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Performance Enhancement of a Solar Air Heater Equipped with a Tree-like Fractal Cylindrical Pin for Drying Applications: Tests Under Real Climatic Conditions

Author

Listed:
  • Chotiwut Prasopsuk

    (Thermal and Fluid Laboratory (TFL), Department of Teacher Training in Mechanical Engineering, King Mongkut’s University of Technology North Bangkok, 1518 Phacharat 1 Rd., Bang Sue, Bangkok 10800, Thailand)

  • Kittiwoot Sutthivirode

    (Thermal and Fluid Laboratory (TFL), Department of Teacher Training in Mechanical Engineering, King Mongkut’s University of Technology North Bangkok, 1518 Phacharat 1 Rd., Bang Sue, Bangkok 10800, Thailand)

  • Tongchana Thongtip

    (Thermal and Fluid Laboratory (TFL), Department of Teacher Training in Mechanical Engineering, King Mongkut’s University of Technology North Bangkok, 1518 Phacharat 1 Rd., Bang Sue, Bangkok 10800, Thailand)

Abstract

This paper reports the improved thermal and drying performance of a solar air heater powered by real solar irradiance and equipped with a tree-like fractal-based cylindrical pin (SAH-TFCP) as a turbulator for drying applications. The main purpose of this work is to demonstrate the SAH-TFCP’s improvement potential based on its thermal and drying performance as compared with a conventional solar air heater based on a flat-plate absorber (SAH-FP). The test was implemented based on solar time from 8:30 to 17:30 under Thailand’s climatic conditions at a latitude angle of 14° and a longitude angle of 100°. Turmeric slices were used to evaluate the SAH’s drying performance. The thermal efficiency, moisture content wet basis (MC wb ), drying rate (DR), and drying efficiency were measured as parameters of interest to assess the improvement potential of the SAH-TFCP over the SAH-FP. The results indicate that the SAH-TFCP provides better thermal and drying performance than the SAH-FP. A higher flow rate yields a higher thermal efficiency and a greater improvement potential. The improvement potential is around 44–85%. The drying efficiency of the SAH-TFCP is always higher than that of the SAH-FP and has an improvement potential of 32–44%, depending on the airflow rate.

Suggested Citation

  • Chotiwut Prasopsuk & Kittiwoot Sutthivirode & Tongchana Thongtip, 2025. "Performance Enhancement of a Solar Air Heater Equipped with a Tree-like Fractal Cylindrical Pin for Drying Applications: Tests Under Real Climatic Conditions," Energies, MDPI, vol. 18(9), pages 1-25, April.
    • Handle: RePEc:gam:jeners:v:18:y:2025:i:9:p:2230-:d:1644248
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    1. Camilo Ramirez & Mario Palacio & Mauricio Carmona, 2020. "Reduced Model and Comparative Analysis of the Thermal Performance of Indirect Solar Dryer with and without PCM," Energies, MDPI, vol. 13(20), pages 1-18, October.
    2. Dong, Zhimin & Liu, Peng & Xiao, Hui & Liu, Zhichun & Liu, Wei, 2021. "A study on heat transfer enhancement for solar air heaters with ripple surface," Renewable Energy, Elsevier, vol. 172(C), pages 477-487.
    3. Junichiro Matsunaga & Koki Kikuta & Hideki Hirakawa & Keita Mizuno & Masaki Tajima & Motoya Hayashi & Akira Fukushima, 2021. "An Assessment of Heating Load Reduction by a Solar Air Heater in a Residential Passive Ventilation System," Energies, MDPI, vol. 14(22), pages 1-12, November.
    4. Tabish Alam & Chandan Swaroop Meena & Nagesh Babu Balam & Ashok Kumar & Raffaello Cozzolino, 2021. "Thermo-Hydraulic Performance Characteristics and Optimization of Protrusion Rib Roughness in Solar Air Heater," Energies, MDPI, vol. 14(11), pages 1-19, May.
    5. Varun Pratap Singh & Siddharth Jain & Ashish Karn & Ashwani Kumar & Gaurav Dwivedi & Chandan Swaroop Meena & Nitesh Dutt & Aritra Ghosh, 2022. "Recent Developments and Advancements in Solar Air Heaters: A Detailed Review," Sustainability, MDPI, vol. 14(19), pages 1-55, September.
    6. Wengang Hao & Shuonan Liu & Baoqi Mi & Yanhua Lai, 2020. "Mathematical Modeling and Performance Analysis of a New Hybrid Solar Dryer of Lemon Slices for Controlling Drying Temperature," Energies, MDPI, vol. 13(2), pages 1-23, January.
    7. Abubakar, S. & Umaru, S. & Kaisan, M.U. & Umar, U.A. & Ashok, B. & Nanthagopal, K., 2018. "Development and performance comparison of mixed-mode solar crop dryers with and without thermal storage," Renewable Energy, Elsevier, vol. 128(PA), pages 285-298.
    8. Zhang, Chengbin & Li, Jie & Chen, Yongping, 2020. "Improving the energy discharging performance of a latent heat storage (LHS) unit using fractal-tree-shaped fins," Applied Energy, Elsevier, vol. 259(C).
    9. Hamed Karami & Mohammad Kaveh & Iman Golpour & Esmail Khalife & Robert Rusinek & Bohdan Dobrzański & Marek Gancarz, 2021. "Thermodynamic Evaluation of the Forced Convective Hybrid-Solar Dryer during Drying Process of Rosemary ( Rosmarinus officinalis L.) Leaves," Energies, MDPI, vol. 14(18), pages 1-17, September.
    10. Zuhair Qamar & Anjum Munir & Timothy Langrish & Abdul Ghafoor & Muhammad Tahir, 2023. "Experimental and Numerical Simulations of a Solar Air Heater for Maximal Value Addition to Agricultural Products," Agriculture, MDPI, vol. 13(2), pages 1-17, February.
    11. Saxena, Abhishek & Varun, & El-Sebaii, A.A., 2015. "A thermodynamic review of solar air heaters," Renewable and Sustainable Energy Reviews, Elsevier, vol. 43(C), pages 863-890.
    12. Hassan, Hamdy & Abo-Elfadl, Saleh & El-Dosoky, M.F., 2020. "An experimental investigation of the performance of new design of solar air heater (tubular)," Renewable Energy, Elsevier, vol. 151(C), pages 1055-1066.
    13. Krzysztof Sornek & Karolina Papis-Frączek, 2022. "Development and Tests of the Solar Air Heater with Thermal Energy Storage," Energies, MDPI, vol. 15(18), pages 1-20, September.
    14. Anil Singh Yadav & Tabish Alam & Gaurav Gupta & Rajiv Saxena & Naveen Kumar Gupta & K. Viswanath Allamraju & Rahul Kumar & Neeraj Sharma & Abhishek Sharma & Utkarsh Pandey & Yogesh Agrawal, 2022. "A Numerical Investigation of an Artificially Roughened Solar Air Heater," Energies, MDPI, vol. 15(21), pages 1-27, October.
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