摘要
基于氨/二氧化碳复叠系统理论循环,研究了低温级蒸发温度、冷凝温度和冷凝蒸发换热温差对各过程损率、循环效率和COP的影响。低温级蒸发温度升高,蒸发过程损失减小明显,循环效率和COP增加;低温级冷凝温度升高,循环效率和COP均呈先上升后下降趋势,最优的冷凝温度为-10℃;冷凝蒸发换热温差,对循环效率和COP具有重要影响。
Based on the theoretical circuit of Ammonia/Carbon dioxide cascade system, the exergy loss efficiency for each process and the exergy efficiency and COP for the cycle were studied by analyzing the in- fluences of evaporation temperature and condensing temperature of low-temperature system and difference temperature in condensing-evaporation heat exchanger. The result showed that the exergy efficiency and COP increased with improving the evaporation temperature of low-temperature system. The changing tenden- cy of exergy efficiency and COP with condensing temperature of low-temperature system indicated - 10 ℃ was the optimal condensing temperature for the work condition. The exergy efficiency and COP were also af- fected by the difference temperature in condensing-evaporation heat exchanger for the system.
出处
《低温工程》
CAS
CSCD
北大核心
2012年第5期37-40,共4页
Cryogenics
关键词
二氧化碳
复叠系统
性能
Carbon dioxide
cascade system
performance
