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Experimental investigations on thermal performance of phase change material – Trombe wall system enhanced by delta winglet vortex generators

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  • Zhou, Guobing
  • Pang, Mengmeng

Abstract

Experiments have been performed on the thermal behavior of a PCM (phase change material) – Trombe wall system with heat transfer enhancement by DWVGs (delta winglet vortex generators). PCM (CaCl2·6H2O) slabs were attached on the gap – side wall surface to increase the heat storage. Delta winglet VG pairs (attack angle β = 45°, ratio of length to height l/h = 2) were arranged on the surface of PCM panel to enhance the air side convective heat transfer in the gap. The VG height, pitch and locations were also evaluated. The results showed that the delta winglet VG pairs really enhanced the heat transfer rate at the surface of PCM panel during both the charging and discharging processes. Accordingly, the gap air flow rate and heating rate to the room with a single row of delta winglet VG pairs are 28.5% and 39.4% higher than the case without VGs. Delta winglet VG pairs with height of 30 mm, front edge pitch of 2 mm, lateral spacing of 225 mm and vertical spacing of 340 mm give best thermal performance under present conditions. The results indicate the advantages of using longitudinal vortex generators to improve the performance of PCM – Trombe wall systems for passive solar heating.

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  • Zhou, Guobing & Pang, Mengmeng, 2015. "Experimental investigations on thermal performance of phase change material – Trombe wall system enhanced by delta winglet vortex generators," Energy, Elsevier, vol. 93(P1), pages 758-769.
    • Handle: RePEc:eee:energy:v:93:y:2015:i:p1:p:758-769
    DOI: 10.1016/j.energy.2015.09.096
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    References listed on IDEAS

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    5. Zhu, Na & Li, Shanshan & Hu, Pingfang & Lei, Fei & Deng, Renjie, 2019. "Numerical investigations on performance of phase change material Trombe wall in building," Energy, Elsevier, vol. 187(C).
    6. Ye, Rongda & Lin, Wenzhu & Yuan, Kunjie & Fang, Xiaoming & Zhang, Zhengguo, 2017. "Experimental and numerical investigations on the thermal performance of building plane containing CaCl2·6H2O/expanded graphite composite phase change material," Applied Energy, Elsevier, vol. 193(C), pages 325-335.
    7. Yuan, Yanping & Gao, Xiangkui & Wu, Hongwei & Zhang, Zujin & Cao, Xiaoling & Sun, Liangliang & Yu, Nanyang, 2017. "Coupled cooling method and application of latent heat thermal energy storage combined with pre-cooling of envelope: Method and model development," Energy, Elsevier, vol. 119(C), pages 817-833.
    8. Aleksejs Prozuments & Anatolijs Borodinecs & Guna Bebre & Diana Bajare, 2023. "A Review on Trombe Wall Technology Feasibility and Applications," Sustainability, MDPI, vol. 15(5), pages 1-15, February.
    9. Ling, Haoshu & Wang, Liang & Chen, Chao & Chen, Haisheng, 2019. "Numerical investigations of optimal phase change material incorporated into ventilated walls," Energy, Elsevier, vol. 172(C), pages 1187-1197.
    10. Wang, Dengjia & Hu, Liang & Du, Hu & Liu, Yanfeng & Huang, Jianxiang & Xu, Yanchao & Liu, Jiaping, 2020. "Classification, experimental assessment, modeling methods and evaluation metrics of Trombe walls," Renewable and Sustainable Energy Reviews, Elsevier, vol. 124(C).
    11. Xiao, Yuling & Zhang, Tao & Liu, Zihao & Fei, Fan & Fukuda, Hiroatsu, 2023. "Optimizing energy efficiency in HSCW buildings in China through temperature-controlled PCM Trombe wall system," Energy, Elsevier, vol. 278(PB).
    12. Jerzy Szyszka, 2022. "From Direct Solar Gain to Trombe Wall: An Overview on Past, Present and Future Developments," Energies, MDPI, vol. 15(23), pages 1-25, November.
    13. Zhou, Shiqiang & Razaqpur, A. Ghani, 2022. "Efficient heating of buildings by passive solar energy utilizing an innovative dynamic building envelope incorporating phase change material," Renewable Energy, Elsevier, vol. 197(C), pages 305-319.

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