IDEAS home Printed from https://ideas.repec.org/a/eee/energy/v297y2024ics0360544224011034.html
   My bibliography  Save this article

Improved model for thermal transmission in evacuated tubes: Effect of non-uniform heat flux and circumferential conduction

Author

Listed:
  • Fan, Leilei
  • Sun, Zhilin
  • Wan, Wuyi
  • Zhang, Boran

Abstract

Evacuated tubes are extensively utilized for converting solar energy into thermal energy owing to their exceptional thermal properties and affordability. The circumferential temperature gradient of the evacuated tube is significant to the heat and mass transfer inside, but it is often neglected. This research proposed an improved model incorporating non-uniform heat flux and circumferential conduction to obtain the temperature distribution. In the experiment, A thermal insulation material was inserted inside the inner tube to create an adiabatic boundary. Various conditions (non-uniform, rectangular, and uniform heat fluxes, circumferential conduction of the coating) were numerically compared. The enhanced combined thermal transmission model was validated, demonstrating a relative error of 6.45 % in temperature increase calculation and increasing the prediction accuracy by 42.15 % at least. The distribution of the heat flux and the thermal conduction of the coating were identified as the primary factors affecting the heat transfer properties of the evacuated tube. An imbalanced distribution of heat flux resulted in non-uniform heat transfer, whereas the circumferential conduction within the coating effectively modulated the temperature distribution to achieve uniformity. The local heat transfer coefficient exhibited non-uniformity, with calculated values ranging from 0.23 to 3.25 W/(m2∙K), and an error range of −16 to +3 %.

Suggested Citation

  • Fan, Leilei & Sun, Zhilin & Wan, Wuyi & Zhang, Boran, 2024. "Improved model for thermal transmission in evacuated tubes: Effect of non-uniform heat flux and circumferential conduction," Energy, Elsevier, vol. 297(C).
  • Handle: RePEc:eee:energy:v:297:y:2024:i:c:s0360544224011034
    DOI: 10.1016/j.energy.2024.131330
    as

    Download full text from publisher

    File URL: http://www.sciencedirect.com/science/article/pii/S0360544224011034
    Download Restriction: Full text for ScienceDirect subscribers only

    File URL: https://libkey.io/10.1016/j.energy.2024.131330?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    As the access to this document is restricted, you may want to search for a different version of it.

    References listed on IDEAS

    as
    1. Sun, Chengpeng & Wu, Haifeng & Wang, Ruixiang & Xing, Meibo & Tang, Wentao, 2022. "An improvement approach for the solar collector by optimizing the interface of assembling structure," Renewable Energy, Elsevier, vol. 195(C), pages 688-700.
    2. Korres, Dimitrios N. & Tzivanidis, Christos & Koronaki, Irene P. & Nitsas, Michael T., 2019. "Experimental, numerical and analytical investigation of a U-type evacuated tube collectors' array," Renewable Energy, Elsevier, vol. 135(C), pages 218-231.
    3. Gambade, Julien & Noël, Hervé & Glouannec, Patrick & Magueresse, Anthony, 2023. "Numerical model of intermittent solar hot water production," Renewable Energy, Elsevier, vol. 218(C).
    4. Singla, Mohit & Hans, Vishavjeet Singh & Singh, Sukhmeet, 2022. "CFD analysis of rib roughened solar evacuated tube collector for air heating," Renewable Energy, Elsevier, vol. 183(C), pages 78-89.
    5. Du, Bin & Lund, Peter D. & Wang, Jun, 2021. "Combining CFD and artificial neural network techniques to predict the thermal performance of all-glass straight evacuated tube solar collector," Energy, Elsevier, vol. 220(C).
    6. Essa, Mohamed A. & Asal, Manar & Saleh, Mohamed A. & Shaltout, R.E., 2021. "A comparative study of the performance of a novel helical direct flow U-Tube evacuated tube collector," Renewable Energy, Elsevier, vol. 163(C), pages 2068-2080.
    7. Pal, Ram Kumar & Kumar, K. Ravi, 2022. "Effect of transient concentrated solar flux profile on the absorber surface for direct steam generation in the parabolic trough solar collector," Renewable Energy, Elsevier, vol. 186(C), pages 226-249.
    8. Kumar, Rakesh & Kaushik, S.C. & Garg, H.P., 1994. "Transient analysis of evacuated tubular solar collector with finite difference technique," Renewable Energy, Elsevier, vol. 4(8), pages 941-947.
    Full references (including those not matched with items on IDEAS)

