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Numerical analysis of temperature non-uniformity and cooling capacity for capillary ceiling radiant cooling panel

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  • Xie, Dong
  • Wang, Yun
  • Wang, Hanqing
  • Mo, Shunquan
  • Liao, Maili

Abstract

Capillary ceiling radiant cooling panel is a high temperature cooling system, which could pose low energy consumption to meet thermal comfort requirements. A computational fluid dynamics (CFD) simulation study on heat transfer of chilled water flow in the capillary of ceiling radiant cooling panel was performed to attain surface temperature distributions and cooling capacities. Six influencing factors included chilled water inlet parameters, conditions of gypsum plaster and capillary mats structural parameters were considered to obtain the complicated relationships between capillary radiant panel conditions and heat transfer performance. The index of temperature non-uniformity coefficient was proposed to evaluate temperature profiles of ceiling panel surface. The results of the simulation were compared with the values depicted in ASHRAE Handbook and good agreement had been achieved. The average difference between simulation results and the values reported by ASHRAE handbook was within the region of 15%. The research results showed that temperature non-uniformity coefficient was negatively correlated with temperature of chilled inlet water (linear correlation), water velocity (correlation coefficient R = −0.85), and pipe diameter (correlation coefficient R = −0.93), but positively and linearly correlated with tube spacing. Cooling capacity was found to have negative linear correlation with temperature of chilled inlet water, covering thickness and tube spacing.

Suggested Citation

  • Xie, Dong & Wang, Yun & Wang, Hanqing & Mo, Shunquan & Liao, Maili, 2016. "Numerical analysis of temperature non-uniformity and cooling capacity for capillary ceiling radiant cooling panel," Renewable Energy, Elsevier, vol. 87(P3), pages 1154-1161.
    • Handle: RePEc:eee:renene:v:87:y:2016:i:p3:p:1154-1161
    DOI: 10.1016/j.renene.2015.08.029
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    Citations

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    Cited by:

    1. Liu, Long & Wang, Mingqing & Chen, Yu, 2019. "A practical research on capillaries used as a front-end heat exchanger of seawater-source heat pump," Energy, Elsevier, vol. 171(C), pages 170-179.
    2. Lu, Yanyu & Dong, Jiankai & Liu, Jing, 2020. "Zonal modelling for thermal and energy performance of large space buildings: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 133(C).
    3. Zhengrong Li & Dongkai Zhang & Cui Li, 2020. "Experimental Study on Thermal Response Characteristics of Indoor Environment with Modular Radiant Cooling System," Energies, MDPI, vol. 13(19), pages 1-13, September.
    4. Luo, Yongqiang & Zhang, Ling & Wu, Jing & Liu, Zhongbing & Wu, Zhenghong & He, Xihua, 2017. "Dynamical simulation of building integrated photovoltaic thermoelectric wall system: Balancing calculation speed and accuracy," Applied Energy, Elsevier, vol. 204(C), pages 887-897.
    5. Ismail, Nagham & Ouahrani, Djamel, 2022. "Modelling of cooling radiant cubicle for an office room to test cooling performance, thermal comfort and energy savings in hot climates," Energy, Elsevier, vol. 244(PB).
    6. Mohammad Hakim Mohd Radzai & Chong Tak Yaw & Chin Wai Lim & Siaw Paw Koh & Nur Amirani Ahmad, 2021. "Numerical Analysis on the Performance of a Radiant Cooling Panel with Serpentine-Based Design," Energies, MDPI, vol. 14(16), pages 1-20, August.
    7. Víctor Echarri-Iribarren & Carlos Rizo-Maestre & Fernando Echarri-Iribarren, 2018. "Healthy Climate and Energy Savings: Using Thermal Ceramic Panels and Solar Thermal Panels in Mediterranean Housing Blocks," Energies, MDPI, vol. 11(10), pages 1-32, October.

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