CO_2跨临界双级压缩制冷循环的性能分析  

PERFORMANCE INVESTIGATION OF TRANSCRITICAL CARBON DIOXIDE TWO-STAGE COMPRESSION REFRIGERATION CYCLE

作　　者：杨俊兰[1] 姚钼超 苗国伟[1] 

机构地区：[1]天津城建大学能源与安全工程学院,天津300384

出　　处：《太阳能学报》2015年第8期1985-1989,共5页Acta Energiae Solaris Sinica

基　　金：天津市科委应用基础及前沿技术研究计划(10JCYBJC08300)

摘　　要：对带膨胀机的两种双级压缩循环(TCOP和TCDH)建立热力学模型,进行模拟计算,并与CO2单级循环(SCE)进行性能比较。研究表明,TCOP循环的COP比SCE循环高9%。在给定设计点,TCDH循环的COP分别比SCE和TCOP循环提高9.65%和0.72%。如果考虑设计和结构,并采取一些措施控制操作条件以防止偏离设计点,TCDH循环是一个可行的选择。The thermodynamics models were set up for two kinds of transcritical carbon dioxide two-stage compression cycles with expanders （TCOP and TCDH） to carry out simulation calculation and implement performance comparison with carbon dioxide single-stage compression cycle （SCE）. It is found that the COP of the TCOP cycle is 9% higher than that of the SCE cycle. At given design points, the COP of the TCDH cycle improves 9.65% and 0.72% over the SCE cycle and the TCOP cycle, respectively. If design and structure are also taken into account, the TCDH cycle is a feasible option. The key problem is to adopt some measures that control the operating condition to avoid deviating from the design point.

关 键 词：CO2跨临界循环 膨胀机 性能分析 双级压缩 

分 类 号：TK611[动力工程及工程热物理—生物能]