摘要
CO_2环境性质优秀,是较为理想的动力循环工质。针对常规CO_2跨临界动力循环冷凝器中工质难以被常规冷却水冷凝的问题,提出一种新型CO_2跨临界动力循环,并采用理论分析方法,研究了此循环的循环性能。结果表明,系统内部正循环质量流量保持不变,系统内部逆循环质量流量随冷却终温的升高而升高;循环净输出功率和循环热效率随冷却终温的升高而缓慢降低,随冷却压力的升高而降低;当冷却压力为7.5 MPa,冷却终温为30.5℃时,净输出功率为258.8kW,循环热效率为0.067。
CO_2 is an ideal working fluid because of its excellent environment properties.A novel CO_2 transcritical power cycle is put forward to solve the problem that working fluid is difficult to be condensed by traditional cooling water in conventional CO_2 transcritical power cycle.Besides,the cycle performance is investigated by theoretical analysis method.The results show that the mass flow rate in internal reverse circulation increases with rising the final cooled temperature when in internal normal circulation keeps constant.Net power output and thermal efficiency decrease with the increase of the final cooled temperature,as well as with the cooled pressure.In the condition with the cooled pressure of 7.5 MPa and the final cooled temperature of 30.5℃,the net power output can reach 258.8 kW and the thermal efficiency 0.067.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2015年第6期1182-1185,共4页
Journal of Engineering Thermophysics
基金
国家自然科学基金资助项目(No.51306198)
