Design condition and operating strategy analysis of CO2 transcritical waste heat recovery system for engine with variable operating conditions
Design condition and operating strategy analysis of CO2 transcritical waste heat recovery system for engine with variable operating conditions
复制标题
变工况发动机CO2跨临界余热回收系统设计工况及运行策略分析
DOI：
10.1016/j.enconman.2017.02.067
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发表时间：
2017-06
影响因子：
10.4
通讯作者：
Guopeng Yu
中科院分区：
文献类型：
--
作者：
Gequn Shu;Xiaoya Li;Hua Tian;Lingfeng Shi;Xuan Wang;Guopeng Yu
利用二氧化碳跨临界动力循环(CTPC)回收废热，适合处理高温热源，实现小型化。考虑到发动机工况的多变性，本文的研究目的是揭示设计工况选择对CTPC系统的影响。选择了两种不同的发动机工况进行系统设计。通过动态模型对系统性能进行了预测，并与非设计状态下的净功率输出进行了比较。考虑了温度、压力和泵转速的限制。结果表明，在部分负荷条件下设计的系统具有较宽的运行范围，有利于在发动机工况变化时连续运行。在汽油机余热回收系统设计中，推荐采用由循环工况确定的工况。采用质量流量导向的操作策略可以获得最佳的性能。此外，如果系统是在部分条件下设计的，在公路燃油经济性试验循环中的平均油耗比原来降低了2.84%。这些初步结果为基于热力循环的发动机余热回收系统设计和优化提供了参考。(C)2017爱思唯尔有限公司。保留所有权利。
Waste heat recovery by means of a CO2 transcritical power cycle (CTPC) is suitable for dealing with high temperature heat sources and achieving miniaturization. Considering the variable operating conditions of engines, the object of current work is to reveal the influence of design condition selection on CTPC systems. Two different engine operating conditions are chosen for system design. System performance has been predicted by a dynamic model and compared by net power output at off-design conditions. Constraints on temperatures, pressures and pump rotational speed have been taken into account. The results show that system designed under a partial load condition possesses a broad range of operation which will be beneficial to operate continuously when engine condition varies. The operating condition determined by driving cycles is recommended for system design of waste heat recovery for gasoline engines. Optimal performance can be obtained by adopting the mass flow rate guided operation strategy. Moreover, the average fuel consumption reduction during the Highway Fuel Economy Test Cycle over the original is 2.84% if system is designed under a partial condition. These preliminary results give reference to system design and optimization for waste heat recovery of engines based on thermodynamic cycles. (C) 2017 Elsevier Ltd. All rights reserved.
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影响因子：
10.4
作者：
Chengyu Zhang;G. Shu;H. Tian;Haiqiao Wei;Xingyu Liang
通讯作者：
Chengyu Zhang;G. Shu;H. Tian;Haiqiao Wei;Xingyu Liang
影响因子：
10.4
作者：
Song, Jian;Gu, Chun-wei
通讯作者：
Gu, Chun-wei
DOI：
10.1021/i260019a023
发表时间：
1966-07
期刊：
Industrial & Engineering Chemistry Process Design and Development
影响因子：
--
作者：
J. C. Chen
通讯作者：
J. C. Chen
影响因子：
9
作者：
G. Shu;Mingru Zhao;H. Tian;Haiqiao Wei;Xingyu Liang;Yongzhan Huo;W. Zhu
通讯作者：
G. Shu;Mingru Zhao;H. Tian;Haiqiao Wei;Xingyu Liang;Yongzhan Huo;W. Zhu
影响因子：
11.2
作者：
H. Xie;Can Yang
通讯作者：
H. Xie;Can Yang