基于IEC技术的蒸发式布雷顿循环热力学性能研究  

Study on Thermodynamic Performance of Evaporative Brayton Cycle based on IEC Technology

作　　者：施其乐 何纬峰[1] 韩东[1] 高燕飞 苏鹏飞[2] SHI Qi-le;HE Wei-feng;HAN Dong;GAO Yan-fei;SU Peng-fei(Nanjing University of Aeronautics and Astronautics,College of Energy and Power Engineering,Nanjing,210016,China;Dongfang Electric Group,Dongfang Steam Turbine Co.,Ltd.,Deyang 618000,China)

机构地区：[1]南京航空航天大学能源与动力学院,江苏南京210016 [2]东方电气集团东方汽轮机有限公司,四川德阳618000

出　　处：《节能技术》2022年第6期502-508,共7页Energy Conservation Technology

基　　金：江苏省自然科学基金项目(BK2020129);江苏省重点研究开发项目(BE2019088)。

摘　　要：传统的蒸发式透平循环由于结构复杂使得成本高昂,难以商业化运行,因而开发集成度更高的加湿设备尤为必要。本文运用间接蒸发冷却(IEC)技术集成加湿、后冷、回热等过程于一体,研究了不同类型的饱和器,并发展出相应的数学模型。首次从布雷顿循环与朗肯循环协同运行的新角度,对运用不同饱和器的动力循环关键参数进行了敏感性分析。研究结果表明:预冷饱和器载水量优于回热饱和器,而双重饱和器结合了两者的特点,对于余热利用实现了最大化。协同循环模型也指出朗肯分循环的效率远高于布雷顿分循环。本文验证了带有预冷回热双重饱和器的动力循环在高效运行、高载水量、高输出功方面的优势和潜在应用前景。It is particularly vital to build a humidifier with higher integration because the existing evaporative turbine cycle’s complex structure makes it expensive and challenging to operate commercially.This paper incorporates humidification,aftercooling,and regenerative processes using indirect evaporative cooling(IEC)technology.Mathematical models are created in accordance with the research on various saturator kinds.The coordination of the Brayton cycle and Rankine cycle is considered for the first time when sensitivity analysis of the key power cycle parameters with various saturators is conducted.The results indicate that the precooling saturator has a higher water maximum load than the regenerative saturator,and the double saturator combines the advantages of the two to maximize the use of waste heat.The collaborative cycle model further emphasizes that the Rankine sub cycle has a much higher efficiency than the Brayton sub cycle.In high efficiency operation,high water load,and high output power,this paper reveals the advantages and prospective application prospects of power cycles with precooling and regenerative double saturators.

关 键 词：间接蒸发冷却 蒸发式透平循环 载水量 饱和器 余热利用 

分 类 号：TK115[动力工程及工程热物理—热能工程]