基于制冷剂泄出的双温热泵特性研究

为满足生产生活中双温供暖供热的需求，提出了一种基于制冷剂泄出的双温热泵系统。建立基于制冷剂泄出的涡旋压缩机数理模型和系统模型并进行数值模拟验证，计算分析系统在不同泄出口位置、泄出口大小、蒸发温度、高温冷凝温度、中温冷凝温度下系统各项性能参数的变化趋势，并与传统双温热泵系统进行对比分析。结果表明，压缩机中间泄出口打开越早压缩机耗功越少、泄出口越大系统节能效果越明显，较传统双温热泵系统制热性能系数在不同工况下都有显著提高，最高可提升16%。所提模型为制冷剂泄出式双温热泵、补气增焓热泵系统的理论分析提供了更有效方法，为涡旋压缩机性能优化和双温热泵系统的研究、设计及系统性能的提升提供了理论参考。

Research on the characteristics of dual-temperature heat pump based on refrigerant leakage

In order to meet the demand for dual-temperature heating in production and life, a dual-temperature heat pump system based on refrigerant leakage was proposed. By establishing and verifying the mathematical model and system model of the scroll compressor based on refrigerant leakage for numerical simulation, the system was calculated and analyzed under different discharge outlet positions, discharge outlet sizes, evaporation temperatures, high-temperature condensation temperatures, and medium-temperature condensation temperatures. The changing trends of performance parameters were compared with traditional dual-temperature heat pump systems. The results show that the sooner the middle discharge port of the compressor is opened, the less power the compressor consumes, and the larger the discharge port is, the more obvious the energy-saving effect of the system is; Compared with the traditional dual-temperature heat pump system, the heating performance coefficient is significantly improved under different working conditions, with the highest of 16%. The model proposed in the study provides a more effective method for the theoretical analysis of refrigerant leakage dual-temperature heat pumps and air-supplemented enthalpy-increasing heat pump systems, and the research results provide a theoretical basis for the optimization of scroll compressor performance, and the research, design and system performance improvement of dual-temperature heat pump systems.