西华大学学报（自然科学版）2017，Vol.36Issue(3)：1-7,7.DOI:10.3969/j.issn.1673-159X.2017.03.001
EGR冷却器积碳研究综述
A Review of EGR Intercooler Soot Deposition
摘要
Abstract
The exhaust gas recirculation (EGR) is an effective method for reduction of NOx emission from diesel engine.Especially the cooled EGR can get better trade off among NOx,PM and brake specific fuel consumption (BSFC).Soot and HCs within the exhaust gas deposit onto the wall of heat exchanger when the exhaust gas flow through the intercooler and cooled down.The thermophoresis is the main mechanism of deposition,and diffusion,static charge and condensation are also affecting the deposition.The deposition in EGR intercoolers may causes the degradation in heat exchange efficiency on the order of 20％-30％,which may affect the NOx and PM emission.The deposition also increases the back pressure of the EGR intercooler and thus adversely affects the BSFC.The back pressure of fouled intercooler may be as twice as the back pressure of fresh intercooler.Temperature,soot diameter distribution and HCs concentration are main factors that affect the deposit formation process,and it is also affected by the structure,fuel and after treatment et al.Mitigation of the deposit can be achieved by controlling these factors that affect the deposit formation process.There is no effective method to remove the deposit of EGR intercooler because the deposit removal mechanisms is not fully understood.But here have some potential method for EGR intercooler regeneration based on results from some published literatures as follow:using high speed flow to blow out loose soot,HCs evaporation,soot burning,and cracking and/or flaking for water and acids condensation.关键词
EGR冷却器/积碳/换热效率/背压/再生Key words
EGR intercooler/soot deposit/heat exchange efficiency/back pressure/regeneration分类
能源科技引用本文复制引用
田维,张洵..EGR冷却器积碳研究综述[J].西华大学学报（自然科学版）,2017,36(3):1-7,7.基金项目
教育部春晖计划项目(Z2015083) （Z2015083）
流体及动力机械省部共建教育部重点实验室学术成果培育项目(SBZDPY-11-19) （SBZDPY-11-19）
省部级学科平台开放课题(SZJJ2014-0064). （SZJJ2014-0064）
