Experimental study on influence of high exhaust backpressure on diesel engine performance via energy and exergy analysis

被引：14

作者：

Ma, Zetai ^{[1
]}

Zhang, Kun ^{[2
]}

Xiang, Hanchun ^{[1
]}

Gu, Jie ^{[1
]}

Yang, Mingyang ^{[1
]}

Deng, Kangyao ^{[1
]}

机构：

[1] Shanghai Jiao Tong Univ, Shanghai 200240, Peoples R China

[2] Shanghai Marine Equipment Res Inst, Shanghai 200031, Peoples R China

来源：

ENERGY | 2023年 / 263卷

基金：

中国国家自然科学基金;

关键词：

Turbocharged diesel engine; High backpressure; Energy and exergy analysis; Experimental investigation; BACK PRESSURE; STRATEGIES;

D O I：

10.1016/j.energy.2022.125788

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Marine diesel engines can be exposed to high backpressure conditions, because various aftertreatment systems and waste heat recovery devices have been widely applied to reduce the emission level, and the outlet of its exhaust manifold is normally below sea level. This article aims to understand the influence of exhaust back -pressure on turbocharged engine performance. Diesel engine tests under high backpressure was conducted and it has been found that engine output power drops sharply. To explore the reasons and further study the recovery method, analysis of energy and exergy was carried out. With the increase of backpressure, turbo expansion ratio reduces sharply. But the energy upstream turbine doesn't decrease necessary due to the increase of exhaust temperature. Simultaneously, the exhaust exergy gradually increases by 10.3% when the backpressure increases from 0 bar to 0.55 bar at 75% load, leading to improved energy grade. The turbine output power reduces 56.7% because of the combination results of reduced expansion ratio and increased exhaust energy grade. The method of power recovery should balance these two factors. The study can enlighten the method of power recovery of diesel engine confronted by high backpressure conditions.

引用

页数：14

共 30 条

[1]

Brunt M., 1999, SAE Tech Pap, DOI DOI 10.4271/1999-01-0187

[2]

Brunt MFJ, 1998, SAE Trans, P1596

[3] The effects of exhaust back pressure on conventional and low-temperature diesel combustion [J].

Cong, S. ;

Garner, C. P. ;

McTaggart-Cowan, G. P. .

PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART D-JOURNAL OF AUTOMOBILE ENGINEERING, 2011, 225 (D2) :222-235

[4]

Cong S, 2009, SAE Technical Paper. (No. 2009-01-1961

[5] Energy and exergy analysis on gasoline engine based on mapping characteristics experiment [J].

Fu, Jianqin ;

Liu, Jingping ;

Feng, Renhua ;

Yang, Yanping ;

Wang, Linjun ;

Wang, Yong .

APPLIED ENERGY, 2013, 102 :622-630

[6] A comparative study on the first and second law analysis and performance characteristics of a spark ignition engine using either natural gas or gasoline [J].

Gharehghani, A. ;

Hosseini, R. ;

Mirsalim, M. ;

Yusaf, Talal F. .

FUEL, 2015, 158 :488-493

[7] Experimental investigation of thermal balance of a turbocharged SI engine operating on natural gas [J].

Gharehghani, A. ;

Koochak, M. ;

Mirsalim, M. ;

Yusaf, Talal .

APPLIED THERMAL ENGINEERING, 2013, 60 (1-2) :200-207

[8] Thermoelectric performance optimization when considering engine power loss caused by back pressure applied to engine exhaust waste heat recovery [J].

He, Wei ;

Wang, Shixue .

ENERGY, 2017, 133 :584-592

[9]

Herrmann R, 2001, ASME 2001 INTERNAL C

[10]

Heywood JB, 2018, INTERNAL COMBUSTION, V2nd

← 1 2 3 →