ArticleScientific reports2026
Entropy-based multi-criteria decision optimization of dimpled solar air heater duct using WASPAS and MAIRCA models.
Article in Scientific reports, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
The purpose of the current examination is to optimize the geometric parameters of dimple-shaped roughened solar air heater (DSRSAH), for which a hybrid multi-criteria decision-making (MCDM) approach has been developed. It balances the advantages of improved heat transfer (HT) with the drawbacks of higher frictional losses from artificial roughness on the absorber plate. To evaluate the performance of 27 experimental configurations of DSRSAH, the entropy-weighted WASPAS and MAIRCA models are utilised. Pitch ratio ([Formula: see text]) varied from 10 to 20, relative roughness height ([Formula: see text]) from 0.021 to 0.036 and arc angle (α) from 45º-75º during analyses. For providing a comprehensive performance assessment, the evaluation criteria include the Nusselt number ([Formula: see text]), friction factor ([Formula: see text]), and thermohydraulic performance parameter ([Formula: see text]). In order to compare improvements in HT and pressure drop to a smooth duct, ratio [Formula: see text] and [Formula: see text] are used. Entropy approach is a strategy that enables the objective of assigning weights based on the dispersion of data. The configuration with highest effectiveness is [Formula: see text], [Formula: see text], and α = 60°. Furthermore, the reliability and robustness of the selected design is confirmed by sensitivity analysis.
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