 publications

References 14 publications

Influence of nanofluids on the efficiency of Flat-Plate Solar Collectors (FPSC)

Influence of nanofluids on the efficiency of Flat-Plate Solar Collectors (FPSC)

A Review on the Performance of the Nanofluid Based Solar Collectors - Solar Energy

Examination the effectiveness of flow control in a solar system

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