Numerical and experimental study of the heat transfer and hydraulic performance of solar air heaters with different baffle positions

Bensaci, Charaf-Eddine; Moummi, Abdelhafid; Flor, Francisco José Sánchez de la; Jara, Enrique Ángel Rodríguez; Rincón-Casado, A.; Ruiz–Pardo, Álvaro

doi:10.1016/j.renene.2020.04.017

Cited by 103 publications

(24 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…As mentioned above, thermohydraulic efficiency measurement is important for assessing SAH performance. To evaluate the overall system performance, the principle is to simultaneously examine both the hydrodynamics and the heat transfer [79]. The collector's thermohydraulic performance was popularized by Webb and Eckert [80].…”

Section: International Journal Of Photoenergymentioning

confidence: 99%

See 1 more Smart Citation

Applications of Metaheuristic Algorithms in Solar Air Heater Optimization: A Review of Recent Trends and Future Prospects

Niyonteze

Zou

Asemota

et al. 2021

International Journal of Photoenergy

View full text Add to dashboard Cite

A transition to solar energy systems is considered one of the most important alternatives to conventional fossil fuels. Until recently, solar air heaters (SAHs) were among the other solar energy systems that have been widely used in various households and industrial applications. However, the recent literature reveals that efficiencies of SAHs are still low. Some metaheuristic algorithms have been used to enhance the efficiencies of these SAH systems. In the paper, we do not only discuss the techniques used to enhance the performance of SAHs, but we also reviewed a majority of published papers on the applications of SAH optimization. The metaheuristic algorithms include simulated annealing (SA), particle swarm optimization (PSO), genetic algorithm (GA), artificial bee colony (ABC), teaching-learning-based optimization (TLBO), and elitist teaching-learning-based optimization (ETLBO). For this research, it should be noted that this study is mostly based on the literature published in the last ten years in good energy top journals. Therefore, this paper clearly shows that the use of all six proposed metaheuristic algorithms results in significant efficiency improvements through the selection of the optimal design set and operating parameters for SAHs. Based on the past literature and on the outcomes of this paper, ETLBO is unquestionably more competitive than ABC, GA, PSO, SA, and TLBO for the optimization of SAHs for the same considered problem. Finally, based on the covered six state-of-the-art metaheuristic techniques, some perspectives and recommendations for the future outlook of SAH optimization are proposed. This paper is the first-ever attempt to present the current developments to a large audience on the applications of metaheuristic methods in SAH optimization. Thus, researchers can use this paper for further research and for the advancement of the proposed and other recommended algorithms to generate the best performance for the various SAHs.

show abstract

Section: International Journal Of Photoenergymentioning

confidence: 99%

“…The collector's thermohydraulic performance was popularized by Webb and Eckert [80]. Thus, the thermohydraulic performance of a coarse SAH is expressed as follows [79][80][81][82][83][84][85]:…”

Section: International Journal Of Photoenergymentioning

confidence: 99%

Applications of Metaheuristic Algorithms in Solar Air Heater Optimization: A Review of Recent Trends and Future Prospects

Niyonteze

Zou

Asemota

et al. 2021

International Journal of Photoenergy

View full text Add to dashboard Cite

show abstract

“…Mohammadshahi et al [26] numerically reported on the usage of a single flexible fin inside a duct for heat transfer augmentation by varying parameters and revealed an increase in Nusselt number and a reduction in pressure loss. Bensaci et al [27] numerically evaluated the optimal position of baffles for the best thermal performance and developed an experimental setup on the basis of CFD analysis. Xie et al [28] performed CFD analysis for a dimpled (tear drop dimples) tube in ANSYS Fluent 17.2 for thermo-hydraulic performance and compared the results with the spherical and elliptical drops dimpled tube.…”

Section: Introductionmentioning

confidence: 99%

Parametric CFD Thermal Performance Analysis of Full, Medium, Half and Short Length Dimple Solar Air Tube

Alam

Souayeh

2021

Sustainability

View full text Add to dashboard Cite

In the present decade, research regarding solar thermal air heaters (SAHs) has noticed a continuous progression in thermo-hydraulic performance augmentation approaches. There now exists a wide variety of thermo-hydraulic performance augmentation approaches and researchers have designated various structures. Nevertheless, there seems to be no generalization to any of the approaches employed. The present numerical investigation reports on the thermo-hydraulic characteristics and thermal performance for flow through a varied length (full, medium, half, and short length) dimple solar air heater (SAH) tube. The study highlights recent developments on enhanced tubes to augment heat transfer in SAH. The influence of different length ratio, dimple height ratio (H), and pitch ratio (s) on thermo-hydraulic characteristics have been investigated in the Reynolds number (Re) range from 5000 to 25,000. Air is used as the working fluid. The commercial software ANSYS Fluent is used for simulation. The shear stress transport (SST) model is used as the turbulence model. Thermal energy transport coefficient is increased in the full-length dimple tube (FLDT), compared to the medium-length dimple tube (MLDT), half-length dimple tube (HLDT) and short-length dimple tube (SLDT). Similarly, the pitch ratio (s) has more influence on Nusselt number (Nu) compared to the dimple height ratio (H). The friction factor decreases with an increase in pitch ratio. Nu increases and f decreases with increasing Re for all combinations of H and s. Low s and higher H yields high enhancement of HT and PD. Integration of artificial roughness on the tube increases the values of Nu and f by 5.12 times and 77.23 times for H = 0.07, s = 1.0 at Re value of 5000 and 25,000, respectively, in regard to the plain tube. For all the tested cases, the thermo-hydraulic performances (η) are greater than unity.

show abstract

“…There are several research works about technical solutions to increase the system performance [7][8][9]. The following ideas including the use of extruded surfaces such as baffles [10], straight and helicoidal spring shaped fins [11,12], twisted-rib roughness [13], hyperbolic ribs [14], and employing V-shaped absorbers [15] were addressed by some investigations. The energy and exergy performances of an offset finned solar air heater were numerically investigated by Rai et al [16].…”

Section: Introductionmentioning

confidence: 99%

Performance Augmentation of Solar Air Heater for Space Heating Using a Flexible Flapping Guide Winglet

2021

IJEE

View full text Add to dashboard Cite

Numerical and experimental study of the heat transfer and hydraulic performance of solar air heaters with different baffle positions

Cited by 103 publications

References 37 publications

Applications of Metaheuristic Algorithms in Solar Air Heater Optimization: A Review of Recent Trends and Future Prospects

Applications of Metaheuristic Algorithms in Solar Air Heater Optimization: A Review of Recent Trends and Future Prospects

Parametric CFD Thermal Performance Analysis of Full, Medium, Half and Short Length Dimple Solar Air Tube

Performance Augmentation of Solar Air Heater for Space Heating Using a Flexible Flapping Guide Winglet

Contact Info

Product

Resources

About