Longitudinal vortex generators applied to enhancement of heat transfer on flat-plate solar collector

• Grant number: 17/00608-0
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: April 01, 2017
• End date: June 30, 2019
• Field of knowledge: Engineering - Mechanical Engineering - Thermal Engineering
• Principal Investigator: Leandro Oliveira Salviano
• Grantee: Felipe Augusto Santos da Silva
• Host Institution: Universidade Estadual Paulista (UNESP). Campus de Rosana. Rosana , SP, Brazil
• Associated scholarship(s): 18/20875-5 - Longitudinal vortex generators applied on enhancement heat transfer for a flat plate solar collector, BE.EP.IC

Abstract

Heating water for domestic and industrial environments is an activity that requires a higher amount of thermal energy, supplied either from burning gas/biomass or direct use of electricity. Nowadays, these conventional methods have greater resistance to their growth in response to inexorable increase of society demand. Therefore, the solar energy has emerged as a suitable renewable energy source for this application type, requiring permanent technology development on solar collector regarding its thermal efficiency in order to meet the application requirements. Overall, the main goal of this research project is provide the numerical simulation of heat transfer enhancement of single-phase water flow inside tubes on flat-plate solar collector, by longitudinal vortex generators (type delta-winglet and rectangular-winglet), at Reynolds number of 300, 600 and 900. Currently, twisted taped device is a widely passive technique applied to enhancement the heat transfer inside the circular tubes used in flat-plate solar collector. Although this passive technique provides significant increase of heat transfer its high pressure drop penalty is a concern for pump system. On the other hands, longitudinal vortex generator applied on flat-plate solar collector is a promising alternative since its main characteristics is to provide significant increase of heat transfer on downstream with low pressure drop penalty. (AU)

Scientific publications

(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)

DA SILVA, FELIPE A. S.; DEZAN, DANIEL J.; PANTALEAO, ALUISIO V.; SALVIANO, LEANDRO O.. Longitudinal vortex generator applied to heat transfer enhancement of a flat plate solar water heater. APPLIED THERMAL ENGINEERING, v. 158, JUL 25 2019. (16/14620-9, 17/00608-0)

SILVA, FELIPE A. S.; JUNIOR, LUIS; SILVA, JOSE; KAMBAMPATI, SANDILYA; SALVIANO, LEANDRO. Parametric optimization of a stamped longitudinal vortex generator inside a circular tube of a solar water heater at low Reynolds numbers. SN APPLIED SCIENCES, v. 3, n. 8, AUG 2021. (17/00608-0, 16/14620-9)