Performance Analysis of Indirect Natural Circulation PVT System for Domestic Hot Water

  • Zhen Guo
  • Ruobing LiangEmail author
  • Jili Zhang
  • Ahmad Riaz
Conference paper
Part of the Environmental Science and Engineering book series (ESE)


In this paper, the performance of an indirect natural circulation PVT system for domestic hot water with refrigerant as the circulating working medium was discussed and analyzed experimentally, including thermal performance, photovoltaic performance, overall efficiency, responding speed, heat exchange state, and temperature distribution at different positions. The influence of different five radiation intensities was tested. The results indicate that the performance is largely influenced by radiation intensity. The response speed of the system is greatly improved. It can complete the start-up within 5 min and maintain stable operation at relatively high efficiency. The superheat degree stays between 3 and 4 °C, which is not affected by the radiation intensity, but the sub-cooling degree of the liquid medium increases with the increasing of radiation intensity. Furthermore, the temperature of the panel all reaches the superheat range, but the superheat degree in the middle of the panel is the largest. The temperature distribution is not uniform, which needs to be optimized further.


Solar energy PVT Natural circulation Domestic hot water 



This study was supported by National Key Research and Development of China (Grant No. 2017YFC0704202).


  1. 1.
    Hosseinzadeh, M., Sardarabadi, M., Passandideh-Fard, M.: Energy and exergy analysis of nano fluid based photovoltaic thermal system integrated with phase change material. Energy 147, 636–647 (2018)CrossRefGoogle Scholar
  2. 2.
    Kong, W., Wang, Z., Li, X.: Test method for evaluating and predicting thermal performance of thermosyphon solar domestic hot water system. Appl. Therm. Eng. 146, 12–20 (2019)CrossRefGoogle Scholar
  3. 3.
    Azzolin, M., Mariani, A., Moro, L.: Mathematical model of a thermosyphon integrated storage solar collector. Renew. Energy 128, 400–415 (2018)CrossRefGoogle Scholar
  4. 4.
    Shi, Q., Lv, J., Guo, C.: Experimental and simulation analysis of a PV/T system under the pattern of natural circulation. Appl. Therm. Eng. 121, 828–837 (2017)CrossRefGoogle Scholar
  5. 5.
    Saravanan, A., Senthilkumaar, J.S., Jaisankar, S.: Experimental studies on heat transfer and friction factor characteristics of twist inserted V-trough thermosyphon solar water heating system. Energy 112, 642–654 (2016)CrossRefGoogle Scholar
  6. 6.
    Ziapour, B.M., Khalili, M.B.: PVT type of the two-phase loop mini tube thermosyphon solar water heater. Energy Convers. Manag. 129, 54–61 (2016)CrossRefGoogle Scholar
  7. 7.
    Cao, J., Pei, G., Bottarelli, M.: Effect of non-condensable gas on the behaviours of a controllable loop thermosyphon under active control. Appl. Therm. Eng. 146, 288–294 (2019)CrossRefGoogle Scholar
  8. 8.
    Herrando, M., Markides, C.N., Hellgardt, K.: A UK-based assessment of hybrid PV and solar-thermal systems for domestic heating and power: system performance. Appl. Energy 122, 288–309 (2014)CrossRefGoogle Scholar
  9. 9.
    Shan, F., Cao, L., Fang, G.: Dynamic performances modeling of a photovoltaic–thermal collector with water heating in buildings. Energy Build. 66, 485–494 (2013)CrossRefGoogle Scholar

Copyright information

© Springer Nature Singapore Pte Ltd. 2020

Authors and Affiliations

  • Zhen Guo
    • 1
  • Ruobing Liang
    • 1
    Email author
  • Jili Zhang
    • 1
  • Ahmad Riaz
    • 1
  1. 1.Dalian University of TechnologyDalianChina

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