Hydrothermal performance of humid air flow in a rectangular solar air heater equipped with V‐shaped ribs

Kadijani, Omid Nouri; Moghadam, Hamid Kazemi; Ajarostaghi, Seyed Soheil Mousavi; Asadi, Asgar; Pour, Mohsen Saffari

doi:10.1002/ese3.1136

Cited by 9 publications

(1 citation statement)

References 46 publications

(64 reference statements)

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“…Today, fossil energies are widely used in various industries, but due to the lack of these energies and the environmental pollution caused by their use, societies have turned to using clean and renewable energies such as solar energy [1][2][3], wind energy [4], and geothermal energy [5][6][7]. The use of these energies requires comprehensive and complete information regarding the design and operation of renewable energy converters.…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Double Stack Blade Savonius Wind Turbine with Secondary Blades

Ajarostaghi

Mousavi

Bhojaraju³

2023

IOP Conf. Ser.: Earth Environ. Sci.

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In this work, the performance of the Savonius vertical axis wind turbine with secondary blades was investigated numerically. The impacts of two geometric parameters of the secondary blades, including the height of secondary blades (h) and the distance between the main and the secondary blades (b) on the output torque were analyzed. Numerical simulations were performed by a commercial CFD code, ANSYS FLUENT 18.2. Numerical results show that employing secondary blades has a constructive impact on the output torque compared to the case without secondary blades. Moreover, the studied geometric parameters of the secondary blades have a significant impoact on the performance of the proposed turbine. It can be seen that by increasing the height of secondary blades, the angular position of the maximum torque is shifted. At b = 2.5 mm, the difference between the models is more comparable. Models h = 6 and 12 mm have the highest output torque, although with a slight difference between them. Model h = 12 mm has the highest output torque. At b = 7.5 mm, the difference between the models is more comparable than b = 2.5 mm. Model h = 12 mm has the highest output torque and models h = 3 and 6 mm are in the next levels. Obtained results in the second section demonstrate that by growing the distance between the secondary and the main blades, in the case of h = 3 mm, the produced torque declines. Furthermore, by increasing the distance between the secondary and the main blades from b = 0 mm to b = 2.5 mm and b = 7.5 mm, the amount of torque produced decreases by 17.33 and 26.66%, respectively. Moreover, by augmenting the distance between the secondary and main blades from b = 2.5 mm to b = 7.5 mm (200% growth), the produced torque decreases by 11.3%.

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Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Double Stack Blade Savonius Wind Turbine with Secondary Blades

Ajarostaghi

Mousavi

Bhojaraju³

2023

IOP Conf. Ser.: Earth Environ. Sci.

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Numerical investigation on the performance of a solar air heater using inclined impinging jets on absorber plate with parallel and crossing orientation of nozzles

Hai

Mansir

Alshuraiaan

et al. 2023

Case Studies in Thermal Engineering

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Thermal performance augmentation in a pipe employing hybrid nanofluid and a plate as turbulator with V-shaped double-winglet ribs

Fan,

Wang,

Liu

et al. 2024

Sci Rep

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This article employs a plate with V-shape ribs inside a tube as turbulator to augment the heat transfer rate. The utilized vortex generators are double-winglets arranged in a V-shape placed on both sides of the plate. The proposed system’s suggested working fluids are water-based hybrid nanofluids, including Al2O3–Cu/water, Cu–CuO/water, and Cu–TiO2/water. This work involves a numerical evaluation of the effects of the type and volume concentration of the examined hybrid nanofluids on the enhancement of heat transfer. The experimental results are used to validate the numerical model. It is worth mentioning that all the obtained numerical results are compared with the simple tube, without any turbulator (vortex generator) and in the presence of water instead of the hybrid nanofluids. Based on the numerical results, it can be concluded that all employed hybrid nanofluids showed improved thermal performance compared to pure water. Furthermore, the differences between the models are more substantial for higher Reynolds numbers than for lower Reynolds numbers. In Re = 30,000, the Cu–TiO2/water exhibits the lowest thermal performance improvement (augmentation of about 0.3%), while the Cu–CuO/water at Re = 50,000 exhibits the largest thermal performance improvement (augmentation of approximately 5.7%), in the case of ∅1 = ∅2 = 0.5%. For ∅1 = ∅2 = 1%, the Cu–TiO2/water at Re = 30,000 has the lowest thermal performance improvement (augmentation of around 1.1%), while the Cu–CuO/water at Re = 50,000 has the most thermal performance improvement (augmentation of roughly 8.7%). According to the augmentation of around 2.8% at Re = 30,000 for Cu–TiO2/water and approximately 10.8% at Re = 50,000 for Cu–CuO/water, the thermal performance increase in the scenario of ∅1 = ∅2 = 1.5% is the lowest. In Conclusion, the Cu–CuO/water hybrid nanofluid with a volume concentration of ∅1 = ∅2 = 1.5% has the greatest thermal performance value of all the hybrid nanofluids studied.

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Hydrothermal performance of humid air flow in a rectangular solar air heater equipped with V‐shaped ribs

Cited by 9 publications

References 46 publications

Numerical Analysis of Double Stack Blade Savonius Wind Turbine with Secondary Blades

Numerical Analysis of Double Stack Blade Savonius Wind Turbine with Secondary Blades

Numerical investigation on the performance of a solar air heater using inclined impinging jets on absorber plate with parallel and crossing orientation of nozzles

Thermal performance augmentation in a pipe employing hybrid nanofluid and a plate as turbulator with V-shaped double-winglet ribs

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