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.
    1. Yıldırım, Erdal & Yurddaş, Ali, 2021. "Assessments of thermal performance of hybrid and mono nanofluid U-tube solar collector system," Renewable Energy, Elsevier, vol. 171(C), pages 1079-1096.
    2. Tuncer, Azim Doğuş & Khanlari, Ataollah, 2023. "Improving the performance of a triple-flow solar air collector using recyclable aluminum cans as extended heat transfer surfaces: An energetic, exergetic, economic and environmental survey," Energy, Elsevier, vol. 282(C).
    3. Ni, Song & Pan, Chin & Hibiki, Takashi & Zhao, Jiyun, 2024. "Applications of nucleate boiling in renewable energy and thermal management and recent advances in modeling——a review," Energy, Elsevier, vol. 289(C).
    4. Li, Shoutu & Chen, Qin & Li, Ye & Pröbsting, Stefan & Yang, Congxin & Zheng, Xiaobo & Yang, Yannian & Zhu, Weijun & Shen, Wenzhong & Wu, Faming & Li, Deshun & Wang, Tongguang & Ke, Shitang, 2022. "Experimental investigation on noise characteristics of small scale vertical axis wind turbines in urban environments," Renewable Energy, Elsevier, vol. 200(C), pages 970-982.
    5. Fathabadi, Hassan, 2020. "Novel solar collector: Evaluating the impact of nanoparticles added to the collector’s working fluid, heat transfer fluid temperature and flow rate," Renewable Energy, Elsevier, vol. 148(C), pages 1165-1173.
    6. Korres, D.N. & Tzivanidis, C., 2019. "Numerical investigation and optimization of an experimentally analyzed solar CPC," Energy, Elsevier, vol. 172(C), pages 57-67.
    7. Kumar, Raj & Kumar, Sushil & Nadda, Rahul & Kumar, Khusmeet & Goel, Varun, 2022. "Thermo-hydraulic efficiency and correlation development of an indoor designed jet impingement solar thermal collector roughened with discrete multi-arc ribs," Renewable Energy, Elsevier, vol. 189(C), pages 1259-1277.
    8. Dimitrios N. Korres & Evangelos Bellos & Christos Tzivanidis, 2022. "Integration of a Linear Cavity Receiver in an Asymmetric Compound Parabolic Collector," Energies, MDPI, vol. 15(22), pages 1-19, November.
    9. Ataee, Sadegh & Ameri, Mehran & Askari, Ighball Baniasad & Keshtegar, Behrooz, 2024. "Evaluation and intelligent forecasting of energy and exergy efficiencies of a nanofluid-based filled-type U-pipe solar ETC using three machine learning approaches," Energy, Elsevier, vol. 298(C).
    10. Korres, Dimitrios N. & Tzivanidis, Christos, 2022. "A novel asymmetric compound parabolic collector under experimental and numerical investigation," Renewable Energy, Elsevier, vol. 199(C), pages 1580-1592.
    11. Khanlari, Ataollah & Sözen, Adnan & Afshari, Faraz & Tuncer, Azim Doğuş, 2021. "Energy-exergy and sustainability analysis of a PV-driven quadruple-flow solar drying system," Renewable Energy, Elsevier, vol. 175(C), pages 1151-1166.
    12. Mi, Peiyuan & Zhang, Jili & Gao, Jin & Han, Youhua, 2023. "Study on optimal allocation of solar photovoltaic thermal heat pump integrated energy system for domestic hot water," Renewable Energy, Elsevier, vol. 219(P1).
    13. Liu, Shuaishuai & Yang, Bin & Zhi, Yuan & Yu, Xiaohui, 2023. "Thermal-mechanical performance analysis of parabolic trough receivers under various optical errors based on coupled optical-thermal-stress model," Renewable Energy, Elsevier, vol. 210(C), pages 687-700.
    14. Wang, Lu & Yuan, JianJuan & Qiao, Xu & Kong, Xiangfei, 2023. "Optimal rule based double predictive control for the management of thermal energy in a distributed clean heating system," Renewable Energy, Elsevier, vol. 215(C).
    15. Nie, Wen & Jiang, Chenwang & Liu, Qiang & Guo, Lidian & Hua, Yun & Zhang, Haonan & Jiang, Bingyou & Zhu, Zilian, 2024. "Study of highly efficient control and dust removal system for double-tunnel boring processes in coal mines," Energy, Elsevier, vol. 289(C).
    16. Bhowmik, Mrinal & Muthukumar, P. & Anandalakshmi, R., 2019. "Experimental based multilayer perceptron approach for prediction of evacuated solar collector performance in humid subtropical regions," Renewable Energy, Elsevier, vol. 143(C), pages 1566-1580.
    17. Liu, Shuaishuai & Yang, Bin & Yu, Xiaohui, 2023. "Impact of installation error and tracking error on the thermal-mechanical properties of parabolic trough receivers," Renewable Energy, Elsevier, vol. 212(C), pages 197-211.
    18. Yılmaz, İbrahim Halil & Mwesigye, Aggrey & Kılıç, Fatih, 2023. "Prioritization of heat transfer fluids in parabolic trough solar systems using CFD-assisted AHP-VIKOR approach," Renewable Energy, Elsevier, vol. 210(C), pages 751-768.
    19. Vishal Dabra & Avadhesh Yadav, 2020. "Performance analysis and comparison of glazed and unglazed solar air collector," Environment, Development and Sustainability: A Multidisciplinary Approach to the Theory and Practice of Sustainable Development, Springer, vol. 22(2), pages 863-881, February.
    20. Al-Zahrani, Salman, 2023. "Thermal performance augmentation of solar air heater with curved path," Energy, Elsevier, vol. 284(C).

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:eee:energy:v:297:y:2024:i:c:s0360544224011034. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Catherine Liu (email available below). General contact details of provider: http://www.journals.elsevier.com/energy .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.