International Scientific Journal


This study aimed to investigate the thermal behavior of water flows in a solar collector equipped with zig-zag tubes. To achieve this, a numerical simulation using CFD was conducted, which is a powerful tool for analyzing fluid-flow and heat transfer. The simulation employed the finite volume method to discretize the fluid domain and the SIMPLE algorithm to solve the pressure-velocity coupling. The simulation results indicated that the shape of the tubes significantly influenced the flow behavior and overall performance of the solar collector. Specifically, the temperature profiles at various times of the day showed that zig-zag-shaped tubes enhanced the heat transfer coefficient, resulting in higher temperatures within the collector. Moreover, the zig-zag design increased the residence time of the fluid inside the collector, further improving its overall efficiency. These findings highlight the potential of utilizing zig-zag-shaped tubes to optimize the performance of solar water heating systems, which could have important implications for renewable energy applications.
PAPER REVISED: 2023-04-01
PAPER ACCEPTED: 2023-04-26
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2023, VOLUME 27, ISSUE Issue 4, PAGES [3143 - 3153]
  1. Li, J., et al., Technical And Economic Performance Study on Winter Heating System of Air Source Heat Pump Assisted Solar Evacuated Tube Water Heater, Applied Thermal Engineering, 221 (2023), Feb., 119851
  2. Tamuli, B. R., Nath, S. Analysis of Micro Heat Pipe Array Based Evacuated Tube Solar Water Heater Integrated with an Energy Storage System for Improved Thermal Performance. Thermal Science and Engineering Progress, 41 (2023), June, 101801
  3. Nazari, M., et al., Exergy and Thermoeconomic Analyses of Serpentine Tube Flat-Plate Solar Water Heaters Coated With CuO Nanostructures, Case Studies in Thermal Engineering, 35 (2022), July, 102072
  4. Siritan, et al., Thermal Performance and Thermo-Economics Analysis of Evacuated Glass Tube Solar Water Heater With Closed-Loop Pulsating Heat Pipe, Case Studies In Thermal Engineering, 35 (2022), July, 102139
  5. Tamuli, B. R., et al., Performance Enhancement of a Dual Heat Pipe Array Based Evacuated Tube Solar Water Heater for North Eastern India Climatic Condition: A Numerical Approach, Applied Thermal Engineering, 213 (2022), Aug., 118597
  6. Sivasubramanian, R., et al., Performance Analysis of Multipass Tubes Solar Water Heater Using Nanofluids, Materials Today: Proceedings, 66 (2022), 3, pp. 1051-1055
  7. Gudeta, M. S., et al., Performance Analysis of Solar Water Heater System With Heat Pipe Evacuated Tube Collector on Moha Soft Drink Industries in Ethiopia, Case Studies in Thermal Engineering, 36 (2022), Aug., 102211
  8. Arun, M., et al., Experimental and CFD Analysis of Plain And Dimples Tube at Application of Solar Water Heater, Materials Today: Proceedings, 42 (2021), 2, pp. 804-809
  9. Al-Joboory, H. N. S. Comparative Experimental Investigation of Two Evacuated Tube Solar Water Heaters of Different Configurations for Domestic Application of Baghdad-Iraq, Energy and Buildings, 203 (2019), Nov., 109437
  10. Shalaby, S. M., et al., Experimental Study of The Solar Water Heater Integrated With Shell and Finned Tube Latent Heat Storage System, Journal of Energy Storage, 31 (2020), Oct., 101628
  11. Deeyoko, L. A. J., et al., Exergy, Economics and Pumping Power Analyses of Flat Plate Solar Water Heater Using Thermal Performance Enhancer in Absorber Tube, Applied Thermal Engineering, 154 (2019), May, pp. 726-737
  12. Balaji, K., et al., Experimental Analysis on Free Convection Effect Using Two Different Thermal Performance Enhancers in Absorber Tube of a Forced Circulation Flat Plate Solar Water Heater, Solar Energy, 185 (2019), June, pp. 445-454
  13. Tang, R., Yang, Y., Nocturnal Reverse Flow in Water-In-Glass Evacuated Tube Solar Water Heaters, Energy Conversion and Management, 80 (2014), Apr., pp. 173-177
  14. Wannagosit, C., et al., Validated Mathematical Models of a Solar Water Heater System with Thermosyphon Evacuated Tube Collectors, Case studies In Thermal Engineering, 12 (2018), Sept., pp. 528-536
  15. Li, K., et al., Numerical Investigation of Flow And Heat Transfer Performance of Solar Water Heater With Elliptical Collector Tube, Energy Procedia, 70 (2015), Apr., pp. 285-292
  16. Arab, M., Abbas, A., Model-based Design and Analysis of Heat Pipe Working Fluid for Optimal Performance in A Concentric Evacuated Tube Solar Water Heater, Solar Energy, 94 (2013), Aug., pp. 162-176
  17. Menni, Y., et al., Effect of Wall-Mounted V-Baffle Position in A Turbulent Flow Through a Channel: Analysis of Best Configuration for Optimal Heat Transfer, International Journal of Numerical Methods for Heat & Fluid-flow, 29 (2018), 10, pp. 3908-3937
  18. Menni, Y., et al., Enhancement of the Turbulent Convective Heat Transfer in Channels Through The Baffling Technique and Oil/Multiwalled Carbon Nanotube Nanofluids, Numerical Heat Transfer, Part A: Applications, 79 (2020) 4, pp. 311-351
  19. Vural, E., et al., Analyzing the effects of hexane and water blended diesel fuels on emissions and performance in a ceramic-coated diesel engine by Taguchi optimization method, Fuel, 344 (2023), July, 128105
  20. Patel, A., et al., Comparative Thermal Performance Studies of Serpentine Tube Solar Water Heater With Straight Tube Solar Water Heater, IOSR Journal of Mechanical and Civil Engineering (IOSR-JMCE), 13 (2016), 4, pp. 79-83

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence