滑冰场用跨临界/亚临界CO2压缩循环综合冷热源系统的基础问题研究

本项目针对传统制冷剂替代的迫切需求和滑冰场的多种不同品位的制冷与热回收需求，构建了基于多级热回收、并行压缩、高效引射和高效换热等关键技术的CO2跨临界/亚临界压缩循环的综合冷热源系统。通过理论分析、实验测试和仿真建模研究，获得变负荷需求、变运行模式和全年宽温区条件下的各项关键技术模块和整个系统的变工况运行特性，实现基于蒸气压缩循环能效系数和传热系统“火积耗散”指标的多目标协同优化。建立适用于冰雪场馆及类似建筑的多功能CO2跨临界/亚临界压缩循环综合冷热源系统的优化设计方法和变工况运行控制策略，为冰雪场馆及类似建筑的综合冷热源系统的共性技术难题提供解决方案，促进我国冰雪运动和冰雪场馆建设事业的发展。

CO2 is one of the best choices for the phase-out of traditional refrigerants. For the requirements of concurrent cooling and heating with different temperatures in ice rink, the transcritical/subcritical CO2 compression system is proposed with the key technologies such as multi-stage heat recovery, parallel compression, ejector, et al. Based on the theoretical analysis, experimental test and computer simulation, the operating characteristics of these key technologies and the whole CO2 system are obtained under variable working conditions of the load ratio, heat amount, and outdoor air temperature through the whole year. The optimization of the system design and operation are carried out for the synergy of the efficiency of the CO2 compression cycle and the entransy dissipation of the heat recovery system. It is presented the optimal design guideline and operation control strategy of the concurrent cooling and heating system based on the transcritical/subcritical CO2 compression cycle for rice rink or similar applications. The above works will boost the development of winter sports, the ice and snow stadiums and the ice-snow sports industry.