The optimal performance of a solar thermal collector with S-shaped ribs is achieved at specific geometrical parameters: relative roughness pitch of 8, relative roughness height of 0.043, arc angle of 60°, and relative roughness width of 3.
Authors
Khushmeet Kumar, Department of Mechanical Engineering, Baddi University of Emerging Sciences and Technology, Baddi, 173205, India
Sushil Kumar, Department of Physics, Hansraj College, University of Delhi, New Delhi, 110007, India
Deoraj Prajapati, Punjab Engineering College, Deemed to be University, Chandigarh, 160012, India
Sushant Samir, Punjab Engineering College (Deemed to be University), Chandigarh, 160012, India
Sashank Thapa, Faculty of Engineering and Technology, Shoolini University, Solan, 173229, India
Raj Kumar, Jindal School of Environment & Sustainability, O.P Jindal Global University, Sonipat, 131001, India; Department of Mechanical Engineering, Gachon University, 1342 Seongnamdaero, Sujeong-gu, Seongnam, 13120, South Korea
Summary
The current examination used a multi-criteria decision-making (MCDM) approach to optimize the roughness parameters of S-shaped ribs (SSRs) in a solar thermal collector (STC) duct using air as the working fluid. Different SSRs were tested to identify the combination of parameters resulting in the best performance. Geometrical parameters such as relative roughness pitch ((Formula presented.)) varied from 4 to 12, relative roughness height ((Formula presented.)) from 0.022 to 0.054, arc angle ((Formula presented.)) from 30° to 75°, and relative roughness width ((Formula presented.)) from 1 to 4. The Nusselt number ((Formula presented.)) and friction factor ((Formula presented.)), findings which impact the STC performance, rely on SSRs.
The performance measurements show that no combination of SSR parameters lead to the best enhancement heat transfer rate at low enhancement in the friction. So, a hybrid multi-criteria decision-making strategy using the Analytical Hierarchy Process (AHP) for criterion significance and Multi Attributive Border Approximation Area Comparison (MABAC) for alternative ranking was used to determine which combination of geometrical parameters will result in the optimum performance of a roughened STC. This work employs a hybrid MCDM technique to optimise the effectiveness of an STC roughened with SSRs. To optimize the SSR design parameters, this study used the hybrid AHP-MABAC technique for analytical assessment of a roughened STC. The optimization results showed that the STC roughened with SSRs achieved the optimum performance at (Formula presented.) = 8, (Formula presented.) = 0.043, (Formula presented.) = 60° and (Formula presented.) = 3.
Published in: Fluids
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