Numerical investigation of influence of the absorber shape on thermal performance of a solar collector

Fattoum, Raoua; Hidouri, A.; Attia, Mohammed El Hadi; Arıcı, Müslüm; Abbassi, Mohamed Ammar; Driss, Zied

doi:10.1007/s10973-022-11744-3

Cited by 8 publications

(2 citation statements)

References 35 publications

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“…The thermal efficiency was 69.4% and 73.2% when the end point of the arc‐shaped rough surface was facing up and down, respectively. Fattoum et al 45 numerically investigated the effect of absorber plate on the thermal performance of flat plate SAC. In the study, the effect of various shapes such as oval, hexagonal and rectangular on thermal performance was investigated and it was observed that the highest thermal efficiency was achieved by using hexagonal shaped absorber plate.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of the effect of using louver baffles on thermal performance in solar air collectors

Tuğan

Işik

2023

Env Prog and Sustain Energy

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Conventional flat plate solar air collectors have advantages such as low cost and simple design. However, their thermal efficiency is lower than that of other designs. The thermal efficiency of these collectors can be increased by detailed examination of parameters such as the shape, size, arrangement and material of the air duct. In this study, it is aimed to improve the thermal efficiency of solar air collectors. The effect of louver baffles, which were not previously used in solar air collectors, on thermal efficiency was investigated numerically via computational fluid dynamics. Three different solar air collectors with flat plates, segmented baffles, and louver baffles were compared in terms of thermal efficiency. In addition, pressure drops in solar air collectors were investigated. The mass flow rate of the air in all collectors is assumed to be 0.04 kg/s. Analyzes were carried out between 09:00 and 16:00. The thermal efficiency values obtained during the day for solar air collectors with flat plate, segmented baffles and louver baffles are 27.66%–56.35%, 29.57%–58.82% and 30.09%–59.47%, respectively. The daily thermal efficiency values obtained for solar air collectors with flat plate, segmented baffles and louver baffles are 46.98%, 49.18% and 49.87%, respectively. The pressure drop for solar air collectors with flat plate, segmented baffles and louver baffles were found to be 4.62, 18.82 and 5.96 Pa, respectively. Based on the data obtained from this study, louver baffles are recommended for use in solar heating applications due to their high thermal efficiency and low pressure drop.

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Section: Introductionmentioning

confidence: 99%

Numerical investigation of the effect of using louver baffles on thermal performance in solar air collectors

Tuğan

Işik

2023

Env Prog and Sustain Energy

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“…It has a simple structure and is easy to manufacture. However, the efficiency is low because the heat transfer fluid is air [4,5]. It has therefore received enormous research attention in the past half-century.…”

Section: Introductionmentioning

confidence: 99%

A Critical Review of All Mathematical Models Developed for Solar Air Heater Analysis

Hai

Phu

2023

ARFMTS

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In this paper, three mathematical models to predict the air collector temperature are reviewed and analyzed. These three models were drawn from 30 publications between 1980 and 2022. The models include lumped model (model 1), a one-dimensional (1D) steady model (model 2), and 1D unsteady model (model 3). The models are established based on the energy balance of the heat exchanger surfaces and the airflow. Solution techniques for models are presented using a system of linear equations, numerical integral, and finite difference method. The results of the sensitivity analysis of the models indicate that the temperatures of the air exiting the collector are similar. Model 3 considers the thickness of the glass cover, absorber plate, and bottom plate thus having the effect of thermal inertia in the morning and afternoon. The maximum difference of outlet air temperature between models 1 and 2 is 0.18 K. The highest outlet air temperature deviation of 0.77 K between models 1 and 3 occurred at 8 AM. When the thicknesses are negligible, the temperature distribution along the air collector of models 2 and 3 is the same. In other words, model 3 should be used when there is the presence of the thickness of the plates and the glass cover.

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Improving the Heat Transfer Performance of a Solar Air Heating Duct with Semicircular Grooves on a Wavy Absorber Plate

Khelkar,

Patwari,

Das

2024

Lecture Notes in Mechanical Engineering

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Numerical investigation of influence of the absorber shape on thermal performance of a solar collector

Cited by 8 publications

References 35 publications

Numerical investigation of the effect of using louver baffles on thermal performance in solar air collectors

Numerical investigation of the effect of using louver baffles on thermal performance in solar air collectors

A Critical Review of All Mathematical Models Developed for Solar Air Heater Analysis

Improving the Heat Transfer Performance of a Solar Air Heating Duct with Semicircular Grooves on a Wavy Absorber Plate

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