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Air-source heat pump heating system with a new temperature and hydraulic-balance control strategy: A field experiment in a teaching building

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  • Zhou, Chaohui
  • Ni, Long
  • Li, Jun
  • Lin, Zeri
  • Wang, Jun
  • Fu, Xuhui
  • Yao, Yang

Abstract

Owing to the government's policy of clean-energy heating reform, air-source heat pump (ASHP) heating projects are growing rapidly in number in China, and an efficient operation mode for this type of heating system has become an issue for researchers. In this study, a new temperature and hydraulic-balance control strategy is proposed for ASHP heating systems. This strategy utilizes the cooperation of three different devices: room thermostats, pressure independent balancing and control valves, and a differential pressure relief controller. Two almost identical ASHP heating systems in areas A and B of a teaching building, one with the new control strategy (system A), were field tested. The operation mode was divided into two periods of school terms with a return water temperature of 35 °C for heating and winter vacation with a temperature of 20 °C for frost protection. Through a 67-day monitoring of operating performance, the results showed that system A could not only realize a more suitable indoor temperature, but also provided on-demand heating with the setting of thermostats. This new control strategy will not affect the COP of ASHP. Compared with system B, a significant energy conservation achievement of 38.6% heat savings and 31.5% electricity savings was achieved for system A during the school term. Moreover, the static payback period for the devices of the new control strategy is only 1.46 years. System A can realize a further positive environmental benefit with a 37.2% reduction in emissions.

Suggested Citation

  • Zhou, Chaohui & Ni, Long & Li, Jun & Lin, Zeri & Wang, Jun & Fu, Xuhui & Yao, Yang, 2019. "Air-source heat pump heating system with a new temperature and hydraulic-balance control strategy: A field experiment in a teaching building," Renewable Energy, Elsevier, vol. 141(C), pages 148-161.
    • Handle: RePEc:eee:renene:v:141:y:2019:i:c:p:148-161
    DOI: 10.1016/j.renene.2019.03.143
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    References listed on IDEAS

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    Cited by:

    1. Wei, Wenzhe & Ni, Long & Li, Shuyi & Wang, Wei & Yao, Yang & Xu, Laifu & Yang, Yahua, 2020. "A new frosting map of variable-frequency air source heat pump in severe cold region considering the variation of heating load," Renewable Energy, Elsevier, vol. 161(C), pages 184-199.
    2. Yijiang Zeng & Shengyu Li & Jun Lu & Xiaodong Li & Dingding Xing & Jipan Xiao & Zhanhao Zhang & Leihong Li & Xuhui Shi, 2023. "Research on Energy Savings of an Air-Source Heat Pump Hot Water System in a College Student’s Dormitory Building," Sustainability, MDPI, vol. 15(13), pages 1-24, June.
    3. Carroll, P. & Chesser, M. & Lyons, P., 2020. "Air Source Heat Pumps field studies: A systematic literature review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 134(C).
    4. Pu, Jihong & Shen, Chao & Zhang, Chunxiao & Liu, Xingjiang, 2021. "A semi-experimental method for evaluating frosting performance of air source heat pumps," Renewable Energy, Elsevier, vol. 173(C), pages 913-925.
    5. Zhong, Shengyuan & Zhao, Jun & Li, Wenjia & Li, Hao & Deng, Shuai & Li, Yang & Hussain, Sajjad & Wang, Xiaoyuan & Zhu, Jiebei, 2021. "Quantitative analysis of information interaction in building energy systems based on mutual information," Energy, Elsevier, vol. 214(C).
    6. Zhou, Chaohui & Ni, Long & Wang, Jun & Yao, Yang, 2020. "Investigation on the performance of ASHP heating system using frequency-conversion technique based on a temperature and hydraulic-balance control strategy," Renewable Energy, Elsevier, vol. 147(P1), pages 141-154.
    7. Sun, Xiaoyu & Wang, Zhichao & Li, Xiaofeng & Xu, Zhaowei & Yang, Qiang & Yang, Yingxia, 2021. "Seasonal heating performance prediction of air-to-water heat pumps based on short-term dynamic monitoring," Renewable Energy, Elsevier, vol. 180(C), pages 829-837.

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