一种全工况自适应的二氧化碳供暖热泵  

An Adaptive CO_(2) Heat Pump Across Full Operating Conditions for Space Heating

作　　者：何宇佳 邵亮亮[1] 曹祥[1] 张春路[1] HE Yujia;SHAO Liangliang;CAO Xiang;ZHANG Chunlu(School of Mechanical Engineering,Tongji University,Shanghai 201804,China)

机构地区：[1]同济大学机械与能源工程学院,上海201804

出　　处：《工程热物理学报》2025年第1期68-71,共4页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.52076150)。

摘　　要：CO_(2)热泵具有良好的低温供热能力和环保性。然而,在供暖场景下,单一模式的CO_(2)热泵难以应对多变的工况。为解决这一问题,本文从热力循环融合和换热匹配优化两个层面提出了一种能够在全工况下自适应最优运行的CO_(2)热泵供暖系统。在热力循环融合层面,该系统具备切换运行机械过冷跨临界CO_(2)循环和过热回收复叠循环的能力。而在换热匹配优化层面,系统通过拆分换热器实现多级加热,从而提升温度场的均匀性。通过仿真分析,本文构建了适应变工况的自适应切换策略,为全工况CO_(2)热泵的实际运行提供指导。最后,通过对比分析,新系统的全供暖季能效相较于现有系统可提升1.9%∼17.7%。CO_(2) heat pumps demonstrate excellent low-temperature heating capability and environmental friendliness.However,a single-mode CO_(2) heat pump faces challenges in adapting to diverse operating conditions in space heating.To address this issue,this paper proposes a self-adaptive CO_(2) heat pump capable of operating under all conditions,focusing on the following two aspects.The first involves cycle integration,enabling the system to switch between a mechanically-subcooled transcritical CO_(2) cycle and a superheat-recovered cascade cycle.Next is the heat exchange matching.By splitting and rearranging the heat exchangers,the system achieves multi-stage heating to enhance the uniformity of the temperature field.Through simulations,adaptive switching strategies are established for variable operating conditions,providing guidance for practical operation.Finally,the overall seasonal efficiency of the new system is shown to improve by 1.9%to 17.7%compared to the existing system.

关 键 词：二氧化碳热泵 空间供暖 热力循环融合 自适应运行 能效提升 

分 类 号：TB65[一般工业技术—制冷工程]