Experimental study of thermal performance improvement of a solar air flat plate collector through the use of obstacles: application for the drying of ‘yellow onion’

Experimental investigation of thermal performance of a solar air heater with perforated obstacles on an absorber plate

“…The results obtained in this study demonstrate significant improvements in the thermal and effective efficiency of solar air heaters via the use of perforated obstacles, which are in line with or exceed the findings of previous research. For instance, Saravanakumar et al (2019) and Ahmed-Zaid et al (1999) reported thermal efficiency improvements of about 28.3% and 30%, respectively, when using ribbed or arch-shaped obstacles. In comparison, our design with perforated obstacles achieved efficiency increases of 36% at higher flow rates, supported by better heat transfer due to enhanced turbulence.…”

“…Ahmed-Zaid et al (1999), Abene et al (2004), and Sahu et al (2021, 2022) utilized various obstacles within a solar collector to raise the air outlet temperature and prolong the drying time for agricultural products (yellow onions and grapes). Reduced compared to when using an unobstructed collector.…”

“…This study investigates how perforated obstacles strategically placed on the absorber plate improve convective heat transfer through enhanced turbulence, resulting in significant thermal efficiency gains. Ahmed-Zaid et al (1999), Abene et al (2004), and Sahu et al (2021Sahu et al ( , 2022 utilized various obstacles within a solar collector to raise the air outlet temperature and prolong the drying time for agricultural products (yellow onions and grapes). Reduced compared to when using an unobstructed collector.…”

Experimental investigation of thermal performance of a solar air heater with perforated obstacles on an absorber plate

“…The results obtained in this study demonstrate significant improvements in the thermal and effective efficiency of solar air heaters via the use of perforated obstacles, which are in line with or exceed the findings of previous research. For instance, Saravanakumar et al (2019) and Ahmed-Zaid et al (1999) reported thermal efficiency improvements of about 28.3% and 30%, respectively, when using ribbed or arch-shaped obstacles. In comparison, our design with perforated obstacles achieved efficiency increases of 36% at higher flow rates, supported by better heat transfer due to enhanced turbulence.…”

“…Ahmed-Zaid et al (1999), Abene et al (2004), and Sahu et al (2021, 2022) utilized various obstacles within a solar collector to raise the air outlet temperature and prolong the drying time for agricultural products (yellow onions and grapes). Reduced compared to when using an unobstructed collector.…”

“…This study investigates how perforated obstacles strategically placed on the absorber plate improve convective heat transfer through enhanced turbulence, resulting in significant thermal efficiency gains. Ahmed-Zaid et al (1999), Abene et al (2004), and Sahu et al (2021Sahu et al ( , 2022 utilized various obstacles within a solar collector to raise the air outlet temperature and prolong the drying time for agricultural products (yellow onions and grapes). Reduced compared to when using an unobstructed collector.…”

CFD Numerical Investigation of a New Solar Flat Air-Collector Having Different Obstacles with Various Configurations and Arrangements

“…In this context, and according to numerous research studies, the integration of obstacles in the air passage channel presents an effective method for improving the convective heat transfer process by creating turbulence, thereby minimizing dead zones. Indeed, the use of fin types, OT, OIF1, WT, WDL1, and WOL1 [1], and the integrating plus shaped baffles [2] or the planting of triangular, circular, and hexagonal obstructions [3], prove the creation of a turbulent flow, a good distribution of the fluid resulting in the reduction of dead zones.…”

Experimental study of drying of green chili by solar air flat plate collector used obstacles

“…Solar air flat plate collectors used of obstacles for application for the drying of grape are studied by Abene, A. et al [11]. Ahmed-Zaid, A. et al [12] have optimized the performance of the drying unit of the agricultural products by using of the obstacles in the collector duct. Karsli, S. [13] analysis a performance of four types of air heating flat plate solar collectors: a finned collector with an angle of 75°, a finned collector with an angle of 70°, a collector with tubes, and a base collector for drying applications.…”

Experimental investigation of thermal performance of a solar air heater with perforated obstacles on an absorber plate

“…The results obtained in this study demonstrate significant improvements in the thermal and effective efficiency of solar air heaters via the use of perforated obstacles, which are in line with or exceed the findings of previous research. For instance, Saravanakumar et al (2019) and Ahmed-Zaid et al (1999) reported thermal efficiency improvements of about 28.3% and 30%, respectively, when using ribbed or arch-shaped obstacles. In comparison, our design with perforated obstacles achieved efficiency increases of 36% at higher flow rates, supported by better heat transfer due to enhanced turbulence.…”

