Numerical investigation of heat transfer enhancement by using louvered-winglet vortex generators mounted in a solar air heater channel-type

Duarte, Rafael M. D.; Salviano, Leandro O.; Ferreira, Wallace G.; Dezan, Daniel J.

doi:10.1007/s10973-023-12599-y

J Therm Anal Calorim

2023

DOI: 10.1007/s10973-023-12599-y

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Numerical investigation of heat transfer enhancement by using louvered-winglet vortex generators mounted in a solar air heater channel-type

Rafael M. D. Duarte,

Leandro O. Salviano,

Wallace G. Ferreira

et al.

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2024

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Cited by 3 publications

References 85 publications

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Analysis of exergy in a dimple-roughened solar thermal collector using MATLAB simulation

Kumar,

Sethi,

Thakur

et al. 2024

J Therm Anal Calorim

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In the current study, the performance of a dimple-roughened solar thermal collector (DRSTC) is investigated within a ($${\text{Re}}_{\text{xx}}$$ Re xx ) range that spans from 3000 to 48,000. Under constant solar intensity ($${I}_{\text{sr}}$$ I sr =1000 $${\text{Wm}}^{-2}$$ Wm - 2 ), relative roughness height ($${e}_{\text{d}}/{D}_{\text{h}}$$ e d / D h ) varied from 0.021 to 0.036, relative roughness pitch ($$p/{e}_{\text{d}}$$ p / e d ) from 10 to 20, arc angle ($${\alpha }_{\text{a}}$$ α a ) from 45 to 60°, and temperature rise parameter from 0.003 to 0.02, and the proposed model predicts exergy efficiency of the SAH, and the results obtained can be used as reference for the design of new solar thermal systems. The assessment makes use of advanced MATLAB simulations in order to evaluate the exergetic efficiency $${(}\eta_{{{\text{ex}}}} )$$ ( η ex ) of a DRSTC. At lower $${\text{Re}}_{\text{xx}}$$ Re xx values, $${(}\eta_{{{\text{ex}}}} )$$ ( η ex ) increases uniformly; however, stabilization and decline occur at higher $${\text{Re}}_{\text{xx}}$$ Re xx values. The highest $${(}\eta_{{{\text{ex}}}} )$$ ( η ex ) for the DRSTC is 1.47% under a temperature rise parameter $$(\Delta T/I_{{{\text{sr}}}} )$$ ( Δ T / I sr ) of 0.0071 $${\text{Km}}^{2}{\text{W}}^{-1}$$ Km 2 W - 1 for obtaining optimum values of $${e}_{\text{d}}/{D}_{\text{h}}$$ e d / D h = 0.036, $$p/{e}_{\text{d}}$$ p / e d = 10, and $$\alpha_{a}$$ α a = 60°. This research illustrates the usefulness of MATLAB for solar energy system analysis and optimization by integrating simulation and experimental data. This investigation further supports the feasibility of the proposed collector design.

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Analysis of exergy in a dimple-roughened solar thermal collector using MATLAB simulation

Kumar,

Sethi,

Thakur

et al. 2024

J Therm Anal Calorim

View full text Add to dashboard Cite

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Thermal effectiveness analysis of heat exchange tube with staggered louver-punched V-baffles

Promvonge,

Jayranaiwachira,

Promthaisong

et al. 2024

International Communications in Heat and Mass Transfer

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Heat transfer and fluid flow analysis in circular tubes with multi-delta-winglets vortex generators

Feng,

Teh,

et al. 2024

International Communications in Heat and Mass Transfer

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Numerical investigation of heat transfer enhancement by using louvered-winglet vortex generators mounted in a solar air heater channel-type

Cited by 3 publications

References 85 publications

Analysis of exergy in a dimple-roughened solar thermal collector using MATLAB simulation

Analysis of exergy in a dimple-roughened solar thermal collector using MATLAB simulation

Thermal effectiveness analysis of heat exchange tube with staggered louver-punched V-baffles

Heat transfer and fluid flow analysis in circular tubes with multi-delta-winglets vortex generators

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