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<p>In response to the national strategy for energy conservation and emission reduction, and to enhance the efficiency of clean energy utilization, this study focuses on a public bathhouse of an industrial and mining enterprise located in Wuhai City, a severely cold region. Addressing the challenges of high energy consumption, excessive carbon emissions, and insufficient thermal comfort in the original system, a novel air-source–sewage-source dual-source heat pump system with coordinated energy storage is proposed and constructed. A system model is developed in TRNSYS, in which the air-source heat pump serves as the primary heat source and the sewage-source heat pump as the auxiliary heat source. Combined with a large-scale thermal storage tank and a time-of-use electricity pricing regulation strategy, the system achieves “peak shaving and valley filling” by storing energy during off-peak hours and releasing it during non-off-peak hours. Simultaneously, sewage waste heat recovery and thermal storage buffering are employed to improve system adaptability under low-temperature and load-fluctuation conditions. Simulation and experimental results demonstrate that the system can save approximately 414,400 kWh of electricity annually, reduce operating costs by about 253,800 CNY, cut CO₂ emissions by roughly 291.12 t, and significantly improve users’ thermal comfort. The findings indicate that the dual-source coordination and intelligent energy storage regulation model not only offers remarkable energy-saving and emission-reduction benefits as well as strong economic performance, but also shows broad prospects for engineering application and promotion in public bathhouses of industrial and mining enterprises in severely cold regions.</p>

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Application and analysis of an air–wastewater dual-source heat pump cooperative thermal energy storage system for bathhouse buildings in severe cold regions

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年3月14日

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  • Jianhua Han,
  • Xin Bai,
  • Yuqing Zhou,
  • Wei Yang,
  • Zongqun Yu

摘要

In response to the national strategy for energy conservation and emission reduction, and to enhance the efficiency of clean energy utilization, this study focuses on a public bathhouse of an industrial and mining enterprise located in Wuhai City, a severely cold region. Addressing the challenges of high energy consumption, excessive carbon emissions, and insufficient thermal comfort in the original system, a novel air-source–sewage-source dual-source heat pump system with coordinated energy storage is proposed and constructed. A system model is developed in TRNSYS, in which the air-source heat pump serves as the primary heat source and the sewage-source heat pump as the auxiliary heat source. Combined with a large-scale thermal storage tank and a time-of-use electricity pricing regulation strategy, the system achieves “peak shaving and valley filling” by storing energy during off-peak hours and releasing it during non-off-peak hours. Simultaneously, sewage waste heat recovery and thermal storage buffering are employed to improve system adaptability under low-temperature and load-fluctuation conditions. Simulation and experimental results demonstrate that the system can save approximately 414,400 kWh of electricity annually, reduce operating costs by about 253,800 CNY, cut CO₂ emissions by roughly 291.12 t, and significantly improve users’ thermal comfort. The findings indicate that the dual-source coordination and intelligent energy storage regulation model not only offers remarkable energy-saving and emission-reduction benefits as well as strong economic performance, but also shows broad prospects for engineering application and promotion in public bathhouses of industrial and mining enterprises in severely cold regions.