Performance evaluation of sand coated absorber based solar air collector

Reddy, Jagannath; Roy, Sujit; Das, Biplab; Jagadish, Jagadish

doi:10.1016/j.jobe.2021.102973

Cited by 13 publications

(6 citation statements)

References 33 publications

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“…The trends observed in our study (Table 1) are in line with the published results. Notably, the maximum temperature increases were observed to be between 23.5°C and 69.15°C, as reported by Saravanan 25 and Reddy et al, 22 respectively.…”

Section: Resultssupporting

confidence: 79%

An experimental investigation of the thermal performance of solar collectors utilizing finned aluminum can pipes

Boudjema,

Benzenine,

Abboudi

2024

Proceedings of the Institution of Mechanical Engineers, Part C:

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An innovative experimental study is presented to improve the performance of solar collectors designed for solar drying systems, focusing on the use of recycled aluminum can waste and the development of the air solar collector. The latter’s absorber is made up of 10 cans with a diameter of 65 mm, a length of 160 mm and a thickness of 0.3 mm, forming a cylindrical finned pipe. Several collector configurations under identical weather conditions, including four collectors with different rows of rods (4, 8, 12–14 rows) and a single collector, were analyzed and compared. The thermal performance of this new collector model was assessed on the basis of solar fluxes and collector inlet and outlet temperatures, collected during the month of September 2021. Experimental results revealed that this collector can increase the outlet temperature of air from 32°C up to 130°C, in the case of a 14-row collector. The study also showed that, at low flow rates, the can-equipped collector achieves an efficiency of 54% for the case of a 14-row collector, compared with 34% for the simple case, representing a 20% improvement over the single case. The study also showed that, at low flow rates, the can-equipped collector achieves higher outlet temperatures.

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Section: Resultssupporting

confidence: 79%

An experimental investigation of the thermal performance of solar collectors utilizing finned aluminum can pipes

Boudjema,

Benzenine,

Abboudi

2024

Proceedings of the Institution of Mechanical Engineers, Part C:

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show abstract

“…An increase in the mass flow rate allows for more air to pass through the collector along the axial direction, causing the higher pressure to drop with increments in pumping power [25,27,34]. The inclination angle of the solar air collector also affects the pressure drop [35]. Figure 8 represents the effect of the inclination angle and mass flow rate on the pressure drop.…”

Section: Effect Of Flow Ratementioning

confidence: 99%

“…Lakshmi, Layek, and Kumar [122] found that trapezoidal solar air collectors had better thermal performance compared to flat-plate solar air collectors because of the large heat transfer area of the trapezoidal solar air collector. Reddy, Das, and Negi [35] found that cross-corrugated SACs showed much better performance in terms of the environment, energy, and exergy efficiency compared to the reverse trapezoidal absorber because of the enhanced turbulence effect caused by the formation of eddies, which resulted in an enhanced heat transfer rate. Also, it was found that the performance of solar collectors was enhanced by increasing the tilt angle.…”

Section: 𝑒 𝐷mentioning

confidence: 99%

A Comprehensive Review of the Thermohydraulic Improvement Potentials in Solar Air Heaters through an Energy and Exergy Analysis

Hassan,

Nikbakht,

Fawzia

et al. 2024

Energies

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Supply disruptions, uncertainty, and unprecedented price rises of fossil fuels due to the recent pandemic and war have highlighted the importance of using renewable sources to meet energy demands. Solar air collectors (SACs) are major types of solar energy systems that can be utilized for space and water heating, drying, and thermal energy storage. Although there is sufficient documentation on the thermal analyses of SACs, no comprehensive reviews of the exergetic performance or qualitative insight on heat conversion are available. The primary objective of this article is to provide a comprehensive review on the optimum conditions at which the thermal performance of diverse types of solar air collectors is optimized. The effect of operating parameters such as temperature rise, flow rate, geometric parameters, solar radiation, and the Reynolds number on the thermal performance of SACs in terms of thermal hydraulic performance, energy, and exergy efficiencies has been reviewed adaptively. Beyond the operating parameters, a deep investigation is outlined to monitor fluid dynamics using analytical and computational fluid dynamics (CFDs) methodologies in the technology of SACs. In the third phase, thermodynamic irreversibility due to optical losses, thermal losses between absorber and environment, heat losses due to insulation, edge losses, and entropy generation are reported and discussed, which serve as the fundamental tools for optimization purposes.

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“…Numerical and experimental investigation of a solar air collector with internal swirling flow was shown by He et al [36]. Reddy et al [37] provided a performance evaluation of a sand-coated absorber based solar air collector. Dong et al [38] provided a thermal economic analysis of a double-channel solar air collector coupled with a draught fan.…”

Section: Introductionmentioning

confidence: 99%

Experimental Studies on the Influence of Spatial Orientation of a Passive Air Solar Collector on Its Efficiency

et al. 2023

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The solar collector is used to convert solar energy into thermal energy. First, the internal energy of the absorber increases, which is reflected in the increase in its temperature. This energy is transferred to the working fluid in direct contact with the absorber. Depending on the type of fluid, liquid or air solar collectors are distinguished. When the flow of the working medium takes place naturally, without the support of pumps or fans, the solar collector is treated as a passive device. The gravitational movement of air in the inner space of an air solar collector depends on its construction and its spatial orientation in relation to both the source of radiation and the direction of the force of gravity. This paper describes the results of laboratory experimental tests of a prototype passive air solar collector, including: the influence of radiation intensity and the deflection of the solar collector from the vertical on the increase in the temperature of the air flowing through the collector, the mass flow rate of the air and the efficiency of the device. The tests were carried out using an air solar collector with the dimensions 2080 × 1040 × 180 (height × width × thickness) and radiation intensity in the range of I = 0 ÷ 550 W/m2. It was found that the vertical arrangement of the collector does not ensure maximum efficiency of the device.

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Performance evaluation of sand coated absorber based solar air collector

Cited by 13 publications

References 33 publications

An experimental investigation of the thermal performance of solar collectors utilizing finned aluminum can pipes

An experimental investigation of the thermal performance of solar collectors utilizing finned aluminum can pipes

A Comprehensive Review of the Thermohydraulic Improvement Potentials in Solar Air Heaters through an Energy and Exergy Analysis

Experimental Studies on the Influence of Spatial Orientation of a Passive Air Solar Collector on Its Efficiency

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