冷热双蓄太阳能喷射—压缩耦合制冷系统性能分析

Analysis of Performance of Solar Injection-compression Coupled Refrigeration System with Both Cold and Heat Storage

本文提出了一种冷热双蓄太阳能喷射—压缩耦合制冷系统,并建立了相应的数学模型。该系统以R141b为制冷工质,太原地区的气象参数作为输入,结合TRNSYS软件进行了建筑模拟和系统的仿真计算,全面分析了连续典型气象日内系统的运行情况及热性能。结果表明,太阳能集热器有用能不为零时,集热器效率随太阳辐射强度同增减;拓宽太阳能喷射制冷系统在最大喷射系数下的运行时间,可以增加系统的制冷量;系统的制冷量在与用户冷负荷需求达到平衡的状态下,系统更加有效的利用了太阳能;在连续典型气象日内,太阳能喷射制冷子系统可为用户提供59.3%的冷量,系统与传统的蓄热型太阳能喷射—压缩联合制冷系统相比可节约132 863 kJ电能,综合性能系数COP0可达0.253。

This paper proposed solar injection-compression coupled refrigeration system with both cold and heat storage, and constructed the corresponding mathematical model. This system used R141b as refrigerant,input meteorological parameters in Taiyuan, and combined TRNSYS simulation software for building simulation and simulation computation of the system, and conducted a comprehensive analysis of operation and thermal performance of the system during consecutive typical meteorological days. The results show that when useful energy in solar collector is not zero, collection efficiency of collector changed with intensity of solar radiation; extension of operating time of solar ejection refrigeration system under maximum injection coefficient could increase the system＇s refrigerating capacity ; refrigerating capacity of the system uses more efficiently solar energy when it reached its balance together with the user＇s cooling load demand; during the consecutive typical meteorological days, solar ejection refrigeration subsystem can provide the user with 59.3% of the refrigeration capacity,and compared with conventional solar injection-compression coupled refrigeration system with heat storage,this system can save 132 863 KJ electric energy,whose COPo can reach 0. 253.