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Screening analyses and thermal-hydraulic performance optimization of flat-plate solar air heaters with longitudinal vortex generators

Grant number: 17/06978-3
Support type:Regular Research Grants
Duration: August 01, 2017 - January 31, 2020
Field of knowledge:Engineering - Mechanical Engineering - Thermal Engineering
Principal researcher:Daniel Jonas Dezan
Grantee:Daniel Jonas Dezan
Home Institution: Centro de Engenharia, Modelagem e Ciências Sociais Aplicadas (CECS). Universidade Federal do ABC (UFABC). Ministério da Educação (Brasil). Santo André , SP, Brazil
Assoc. researchers: André Damiani Rocha ; Wallace Gusmão Ferreira


The thermal-hydraulic performance of solar collectors depends on the ability of the working fluid to remove the heat stored on those devices. Basically, the benefits of heat transfer enhancement by using special surface geometries are due to an increase of the convective heat transfer coefficient or/and surface area. The use of modified surfaces reduces the thermal resistance and thus provides an increase of the convective heat transfer coefficient. However, the heat transfer enhancement is always associated with pressure drop increasing. This research deals with the numerical investigation of the thermal-hydraulic performance of flat-plate solar air heaters with two kinds of longitudinal vortices generators (LVGs): delta and rectangular winglets vortex generators. The LVGs enhance the heat transfer through secondary vortices generation with low pressure losses. It is well known that there are a lot of parameters which can affect the thermal-hydraulic performance of LVGs. Thus,it is evident that the amount of the design of experiments to maximize the thermal-hydraulic performance of this type of surface can be enormous. Based on this,it used a non-parametric method for screening the input parameters (via Smoothing Spline ANOVA method)to evaluate the contribution of the input variables and their interactions on the thermal-hydraulic performance. A surrogate-based optimization process has been proposed in order to maximize the thermal-hydraulic performance through the selection of the most important LVG geometrical parameters. (AU)

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Scientific publications (4)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
DAMIANI ROCHA, ANDRE; SOLANO, GUILHERME ALONSO; DEZAN, DANIEL JONAS; MONTE VERDE, WILLIAM; BIAZUSSI, JORGE LUIZ; BANNWART, ANTONIO CARLOS. A numerical investigation on a capsule-intake of the electrical submersible pump in skid. OIL & GAS SCIENCE AND TECHNOLOGY-REVUE DE L INSTITUT FRANCAIS DU PETROLE, v. 76, APR 1 2021. Web of Science Citations: 0.
DEZAN, DANIEL J.; ROCHA, ANDRE D.; SALVIANO, LEANDRO O.; FERREIRA, WALLACE G. Thermo-hydraulic optimization of a solar air heater duct with non-periodic rows of rectangular winglet pairs. Solar Energy, v. 207, p. 1172-1190, SEP 1 2020. Web of Science Citations: 0.
DEZAN, DANIEL J.; ROCHA, ANDRE D.; FERREIRA, WALLACE G. Parametric sensitivity analysis and optimisation of a solar air heater with multiple rows of longitudinal vortex generators. APPLIED ENERGY, v. 263, APR 1 2020. Web of Science Citations: 0.
DEZAN, DANIEL JONAS; YANAGIHARA, JURANDIR ITIZO; JENOVENCIO, GUILHERME; SALVIANO, LEANDRO OLIVEIRA. Parametric investigation of heat transfer enhancement and pressure loss in louvered fins with longitudinal vortex generators. INTERNATIONAL JOURNAL OF THERMAL SCIENCES, v. 135, p. 533-545, JAN 2019. Web of Science Citations: 2.

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