An Experimental Investigation of a Nanofluid (Al2O3+H2O) Based Parabolic Trough Solar Collectors

Chaudhari, K. S.; Walke, P. V.; Wankhede, Uday S.; Shelke, R. S.

doi:10.9734/bjast/2015/11946

Cited by 47 publications

(10 citation statements)

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“…An experimental investigation was conducted by Chaudhari et al [47] on the effect of 1% volumetric concentration of Al 2 O 3 in Al 2 O 3 /water nanofluid in the thermal characteristic enhancement of PTC. The results showed that the application of nanofluid could enhance the heat transfer coefficient and thermal efficiency by 32% and 7%, respectively, comparing to the base fluid (water).…”

Section: Experimental Studiesmentioning

confidence: 99%

Application of Nanofluids in Thermal Performance Enhancement of Parabolic Trough Solar Collector: State-of-the-Art

et al. 2019

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The present review paper aims to document the latest developments on the applications of nanofluids as working fluid in parabolic trough collectors (PTCs). The influence of many factors such as nanoparticles and base fluid type as well as volume fraction and size of nanoparticles on the performance of PTCs has been investigated. The reviewed studies were mainly categorized into three different types of experimental, modeling (semi-analytical), and computational fluid dynamics (CFD). The main focus was to evaluate the effect of nanofluids on thermal efficiency, entropy generation, heat transfer coefficient enhancement, as well as pressure drop in PTCs. It was revealed that nanofluids not only enhance (in most of the cases) the thermal efficiency, convection heat transfer coefficient, and exergy efficiency of the system but also can decrease the entropy generation of the system. The only drawback in application of nanofluids in PTCs was found to be pressure drop increase that can be controlled by optimization in nanoparticles volume fraction and mass flow rate.

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Section: Experimental Studiesmentioning

confidence: 99%

Application of Nanofluids in Thermal Performance Enhancement of Parabolic Trough Solar Collector: State-of-the-Art

et al. 2019

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“…To the best of the author's knowledge, there are a few experimental studies, which used nanoparticles in PTCs analysis, and the majority of them used water as the base working fluid. Chaudhari et al, Subramani et al, and Bretado et al used Al 2 O 3 with water in a PTC system. According to their results, the maximum thermal efficiency was enhanced up to 24%.…”

Section: Thermal Performance Improvement By Adding Nanoparticlesmentioning

confidence: 99%

An extensive review of various technologies for enhancing the thermal and optical performances of parabolic trough collectors

Abed

Afgan

2020

Int J Energy Res

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A wide range of engineering industrial applications require both the thermal and optical efficiencies of the system to be maximized with a reasonable low penalty for the friction factor and subsequently low losses in pressure. Among the family of concentrated solar power systems, parabolic trough collectors (PTCs), which have recently received significant attention, face similar challenges. The current work presents an extensive review of the PTC systems comparing recent and past technologies, which are widely being used to improve and enhance the thermal and optical efficiencies. Furthermore, the techniques used for single and two-phase flow modeling in numerical simulations, design variables, and experimental processes have been discussed in detail. The article also presents different numerical methods and analytical approaches of implementing the nonuniform solar distribution with different design parameters. Four main technologies are comprehensively addressed to effectively enhance the thermal performance of the PTCs; changing working heat transfer fluids, replacing the working fluids by nanofluids (single and hybrid) that have higher thermal-physical properties than those of base working fluids, inserting different tabulators with various design configurations, and finally combining the advantages of nanofluids and swirl generators in the same application. The article also critically summarizes the studies investigating the enhancement of thermal performance: use of novel design of PTCs and passive heat transfer enhancement techniques. Finally, a wide range of numerical and experimental studies are proposed for the future work related to the aforementioned main technologies. K E Y W O R D Sheat transfer enhancements, nanofluids, parabolic trough solar collectors, solar thermal energy, tabulators, thermal and optical performances

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“…A wide range of the literature is available to use NFs for solar energy exploitation. Chaudhary et al [12] made an experimental study of water-based Al 2 O 3 nanofluid (0.1 wt%) on PTC and achieved 7% enhancement in thermal efficiency as compared to water. Khullar et al [13] studied the performance of PTC containing NFs by numerical modelling using MATLAB and observed approximately 10% enhancement in thermal performance compared to the basefluid.…”

Section: Introductionmentioning

confidence: 99%

Performance analysis of direct absorption-based parabolic trough solar collector using hybrid nanofluids

Khalil

Amjad

Noor

et al. 2020

J Braz. Soc. Mech. Sci. Eng.

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Addition of a small amount of nanoparticles to the working fluids of a parabolic trough collector does not only enhance the heat transfer properties and thermal conductivity of basefluid but also improves the thermal efficiency of the system. The current investigation presents a comparative analysis of experimental performance of a conventional parabolic trough collector and direct absorption parabolic trough collector for capturing solar thermal energy. Two separate nanomaterials, Al 2 O 3 (with high scattering properties) and CuO (with high absorption properties), were selected for the preparation of the hybrid nanofluids. A customized experimental setup was developed to evaluate their photothermal performance. The nanofluid samples in the concentration range of 0.01-0.5 wt% were investigated under a natural solar flux. Thermal efficiency of conventional parabolic trough collector was increased by 31% using hybrid nanofluid as compared to basefluid. The thermal efficiency enhancement of direct absorption parabolic trough collector was observed as 19% higher than that of conventional parabolic trough collector due to higher heat transfer rate, solar trapping and volumetric absorption. These binary nanofluids can be potential working fluids in various applications based on solar thermal energy.

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An Experimental Investigation of a Nanofluid (Al2O3+H2O) Based Parabolic Trough Solar Collectors

Cited by 47 publications

References 0 publications

Application of Nanofluids in Thermal Performance Enhancement of Parabolic Trough Solar Collector: State-of-the-Art

Application of Nanofluids in Thermal Performance Enhancement of Parabolic Trough Solar Collector: State-of-the-Art

An extensive review of various technologies for enhancing the thermal and optical performances of parabolic trough collectors

Performance analysis of direct absorption-based parabolic trough solar collector using hybrid nanofluids

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