Two-stage evaporation strategy to improve system performance for organic Rankine cycle
Two-stage evaporation strategy to improve system performance for organic Rankine cycle
复制标题
提高有机朗肯循环系统性能的两级蒸发策略
DOI：
10.1016/j.apenergy.2015.04.016
复制
发表时间：
2015-07
期刊：
影响因子：
11.2
通讯作者：
Yujie Hu
中科院分区：
文献类型：
--
作者：
Tailu Li;Zhigang Zhang;Jian Lu;Junlan Yang;Yujie Hu
有机朗肯循环（ORC）是一种很有前途的热回收技术。而蒸发器的不可逆损失最大，导致循环效率降低。本文将热源划分为两个温度区间，提供了两段蒸发的可能性。基于循环结构，提出了并联两段有机朗肯循环（PTORC）和串联两段有机朗肯循环（STORC）。目标是评估系统性能，从而阐明它们各自的可用性。地热水进口温度（GWIT）为90 ~ 120℃，工作流体为R245fa。选择净输出功率与总导热系数之比作为目标函数。结果表明，中温和蒸发温度对PTORC和STORC有显著影响。PTORC和STORC均能显著降低不可逆损失，其中STORC的作用更为显著。PTORC和STORC可以输出更多的净功率，具体取决于周期配置和GWIT。STORC通过GWIT提高了净功率输出，而PTORC恰恰相反。PTORC和STORC的总热导率与ORC基本相等。STORC具有更优异的系统性能，值得在工程应用中推广。
The organic Rankine cycle (ORC) is a promising technology for heat recovery. However, evaporator leads to the highest irreversible loss and results in reducing cycle efficiency. In this paper, the heat source was segmented into two temperature ranges, which provides the possibility of two-stage evaporation. Based on cycle configuration, parallel two-stage organic Rankine cycle (PTORC) and series two-stage organic Rankine cycle (STORC) were put forward. The objective is to evaluate system performances, thereby elucidating their respective availability. Geothermal water inlet temperature (GWIT) ranges from 90 to 120 °C, with R245fa as the working fluid. The ratio of net power output to the total thermal conductance was chosen as the objective function. The results show that PTORC and STORC are significantly influenced by intermediate geothermal water temperature (IGWT) and evaporating temperatures. PTORC and STORC could evidently reduce the irreversible loss, and STORC is more significant. PTORC and STORC can output more net power, depending on cycle configuration and GWIT. STORC enhances the net power output with GWIT, whereas PTORC is just the opposite. The total thermal conductance of PTORC and STORC are almost equal with that of ORC. STORC presents more excellent system performance and deserves to be popularized in engineering applications.
登录
查看更多内容
再生式有机朗肯循环低温太阳能热发电分析
影响因子：
6.4
作者：
Li, Jing;Ji, Jie;Pei, Gang
通讯作者：
Pei, Gang
影响因子：
11.2
作者：
Jiang Wang;Li Zhao;Xiangxiang Wang
通讯作者：
Jiang Wang;Li Zhao;Xiangxiang Wang
影响因子：
10.4
作者：
G. Shu;Lina Liu;H. Tian;Haiqiao Wei;Xiaofei Xu
通讯作者：
G. Shu;Lina Liu;H. Tian;Haiqiao Wei;Xiaofei Xu
影响因子：
4.6
作者：
P. Mago;K. Srinivasan;L. Chamra;C. Somayaji
通讯作者：
P. Mago;K. Srinivasan;L. Chamra;C. Somayaji
影响因子：
4.6
作者：
Tai-lu Li;Jia-ling Zhu;Wei Zhang;Jun Li
通讯作者：
Tai-lu Li;Jia-ling Zhu;Wei Zhang;Jun Li