唐建平¹,康丽霞^1,2,刘永忠^1,2

• 1:西安交通大学 化工系，陕西西安 710049
• 2:陕西省能源化工过程强化重点实验室，陕西西安 710049

摘要(Abstract)：

针对单/双压蒸发有机朗肯循环（ORC）系统的工质和结构选择问题，结合Aspen Plus模拟和夹点理论分析，以120~200℃的低温热源为例，对单\双压蒸发ORC系统在不同工质条件下的热力学性能和换热过程进行了研究。结果表明：热源和工质换热形成的夹点类型是单/双压蒸发ORC系统结构选择的关键。对于单压蒸发ORC，随着工质临界温度的降低，工质在最优条件下与热源形成的夹点类型由泡点夹点（VPP）逐渐变为泡点和进口双夹点（VPP&PPP），并最终形成单独的进口夹点（PPP）；在形成VPP&PPP双夹点时，单压蒸发系统效率达到最大；研究还指出VPP&PPP双夹点是单/双蒸发结构选择的临界点，并据此获得了单/双压蒸发系统结构选择的定量关联式，为ORC系统工质和结构的选择提供了定量分析基础。

关键词(KeyWords)： 低温余热;有机朗肯循环;双压蒸发结构;过程模拟;夹点

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金（21808179，21878240）。

作者(Author): 唐建平¹,康丽霞^1,2,刘永忠^1,2

DOI: 10.3969/j.issn.1003-9015.2021.05.017

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