Experimental evaluation of the significance of scheduled turbocharger reconditioning on marine diesel engine efficiency and exhaust gas emissions

IF 6 2区工程技术 Q1 ENGINEERING, MULTIDISCIPLINARY

Ain Shams Engineering Journal Pub Date : 2024-05-04 DOI:10.1016/j.asej.2024.102845

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Abstract

Poor clearances, misalignments, and carbon deposits in a turbocharger due to high running hours can decrease engine efficiency. This study analyzes the effects of turbocharger reconditioning on the performance and emissions formation of a marine diesel generator engine. The engine test experiments were performed on a university training ship's auxiliary diesel engine with 4309 running hours before and after the TC overhaul. As a result, cylinder peak pressure was increased by a maximum of 3.57 % while fuel saving of 5–8 g/kWh was realized. Lower exhaust gas temperatures and improved charge air pressure by up to 7.7 % were recorded. A significant CO emission reduction of 21.6 % was recorded at idle load whereas NOx and CO₂ emissions were reduced to a maximum of 4.86 % and 7.30 % at 50 % engine load. The results indicate that scheduled TC overhaul and maintenance are very useful to improve the engine’s fuel economy, and performance and reduce exhaust emissions.

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涡轮增压器定期翻新对船用柴油机效率和废气排放影响的实验评估

涡轮增压器中的间隙不良、不对中以及由于高运行时间造成的积炭会降低发动机的效率。本研究分析了涡轮增压器翻新对船用柴油发电机发动机性能和排放形成的影响。发动机测试实验是在一艘大学训练舰的辅助柴油发动机上进行的，涡轮增压器大修前后的运行时间均为 4309 小时。结果，气缸峰值压力最大提高了 3.57%，同时节省了 5-8 克/千瓦时的燃油。废气温度降低，增压空气压力提高了 7.7%。怠速时的一氧化碳排放量大幅减少了 21.6%，而在发动机负荷为 50% 时，氮氧化物和二氧化碳排放量最大分别减少了 4.86% 和 7.30%。结果表明，定期的 TC 大修和维护对提高发动机的燃油经济性和性能以及减少废气排放非常有用。

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来源期刊

Ain Shams Engineering Journal Engineering-General Engineering

CiteScore

10.80

自引率

13.30%

发文量

441

审稿时长

49 weeks

期刊介绍： in Shams Engineering Journal is an international journal devoted to publication of peer reviewed original high-quality research papers and review papers in both traditional topics and those of emerging science and technology. Areas of both theoretical and fundamental interest as well as those concerning industrial applications, emerging instrumental techniques and those which have some practical application to an aspect of human endeavor, such as the preservation of the environment, health, waste disposal are welcome. The overall focus is on original and rigorous scientific research results which have generic significance. Ain Shams Engineering Journal focuses upon aspects of mechanical engineering, electrical engineering, civil engineering, chemical engineering, petroleum engineering, environmental engineering, architectural and urban planning engineering. Papers in which knowledge from other disciplines is integrated with engineering are especially welcome like nanotechnology, material sciences, and computational methods as well as applied basic sciences: engineering mathematics, physics and chemistry.