Experimental performance analysis of a novel sand coated and sand filled polycarbonate sheet based solar air collector

Das, Biplab; Mondol, Jayanta Deb; Negi, Sushant; Smyth, Mervyn; Pugsley, Adrian

doi:10.1016/j.renene.2020.10.054

Cited by 25 publications

(7 citation statements)

References 29 publications

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“…Here the research concerned a non-concentrating type of solar collector used for drying purposes. Some of the literature reviewed is dedicated to evaluating the pros and cons of their proposed designs (e.g., Karim and Hawlader, 2006;Koca et al, 2008;Naphon and Kornkumjayrit, 2008;Natarajan and Sathish, 2009;El-Sebaii and Al-Snani, 2010;Hans et al, 2010;Krishnananth and Kalidasa Murugavel, 2013;Nowzari et al, 2014;Chaichan et al, 2016;Dissa et al, 2016;Sharma and Kalamkar, 2017;Farajzadeh et al, 2018;Ural, 2019;Ammar et al, 2020;Das et al, 2021;Dutta et al, 2021), and a similar comparative approach is adopted here also.…”

Section: Introductionmentioning

confidence: 99%

“…Increasing the mass flow rate by 87% caused the energy storage to drop by 10%-24%. However, this work did not encompass the pressure and temperature distribution across the polycarbonate sheet (Das et al, 2021). In another restructured solar collector, a V-groove absorber plate was examined to determine the overall improvement in the convective heat transfer of the model.…”

Section: Introductionmentioning

confidence: 99%

“…Manufacturing and material science provided the foundation for much of the work covered in the literature review (e.g., Karim and Hawlader, 2006;Koca et al, 2008;Naphon and Kornkumjayrit, 2008;Natarajan and Sathish, 2009;El-Sebaii and Al-Snani, 2010;Hans et al, 2010;Krishnananth and Kalidasa Murugavel, 2013;Nowzari et al, 2014;Chaichan et al, 2016;Dissa et al, 2016;Sharma and Kalamkar, 2017;Farajzadeh et al, 2018;Ural, 2019;Ammar et al, 2020;Das et al, 2021;Dutta et al, 2021). The aspect of medium properties was discussed sporadically in some of the studies (e.g., Hans et al, 2010;Kumar et al, 2017;Dhaundiyal and Atsu, 2022).…”

Section: Introductionmentioning

confidence: 99%

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Rheological Behavior of Air in the Two-Pass Solar Collector

Dhaundiyal

2022

Front. Energy Res.

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This study pivoted on the flow behavior of air streams across solar air collectors provided with wooden baffles under the absorber plates. The two-pass system was used for both flat and finned surfaces. The von Kármán momentum integral and Blasius equations were solved with the help of PDPE and ODE45 techniques. The solution was assumed to be a part of the initial value problem (IVP). The energy analysis of both solar air collectors was carried out using the Hottel–Whillier–Bliss equation (HWB) equation. The Sankey diagram was used for energy distribution across the solar collectors. The gray box modeling approach was adopted to comprehend the airflow behavior across the channel. The objective of this study is to examine the intrinsic behavior of the proposed design. The displacement of boundary to compensate for the momentum of air stream (θt) decreased by 31.25%–62.50% with an increase in mass flow rate (m)˙of 24.69%–49.38% for the flat plate collector (FPC). Similarly, the shear stress posed by the absorber plate (τw) dropped by 15.89%–37.20% with the augmentation of the mass flow rate. The momentum thickness for the flat plate with triangular fin (FPTF) increased relatively by 31.25%, compared to FPC at 8.10 g·s−1. The estimated value of collector efficiency (ηI) FPTF soared up by 4%–11.51% when it was juxtaposed against the corresponding values derived for FPC. The wall shear stress near the absorber plate followed that of a second-order Gaussian model. It was noticed in this study that the addition of the fin slowed down the shear effect and the momentum defect of airstream at the same mass flow rate.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Rheological Behavior of Air in the Two-Pass Solar Collector

Dhaundiyal

2022

Front. Energy Res.