“…Ahmed-Zaid et al (1999), Abene et al (2004), and Sahu et al (2021, 2022) utilized various obstacles within a solar collector to raise the air outlet temperature and prolong the drying time for agricultural products (yellow onions and grapes). Reduced compared to when using an unobstructed collector.…”

“…This study investigates how perforated obstacles strategically placed on the absorber plate improve convective heat transfer through enhanced turbulence, resulting in significant thermal efficiency gains. Ahmed-Zaid et al (1999), Abene et al (2004), and Sahu et al (2021Sahu et al ( , 2022 utilized various obstacles within a solar collector to raise the air outlet temperature and prolong the drying time for agricultural products (yellow onions and grapes). Reduced compared to when using an unobstructed collector.…”

CFD Numerical Investigation of a New Solar Flat Air-Collector Having Different Obstacles with Various Configurations and Arrangements

“…In this context, and according to numerous research studies, the integration of obstacles in the air passage channel presents an effective method for improving the convective heat transfer process by creating turbulence, thereby minimizing dead zones. Indeed, the use of fin types, OT, OIF1, WT, WDL1, and WOL1 [1], and the integrating plus shaped baffles [2] or the planting of triangular, circular, and hexagonal obstructions [3], prove the creation of a turbulent flow, a good distribution of the fluid resulting in the reduction of dead zones.…”

Experimental study of drying of green chili by solar air flat plate collector used obstacles

“…Solar air flat plate collectors used of obstacles for application for the drying of grape are studied by Abene, A. et al [11]. Ahmed-Zaid, A. et al [12] have optimized the performance of the drying unit of the agricultural products by using of the obstacles in the collector duct. Karsli, S. [13] analysis a performance of four types of air heating flat plate solar collectors: a finned collector with an angle of 75°, a finned collector with an angle of 70°, a collector with tubes, and a base collector for drying applications.…”

Experimental investigation of thermal performance of a solar air heater with perforated obstacles on an absorber plate

“…The results obtained in this study demonstrate significant improvements in the thermal and effective efficiency of solar air heaters via the use of perforated obstacles, which are in line with or exceed the findings of previous research. For instance, Saravanakumar et al (2019) and Ahmed-Zaid et al (1999) reported thermal efficiency improvements of about 28.3% and 30%, respectively, when using ribbed or arch-shaped obstacles. In comparison, our design with perforated obstacles achieved efficiency increases of 36% at higher flow rates, supported by better heat transfer due to enhanced turbulence.…”

“…Ahmed-Zaid et al (1999), Abene et al (2004), and Sahu et al (2021, 2022) utilized various obstacles within a solar collector to raise the air outlet temperature and prolong the drying time for agricultural products (yellow onions and grapes). Reduced compared to when using an unobstructed collector.…”

“…This study investigates how perforated obstacles strategically placed on the absorber plate improve convective heat transfer through enhanced turbulence, resulting in significant thermal efficiency gains. Ahmed-Zaid et al (1999), Abene et al (2004), and Sahu et al (2021Sahu et al ( , 2022 utilized various obstacles within a solar collector to raise the air outlet temperature and prolong the drying time for agricultural products (yellow onions and grapes). Reduced compared to when using an unobstructed collector.…”

CFD Numerical Investigation of a New Solar Flat Air-Collector Having Different Obstacles with Various Configurations and Arrangements

“…In this context, and according to numerous research studies, the integration of obstacles in the air passage channel presents an effective method for improving the convective heat transfer process by creating turbulence, thereby minimizing dead zones. Indeed, the use of fin types, OT, OIF1, WT, WDL1, and WOL1 [1], and the integrating plus shaped baffles [2] or the planting of triangular, circular, and hexagonal obstructions [3], prove the creation of a turbulent flow, a good distribution of the fluid resulting in the reduction of dead zones.…”

Experimental study of drying of green chili by solar air flat plate collector used obstacles

“…Solar air flat plate collectors used of obstacles for application for the drying of grape are studied by Abene, A. et al [11]. Ahmed-Zaid, A. et al [12] have optimized the performance of the drying unit of the agricultural products by using of the obstacles in the collector duct. Karsli, S. [13] analysis a performance of four types of air heating flat plate solar collectors: a finned collector with an angle of 75°, a finned collector with an angle of 70°, a collector with tubes, and a base collector for drying applications.…”