期刊
ENERGY
卷 140, 期 -, 页码 488-505出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.energy.2017.08.094
关键词
Pre-turbine steam injection; Miller cycle; Waste heat recovery; Matching strategy; Turbocharged engine
资金
- National Pre-Research Project during the 12th Five-Year Plan Period [62201020203]
The pre-turbine steam injection and the Miller cycle can be combined together to improve engine performances, but matching strategies of those two approaches under different operating conditions still need to be clarified. In this paper, thermodynamic processes of the pre-turbine steam injection and the Miller cycle are studied first followed by matching strategies based on a non-dimensional matching map. Experiments are also conducted to show merits of this new system applied on a turbocharged diesel engine. The results show that the steam mass flow rate has a much bigger effect on air supplying characteristics of the turbocharger than the steam temperature, while the Miller cycle degree shows a big influence on the air consuming characteristics of the engine. With the steam/exhaust gas mass flow ratio of 0.1, the fuel economy under full load conditions can be improved by up to 5.9% at 1500 rpm. At the rated speed of 2100 rpm, the fuel economy deteriorates by 1.3% with the steam injection but can be improved by 2.8% further combined with the Miller cycle. Thus, different matching strategies of those two approaches should be adopted under different engine conditions. (C) 2017 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据