Research on the performance degradation and failure mechanism of exhaust Systems for explosion proof diesel engines in different mining applications
Year: 2026
Type: article
Abstract: Mine explosion-proof diesel engines are critical for underground coal mining, yet the long-term performance degradation of their exhaust systems poses substantial risks to operational safety and environmental compliance-a gap not addressed in short-term performance-focused studies. This study investigates the degradation and failure mechanisms of dry, wet, and combined exhaust systems under simulated mining conditions using a JHP4105DZDFB-G engine. Experimental results show that the wet system exhibits the fastest degradation, with exhaust backpressure increasing by 15.2% within 500 hours of continuous operation under simulated mining conditions due to sludge accumulation, leading to a 12-15% power loss. In contrast, the dry system maintains lower emissions (NOₓ, HC, CO, and PM were reduced by 68.36%, 71.71%, 55.39%, and 82.28% compared to the wet system) but suffers thermal fatigue in condensers after 1000 hours. The combined system shows hybrid failures, with PM emissions exceeding regulatory limits (0.4 g/kWh) at 300 hours. Mechanistic analysis reveals that wet systems fail primarily due to mechanical blockage and corrosion, while dry systems succumb to thermal-mechanical fatigue. A multivariable regression model and machine-learning algorithms are developed to predict degradation thresholds, enabling proactive maintenance. Thermal management optimization for dry systems is proposed.
Source: PLoS ONE
Authors: Zhiyuan Shi, Haitao Feng, Chong Chen, Yuegang Nie
Institution: Qingdao University of Technology
Language: English
Topic: Engine and Fuel Emissions
Subfield: Automotive Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,382
Award: G3432046881
OpenAlex ID: W7127982959