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A model to compare convective and radiant heating systems for intermittent space heating

Author

Listed:
  • Wang, Zhe
  • Luo, Maohui
  • Geng, Yang
  • Lin, Borong
  • Zhu, Yingxin

Abstract

In this paper, a dynamic heat transfer model based on thermal-electrical analogy has been built to compare convective and radiative heating systems for intermittent heating. An experiment has been set up to validate the model we built. The RMS Error was within 0.5 °C, confirming the accuracy of the model. The validated model was then applied to compare four typical space heating systems, namely all-air, radiator, in-slab floor heating, and lightweight floor heating systems. The concept of “ineffective heat” has been proposed to explain why the intermittent heating could reduce heating load. Two ideal characters of heating systems have been identified for intermittent heating, i.e. high heating capacity and low thermal mass, both of which are crucial to shorten the preheat time and to reduce the ineffective heat. The results indicate that convective heating systems were more comfortable (more rapidly raise the indoor temperature) and more energy efficient (lower heating load) for intermittent operation than radiative heating systems. The performance gap between radiative and convective heating systems would be enlarged in colder conditions. Among the four heating systems, convective heating system was the most suitable one for intermittent heating, and floor heating was the most unsuitable one. Though belonging to radiative heating systems, the radiator performs differently from floor heating for its potential to enhance heating capacity and relatively low thermal mass. Additionally, outdoor climate and building thermal insulation level also affect the choice of the most suitable heating system and heating mode. The findings of this research might shed some light on the debate of the choice of space heating systems in areas with similar climate conditions with China’s Hot Summer Cold Winter region.

Suggested Citation

  • Wang, Zhe & Luo, Maohui & Geng, Yang & Lin, Borong & Zhu, Yingxin, 2018. "A model to compare convective and radiant heating systems for intermittent space heating," Applied Energy, Elsevier, vol. 215(C), pages 211-226.
  • Handle: RePEc:eee:appene:v:215:y:2018:i:c:p:211-226
    DOI: 10.1016/j.apenergy.2018.01.088
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    References listed on IDEAS

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    1. Sattari, S. & Farhanieh, B., 2006. "A parametric study on radiant floor heating system performance," Renewable Energy, Elsevier, vol. 31(10), pages 1617-1626.
    2. Ahn, Byung-Cheon & Song, Jae-Yeob, 2010. "Control characteristics and heating performance analysis of automatic thermostatic valves for radiant slab heating system in residential apartments," Energy, Elsevier, vol. 35(4), pages 1615-1624.
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    Cited by:

    1. Duan, Mengfan & Sun, Hongli & Wu, Shuangdui & Wu, Yifan & Lin, Borong, 2023. "A simplified model for the evaluation and comparison of the dynamic performance of different heating terminal types," Energy, Elsevier, vol. 263(PD).
    2. Ruixin Lv & Zhongyuan Yuan & Bo Lei & Jiacheng Zheng & Xiujing Luo, 2021. "Model Predictive Control with Adaptive Building Model for Heating Using the Hybrid Air-Conditioning System in a Railway Station," Energies, MDPI, vol. 14(7), pages 1-22, April.
    3. Gao, Datong & Zhao, Bin & Kwan, Trevor Hocksun & Hao, Yong & Pei, Gang, 2022. "The spatial and temporal mismatch phenomenon in solar space heating applications: status and solutions," Applied Energy, Elsevier, vol. 321(C).
    4. Zheng, Jinfu & Zhou, Zhigang & Zhao, Jianing & Hu, Songtao & Wang, Jinda, 2021. "Effects of intermittent heating on an integrated heat and power dispatch system for wind power integration and corresponding operation regulation," Applied Energy, Elsevier, vol. 287(C).
    5. Li, Jinwei & Ma, Rongjiang & Deng, Mengsi & Cao, Xiaoling & Wang, Xicheng & Wang, Xianlin, 2024. "A comparative study of clustering algorithms for intermittent heating demand considering time series," Applied Energy, Elsevier, vol. 353(PA).
    6. Dong, Jiankai & Zheng, Wenke & Ran, Zhilin & Zhang, Bei, 2021. "Experimental investigation on heating performance of a novel radiant-convective heating terminal," Renewable Energy, Elsevier, vol. 164(C), pages 804-814.
    7. Yu-Jin Hwang & Jae-Weon Jeong, 2021. "Energy Saving Potential of Radiant Floor Heating Assisted by an Air Source Heat Pump in Residential Buildings," Energies, MDPI, vol. 14(5), pages 1-14, March.

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