Environmental and economical benefits of changing from marine diesel oil to natural-gas fuel for short-voyage high-power passenger ships

2009 ◽  
Vol 224 (2) ◽  
pp. 103-113 ◽  
Author(s):  
A A Banawan ◽  
M M El Gohary ◽  
I S Sadek
Keyword(s):  
Natural Gas ◽  
High Power ◽  
Diesel Oil ◽  
Passenger Ships ◽  
Marine Diesel ◽  
Gas Fuel

The Potential of Methanol as an Alternative Marine Fuel for Indonesian Domestic Shipping

2020 ◽  
Vol 162 (A2) ◽  
Author(s):  
E M Priyanto ◽  
A I OlÇer ◽  
D Dalaklis ◽  
F Ballini
Keyword(s):  
Diesel Oil ◽  
Marine Fuel ◽  
Ship Owner ◽  
Passenger Ships ◽  
Marine Diesel ◽  
Pilot Fuel ◽  
Scenario Model ◽  
The Government ◽  
Set Up

This analysis aims to provide insight and to explore the future usage of methanol as an alternative marine fuel for domestic ships in Indonesia. An overview of potential application, analysis of resources availability, and stakeholder readiness on the topic are provided; related challenges are also identified and further examined. The potential performance of methanol as a fuel is discussed and evaluated via two different perspectives (the ship-owner perspective and the government one) through case studies of two passenger ships owned by the shipping company Pelayaran Indonesia (PELNI): MV. Labobar and MV. Gunung Dempo. As ship-owners tend to look very closely at the economic aspects, a feasibility study is performed by developing a combinatorial scenario approach based on the combination of economic measures of merit (NPV and payback period) along with a technical scenario (main-pilot fuel set-up); the variables included in the calculation are: ship age, ship productivity, and macro-economy conditions. Regarding the government perspective, the main issues are environmental protection and policy compliance. These issues are evaluated by examining six emission types (NOx, SOx, CO2, CH4, N2O, and PM). Additionally, since there is a trade-off situation in government subsidies between the government and ship-owner interests, an optimisation and sensitivity analysis is performed by utilizing a combinatorial scenario model to determine optimum methanol price and external variables influencing the decision to support further use of methanol in the Indonesian market. An important finding was that Indonesia has certain advantages/drives to introduce methanol as a marine fuel. However, methanol competitiveness is mainly dependent on ship productivity and the price difference between methanol and marine diesel oil (MDO). Additionally, policy analysis (through an optimisation approach) could be one of the government options in order to determine the optimum condition in establishing methanol as a marine fuel. Finally, short, medium, and long term recommendations are also provided as the basis for future consideration.

THE POTENTIAL OF METHANOL AS AN ALTERNATIVE MARINE FUEL FOR INDONESIAN DOMESTIC SHIPPING

2021 ◽  
Vol 162 (A2) ◽  
Author(s):  
E M Priyanto ◽  
A I Ölçer ◽  
D Dalaklis ◽  
F Ballini
Keyword(s):  
Diesel Oil ◽  
Marine Fuel ◽  
Ship Owner ◽  
Passenger Ships ◽  
Marine Diesel ◽  
Pilot Fuel ◽  
Scenario Model ◽  
The Government ◽  
Set Up

This analysis aims to provide insight and to explore the future usage of methanol as an alternative marine fuel for domestic ships in Indonesia. An overview of potential application, analysis of resources availability, and stakeholder readiness on the topic are provided; related challenges are also identified and further examined. The potential performance of methanol as a fuel is discussed and evaluated via two different perspectives (the ship-owner perspective and the government one) through case studies of two passenger ships owned by the shipping company Pelayaran Indonesia (PELNI): MV. Labobar and MV. Gunung Dempo. As ship-owners tend to look very closely at the economic aspects, a feasibility study is performed by developing a combinatorial scenario approach based on the combination of economic measures of merit (NPV and payback period) along with a technical scenario (main-pilot fuel set-up); the variables included in the calculation are: ship age, ship productivity, and macro-economy conditions. Regarding the government perspective, the main issues are environmental protection and policy compliance. These issues are evaluated by examining six emission types (NOx, SOx, CO2, CH4, N2O, and PM). Additionally, since there is a trade-off situation in government subsidies between the government and ship-owner interests, an optimisation and sensitivity analysis is performed by utilizing a combinatorial scenario model to determine optimum methanol price and external variables influencing the decision to support further use of methanol in the Indonesian market. An important finding was that Indonesia has certain advantages/drives to introduce methanol as a marine fuel. However, methanol competitiveness is mainly dependent on ship productivity and the price difference between methanol and marine diesel oil (MDO). Additionally, policy analysis (through an optimisation approach) could be one of the government options in order to determine the optimum condition in establishing methanol as a marine fuel. Finally, short, medium, and long term recommendations are also provided as the basis for future consideration.

