Inducing swirl flow inside the pipes of flat-plate solar collector by using multiple nozzles for enhancing thermal performance
Cao Y. Ayed H. Hashemian M. Issakhov A. Jarad F. Wae-hayee M.
December 2021Elsevier Ltd
Renewable Energy
2021#1801344 - 1357 pp.
In this numerical study, an attempt has been made to improve the thermal performance of the flat-plate solar collector (FPSC) by inducing the swirl flow inside the tube by the considered nozzles. To this end, the effect of the number of circumferential nozzles and their inclination angles was taken into the account. The considered number of nozzles was single, dual, triple, and quad. For each of the said cases, the inclination angle of nozzles was taken 30°, 45°, 60°, and 90° (A30, A45, A60, A90). Moreover, the mass flow rate of single-nozzle pipe was considered 0.2 kg/s, 1 kg/s, and 2 kg/s. To analyze all of the cases under identical conditions, the said mass flow rates were distributed equally among all of the nozzles (for dual, triple, and quad). All of the characteristics were defined in a form of A…-D…-N…-M… where A…, D…, N…, and “M…” stand for angle of injection, diameter of pipe, nozzle cross-section edge, and mass flow rate, respectively. Numerical simulation (3-dimensional) of the system was performed by Finite Volume Method (FVM). The turbulence nature of flow was simulated by the k-omega SST (shear stress transport) turbulent model. Results showed that the single-nozzle swirl generator had the highest thermal performance factor (TPF) so that for all cases its values were greater than unit. Mass flow rate growth increases Nu, heat extraction rate, and kinetic energy rate (KER) while drops friction factor and outlet temperature. Increment of injection angle increases outlet temperature and friction factor and reduces KER. The maximum and minimum values of TPF are 4.19 and 0.44 which belong to “single; A30-D50-N12.5-M0.2” and quad; A90-D50-N12.5-M0.5, respectively.
Finite Volume method (FVM) , Flat plate solar collector , Nozzle , Thermal performance
Text of the article Перейти на текст статьи
School of Mechatronic Engineering, Xian Technological University, Xian, 710021, China
Department of Civil Engineering, College of Engineering, King Khalid University, Abha, 61421, Saudi Arabia
Department of Mechanical Engineering, Faculty of Engineering, Urmia University, Urmia, Iran
Department of Mathematical and Computer Modelling, al-Farabi Kazakh National University, Almaty, 050040, Kazakhstan
Department of Mathematics, Cankaya University, Etimesgut, Ankara, 06790, Turkey
Department of Medical Research, China Medical University, Taichung, 40402, Taiwan
Department of Mechanical and Mechatronics Engineering, Faculty of Engineering, Prince of Songkla University, Hatyai, Songkhla, 90110, Thailand
School of Mechatronic Engineering
Department of Civil Engineering
Department of Mechanical Engineering
Department of Mathematical and Computer Modelling
Department of Mathematics
Department of Medical Research
Department of Mechanical and Mechatronics Engineering
10 лет помогаем публиковать статьи Международный издатель
Книга Публикация научной статьи Волощук 2026 Book Publication of a scientific article 2026