Effects of helical absorber tube on the energy and exergy analysis of parabolic solar trough collector – A computational analysis

Chakraborty, Oveepsa; Roy, Sujit; Das, Biplab; Gupta, R.

doi:10.1016/j.seta.2021.101083

Cited by 23 publications

(9 citation statements)

References 46 publications

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“…A total of three compositions for nanoparticles (Al 2 O 3 25%-CuO 75%, Al 2 O 3 50%-CuO 50%, and Al 2 O 3 75%-CuO 25%) in water are analyzed with the solar intensity of 708 W/m 2 . 30 The temperature at the flow's inlet is set between 298 and 308 K. 30 At an inlet temperature of 308 K, the entire system performs better. As a result of the study's findings, the discussion follows is predicated on a 308 K inlet temperature.…”

Section: Resultsmentioning

confidence: 99%

“…For varied ratios with a 1% volume concentration in water, Al 2 O 3 ‐CuO is used as the working medium. A total of three compositions for nanoparticles (Al 2 O 3 25%‐CuO 75%, Al 2 O 3 50%‐CuO 50%, and Al 2 O 3 75%‐CuO 25%) in water are analyzed with the solar intensity of 708 W/m 2 30 . The temperature at the flow's inlet is set between 298 and 308 K 30 .…”

Section: Resultsmentioning

confidence: 99%

“…The total result of the investigation indicated an improvement in temperature rise, resulting in a 56% to 71% increase in efficiency, indicating that helical screw tape in the receiver produced improved heat interaction. Chakraborty et al 30 proposed a helical receiver tube instead of a conventional receiver tube for water heating. The outcomes indicated that the exergy and thermal efficiency of the helical receiver tube was 4%‐5% and 4%‐10% higher than the smooth receiver tube.…”

Section: Introductionmentioning

confidence: 99%

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Performance of parabolic trough collector having rotating receiver: Effect of elliptical insert and hybrid nanofluid

Chakraborty

Das

Gupta

2022

Intl J of Energy Research

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Summary This study considers three parabolic trough collector models with rotating receiver tubes and elliptical inserts of two orientations and one with a smooth receiver tube. Hybrid nanofluid is considered as a working medium by mixing copper oxide and aluminum oxide nanoparticles in water. Computational experiments are performed with a 1% concentration in terms of vol. of hybrid nanofluids by considering a mixture of copper oxide and aluminum oxide nanoparticles in water (aluminum oxide 25%‐ copper oxide 75%, aluminum oxide 50%‐ copper oxide 50%, and aluminum oxide 75%‐ copper oxide 25%). Rate of flow for the simulation is considered to vary from 0.016 to 0.033 kg/s. Again, this study focuses on utilizing rotating receiver tubes with a varying velocity of 0‐15 rad/s to overcome the stratification of high temperature at the surface. Results show that enhanced values for the temperature at outlet, heat transfer coefficient, and thermal efficiency are noted for a model with elliptical inserts of major diameter 28 mm (longitudinal orientation) at 15 rad/s receivers speed for nanofluid‐1 (aluminum oxide 75%‐ copper oxide 25%) at 0.033 kg/s. The highest increment in heat transfer coefficient, as well as thermal efficiency for the model with a 28 mm major diameter elliptical insert (longitudinal orientation), is 44.21% and 29.21% respectively. Highlights Use of a spinning receiver reduces the problem of uneven temperature distribution at receiver surface. Maximum 375 K outlet temperature is noted at 15 rad/s for elliptical insert of diameter 28 mm (longitudinal orientation) at 0.016 kg/s. The elliptical insert received the maximum thermal efficiency rating of 82.03%. An elliptical insert in receiver increases pump work by 18.13% than smooth receiver.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Performance of parabolic trough collector having rotating receiver: Effect of elliptical insert and hybrid nanofluid

Chakraborty

Das

Gupta

2022

Intl J of Energy Research

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“…Balls of spherical shape and elliptical inserted for diameter as well as the major diameter of 48 mm are considered respectively. The reason is that in the earlier studies with these kinds of inserts, the best outcomes are noted with 48mm of maximum diameter [2,25]. For the elliptical inserts, two values of minor diameter 12mm and 24mm are being simulated.…”

Section: Physical Modelmentioning

confidence: 99%

“…This study showed an improvement of 0.22% and 0.52% for exergy efficiency and overall efficiency, respectively. Instead of taking a conventional receiver, a structured helical receiver for the LS-2 model of PTC in the case of water heating was examined analytically by Chakraborty et al [25]. This investigation showed that thermal efficiency improved by 4%-10% more with this type of receiver than with the smooth receiver tube of PTC.…”

Section: Introduction:-mentioning

confidence: 99%

Thermal performance evaluation of parabolic trough collector having different inserts and working with hybrid nanofluid

Chakraborty

Das²,

Gupta

2023

Energy & Environment

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This study emphasizes the comparative investigation of the thermal capacity of parabolic solar trough collectors with spherical-shaped balls and two types of elliptical inserts (longitudinal orientation). Hybrid nanofluid is the heat-carrying liquid obtained by mixing CuO and Al2O3 nanoparticles in distilled water. Analytical investigations are conducted for 1% vol. concentration of hybrid nanoparticles in distilled water for varying proportions. Computational analysis is chosen to obtain thermal as well as flow trends in the tube receiver. The outcomes disclosed that 13.3%, 10.02%, and 16% improvements are noted for thermal efficiency, Nusselt number, and thermal performance index with elliptical inserts of minor diameter 12 mm in the receiver, respectively, than spherical ball inserts. The highest pump work of 35 W is associated with spherical inserts at 0.033 kg/s.

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CFD Analysis of Spiral Absorber Tube for Parabolic Solar Collector with Straight Absorber Tube

Chakraborty¹,

Das²,

Gupta³

et al. 2022

Green Energy and Technology

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Effects of helical absorber tube on the energy and exergy analysis of parabolic solar trough collector – A computational analysis

Cited by 23 publications

References 46 publications

Performance of parabolic trough collector having rotating receiver: Effect of elliptical insert and hybrid nanofluid

Performance of parabolic trough collector having rotating receiver: Effect of elliptical insert and hybrid nanofluid

Thermal performance evaluation of parabolic trough collector having different inserts and working with hybrid nanofluid

CFD Analysis of Spiral Absorber Tube for Parabolic Solar Collector with Straight Absorber Tube

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