Effects of gas flow on particulate deposition in EGR coolers

• Published in: Journal of mechanical science and technology Vol. 36; no. 1; pp. 491 - 497
• Main Authors: Zhang, Xun, Li, Jihui, Han, Zhiqiang, Wu, Xunshun, Tian, Wei
• Format: Journal Article
• Language: English
• Published: Seoul Korean Society of Mechanical Engineers 2022; Springer Nature B.V; 대한기계학회
• Subjects: Control; Coolers; Deposition; Diesel engines; Dynamical Systems; Engineering; Exhaust gases; Flow velocity; Gas flow; Gas temperature; Heat exchanger tubes; Industrial and Production Engineering; Mechanical Engineering; Original Article; Vibration; 기계공학; Particulate deposition; Gas velocity; Gas flow rate; EGR cooler fouling
• ISSN: 1738-494X; 1976-3824
• DOI: 10.1007/s12206-021-1246-0

This paper presents the test approach to investigate the effects of gas flow rate on particulate deposition inside the exhaust gas recirculation (EGR) coolers. The tests were carried out on a diesel engine equipped with the EGR cooler that a given total gas flow rate passed through and that contained pluggable exchanger tubes to adjust the flow rate in the tubes. Test results show that under the given coolant temperature and EGR gas temperature, the lower flow rate in the exchanger tube is and the longer tubes are, the more particulate with D p > 50 nm deposit in the cooler. With the given total gas flow rate passing through the cooler, the lower flow rate in the exchanger tube is and the longer tubes are, the larger deposit mass is inside the cooler. In the cases of longer tubes, the effects of gas flow rate on the deposit mass are depends on the effects of gas velocity on the particulate deposition, rather than the effects of flow rate on the particulate number passing through the heat exchanger tube per minute.