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“…An 87% increase in the mass flow rate of the air reduced thermal energy storage by 10-24%. The work did not include the effects of pressure and temperature on the heat transfer across the proposed design [4]. Similarly, a V-type groove absorber plate was used to enhance the convective heat transfer of the collector by increasing the surface area of the heat transfer as well as the thermal efficiency of the system [5,6].…”

Section: Introductionmentioning

confidence: 99%

The Stack Effect on the Thermal-Fluid Behaviour of a Solar Collector

Dhaundiyal

Gebremicheal

2022

Energies

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The article investigates the thermal behaviour of a solar collector retrofitted with a natural draught unit. The objective of this work is to draw a comparative line between a system that is equipped with a circular vertical channel and the conventional one. The effectiveness of the solar heating system and how to further improve the prevailing system are examined in this study. The flat plate solar collector was used to assess the dynamics of the system. The Hottel–Whillier–Bliss equation was used to obtain the useful heat gain rate. The instantaneous collector efficiency was reduced by 22.84%. The net heat loss encountered with natural draught was augmented by 10.89%. The net pressure drop along the length of the collector was increased when a solar collector related to the circular chimney. The stagnant temperature of the collector with the natural draught was decreased by 3.20%. The heat loss to the surrounding was computed to be 33.94% of the net energy received by a solar collector connected with the circular stack. The Fanning friction factor for airflow was reduced in the system equipped with natural draught. The static pressure was marginally dropped at the inlet, whereas it was steeply increased at the outlet of the solar collector. The static pressure would be the same for both systems at collector length l = 0.84 m. The inference can be deducted from the comparative analysis that the air stream flow behind the collector plate and could provide better prospects for a collector unit equipped with natural draught at the exhaust end of the solar dryer.

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“…Using these methods caused thermal performance to increase by 18.8% compared to a conventional SAH. Das et al [14] investigated the heat dynamics of a sand-filled SAH and compared the results with a SAH using an aluminum absorber. The used sands simultaneously acted as coating and thermal storage units and improved performance by nearly 39% higher performance than the SAH using the aluminum absorber.…”

mentioning

confidence: 99%

Performance of New Absorber Coating Strategy in Solar Air Heaters: An Experimental Case Study

Mahmoudi

Farzan

Zaim

2022

IJEE

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Asphalt materials commonly have high absorption coefficients, and their surface temperature reaches as high as 80 o C during daytime hours since their surfaces are exposed to solar radiation for long periods. Hence, asphalt pavements can easily be converted to solar air heaters (SAHs) to collect solar energy. Even though asphalt materials have low thermal conductivity, resulting in a weak convection heat exchange rate between the flowing air and asphalt surface. The current experimental study analyzes utilizing aluminum shavings as asphalt coating materials to improve SAHs' thermal performance. To this aim, a serpentine SAH prototype was constructed, and several sensors were utilized to monitor its dynamic thermal response. Black-painted aluminum shavings were utilized as coating materials to improve the convective heat exchange rate and increase the roughness of the absorber surface. Two scenarios were considered, including the uncoated absorber plate and coated one with 0.2 kg aluminum shavings. The experiments were carried out for two air mass flow rates of 0.02 kg/s and 0.03 kg/s under field conditions. Based on the air mass flow rate, the coated absorber reaches higher temperatures, approximately 5 o C to 9 o C, than the uncoated one. The acquired results illustrate that the coated SAH has nearly 4 o C to 5 o C higher maximum exhaust air temperature; hence, the coating strategy improves the thermal efficiency by 24.75% and 44% in two air mass flow rates of 0.02 kg/s and 0.03 kg/s, respectively.

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Experimental performance analysis of a novel sand coated and sand filled polycarbonate sheet based solar air collector

Cited by 25 publications

References 29 publications

Rheological Behavior of Air in the Two-Pass Solar Collector

Rheological Behavior of Air in the Two-Pass Solar Collector

The Stack Effect on the Thermal-Fluid Behaviour of a Solar Collector

Performance of New Absorber Coating Strategy in Solar Air Heaters: An Experimental Case Study

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