scholarly journals Analisa Pengaruh Penggunaan Bahan Bakar Diesel Like Fuel dan Minyak Solar Terhadap Unjuk Kerja Multi Swirl Combustion System (MSCS) Piston Chamber pada Small Marine Diesel Engine

2019 ◽  
Vol 9 (2) ◽  
pp. 402
Author(s):  
Edi Haryono
Keyword(s):  
Diesel Engine ◽  
Marine Diesel Engine ◽  
Combustion System ◽  
Swirl Combustion ◽  
Marine Diesel ◽  
Piston Chamber

Produksi minyak dunia diperkirakan telah mencapai puncaknya pada tahun 2000, ini berarti bahwa eksplorasi minyak bumi sudah maksimal dan selanjutnya akan mengalami penurunan. Ini akan menyebabkan dalam kurun waktu 20 tahun produksi minyak dunia akan kembali seperti pada tahun 1980-an(OPEC ,2009). Di lain pihak ketergantungan terhadap minyak bumi pada waktu yang sama akan terus meningkat akibat pertambahan penduduk dan kegiatan industri dan pembangunan. Akibat dari hal ini adalah harga energi yang semakin tinggi dan pasokan minyak yang menurun. Hal ini dapat dirasakan dari naiknya harga minyak mentah dan dicabutnya subsidi harga bahan bakar minyak oleh pemerintah Indonesia. Pada penelitian ini peneliti tertarik pada minyak solar dari oli bekas(Diesel – Like Fuel) di gunakan sebagai bahan bakar pada motor diesel dengan menggunakan Multi Swirl Combustion System (MSCS) Piston Chamber. Penelitian ini dilakukakan untuk mengetahui unjuk kerja dari motor diesel Multi Swirl Combustion System (MSCS) Piston Chamber saat menggunakan bahan bakar solar dari daur ulang minyak pelumas bekas(Diesel – Like Fuel) dan minyak solar(Pertamina Dex) sebagai pembanding. Metode yang digunakan dalam melakukan penelitian ini adalah metode eksperimental. Pengujian dilakukan dengan melakukan eksperimen pada variasi bahan bakar. Lalu akan dilakukan pengamatan terhadap unjuk kerja dari motor diesel yang digunakan untuk melakukan penelitian ini. Parameter unjuk kerja yang akan diamati adalah daya motordan BSFC. Dari hasil analisa terhadap daya motor diesel PE(Watt) penggunaan MSCS Piston Chamber pada beban 1000 Watt, 1500 Watt, dan 2000 Watt, nilai PE(Watt) pertamina dex lebih tinggi dari Diesel – Like Fuel/DLF sebesar rata – rata 9,86 %, 10,09 %, dan 10,32 %. Dari hasil analisa terhadap BSFC penggunaan MSCS Piston Chamber pada beban 1000 Watt, 1500 Watt, dan 2000 Watt, BSFC pertamina dex lebih rendah dari Diesel – Like Fuel/DLF sebesar rata – rata 6,36 %, 8,98 % dan 13,26 %. Dapat ditarik kesimpulan berdasarkan BSFC dan daya motor(PE) penggunaan bahan bakar minyak solar(Pertamina Dex) lebih ekonomis dibandingkan dengan minyak solar dari oli bekas(Diesel – Like Fuel)

EMISSION CHARACTERISTICS OF DOUBLE SWIRL COMBUSTION SYSTEM FOR A DIESEL ENGINE

2016 ◽  
Vol 15 (7) ◽  
pp. 1611-1616
Author(s):  
Xiangrong Li ◽  
Liwang Su ◽  
Haobu Gao ◽  
Luming Zhao ◽  
Fushui Liu
Keyword(s):  
Diesel Engine ◽  
Emission Characteristics ◽  
Combustion System ◽  
Swirl Combustion

Selection of a Waste Heat Recovery System for a Marine Diesel Engine Based on Exergy Analysis

2016 ◽  
Vol 25 ◽  
pp. 36-51
Author(s):  
Salman Abdu ◽  
Song Zhou ◽  
Malachy Orji
Keyword(s):  
Diesel Engine ◽  
Heat Recovery ◽  
Waste Heat Recovery ◽  
Waste Heat ◽  
Marine Diesel Engine ◽  
Exergetic Efficiency ◽  
Waste Heat Recovery System ◽  
Recovery System ◽  
Heat Recovery System ◽  
Marine Diesel

Highly increased fuel prices and the need for greenhouse emissions reduction from diesel engines used in marine engines in compliance with International Maritime Organization (IMO) on the strict regulations and guidelines for the Energy Efficiency Design Index (EEDI) make diesel engine exhaust gas heat recovery technologies attractive. The recovery and utilization of waste heat not only conserves fuel, but also reduces the amount of waste heat and greenhouse gases dumped to the environment .The present paper deals with the use of exergy as an efficient tool to measure the quantity and quality of energy extracted from waste heat exhaust gases in a marine diesel engine. This analysis is utilized to identify the sources of losses in useful energy within the components of the system for three different configurations of waste heat recovery system considered. The second law efficiency and the exergy destroyed of the components are investigated to show the performance of the system in order to select the most efficient waste heat recovery system. The effects of ambient temperature are also investigated in order to see how the system performance changes with the change of ambient temperature. The results of the analysis show that in all of the three different cases the boiler is the main source of exergy destruction and the site of dominant irreversibility in the whole system it accounts alone for (31-52%) of losses in the system followed by steam turbine and gas turbine each accounting for 13.5-27.5% and 5.5-15% respectively. Case 1 waste heat recovery system has the highest exergetic efficiency and case 3 has the least exergetic efficiency.

Stress Distribution Analysis on Alloy Layer of High Power Marine Diesel Engine Bearing Bush

2013 ◽  
Vol 331 ◽  
pp. 148-152
Author(s):  
Xiu Xu Zhao ◽  
Zhi Xiang Hu ◽  
An Jian Huang
Keyword(s):  
Diesel Engine ◽  
High Power ◽  
Alloy Layer ◽  
Marine Diesel Engine ◽  
Oil Film ◽  
Marine Diesel ◽  
Bearing Alloy ◽  
Stress And Strain Distribution ◽  
Engine Bearing ◽  
Oil Film Pressure

According to the characteristics of large size, small clearance ratio, high oil film pressure and thin oil film thickness in the actual conditions of high power marine diesel engine bearing, this Paper analyzes oil film pressure distribution on inner surface of bearing bush based on the finite difference method, uses finite element method to establish the hierarchical model, and analyzes stress and strain distribution on bearing alloy. In addition, this Paper researches the changes of stress and strain distribution on bearing alloy layer when alloy layer thickness changes for the optimization design of high power marine diesel engine bearing bush.

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