scholarly journals Examining Methanol as an Alternative Marine Fuel for Indonesian Domestic Ships

2019 ◽  
Author(s):  
E. M. Priyanto ◽  
A. I. Olcer ◽  
F Ballini
Keyword(s):  
Diesel Oil ◽  
Optimization Approach ◽  
Marine Fuel ◽  
Ship Owner ◽  
Passenger Ships ◽  
Marine Diesel ◽  
Pilot Fuel ◽  
The Government ◽  
Set Up ◽  
Price Differences

The analysis in hand aims to provide insight and to explore the future usage of methanol as an alternative marine fuel for domestic ships in Indonesia. An overview of potential application, analysis of resources availability, and stakeholder readiness/overall views on the topic are provided; related challenges are also identified and further examined. The potential performance of methanol as a fuel is discussed and evaluated via two different perspectives (the ship-owner perspective and the government one), through case studies of two passenger ships owned by the shipping company Pelayaran Indonesia (PELNI): MV. Labobar and MV. Gunung Dempo. As ship-owners tend to look very closely at the economic aspects, a feasibility study is performed by developing a combinatorial scenario approach based on the combination of economic measures of merit (NPV and payback period) along with a technical scenario (main-pilot fuel set up); a few of the variables included in the calculation are: ship age, ship productivity, and macro-economy conditions. Regarding the government perspective, the issues of environmental protection and policy compliance are evaluated by examining six emission types (NOx, SOx, CO2, CH4, N2O, and PM). Additionally, since there is a trade-off situation in government subsidies between the government and ship-owner interests, an optimization and sensitivity analysis is performed by utilizing a combinatorial scenario model to determine optimum methanol price and external variables influencing the decision to support further use of methanol in the Indonesian market. An important finding was that Indonesia has certain advantages/drivers to introduce methanol as marine fuel. However, methanol competitiveness is mainly dependent on ship productivity and the price differences between methanol and marine diesel oil (MDO). Additionally, policy analysis (through an optimization approach) could be one of the government options in order to determine the optimum condition in establishing methanol as marine fuel. Finally, short, medium, and long term recommendations are also provided as the basis for future consideration.

Fuel Flexibility Influences on Premixed Combustor Blowout, Flashback, Autoignition and Instability

2006 ◽  
Author(s):  
Tim Lieuwen ◽  
Vince McDonell ◽  
Eric Petersen ◽  
Domenic Santavicca
Keyword(s):  
Natural Gas ◽  
Gas Turbine ◽  
Dynamic Stability ◽  
Current Understanding ◽  
Fuel Composition ◽  
Fuel Flexibility ◽  
Lean Premixed ◽  
Gas Fuel ◽  
The Impact ◽  
Underlying Processes

This paper addresses the impact of fuel composition on the operability of lean premixed gas turbine combustors. This is an issue of current importance due to variability in the composition of natural gas fuel supplies and interest in the use of syngas fuels. Of particular concern is the effect of fuel composition on combustor blowout, flashback, dynamic stability, and autoignition. This paper reviews available results and current understanding of the effects of fuel composition on the operability of lean premixed combustors. It summarizes the underlying processes that must be considered when evaluating how a given combustor’s operability will be affected as fuel composition is varied.

scholarly journals Numerical and Experimental Investigation of Combustion and Knock in a Dual Fuel Gas/Diesel Compression Ignition Engine

2012 ◽  
Vol 2012 ◽  
pp. 1-10 ◽  
Author(s):  
A. Gharehghani ◽  
S. M. Mirsalim ◽  
S. A. Jazayeri
Keyword(s):  
Natural Gas ◽  
Diesel Oil ◽  
Combustion Characteristic ◽  
Simultaneous Increase ◽  
Dual Fuel ◽  
Compression Ignition ◽  
Swirl Ratio ◽  
Characteristic Analysis ◽  
Mode Of Operation ◽  
Intake Pressure

Conventional compression ignition engines can easily be converted to a dual fuel mode of operation using natural gas as main fuel and diesel oil injection as pilot to initiate the combustion. At the same time, it is possible to increase the output power by increasing the diesel oil percentage. A detailed performance and combustion characteristic analysis of a heavy duty diesel engine has been studied in dual fuel mode of operation where natural gas is used as the main fuel and diesel oil as pilot. The influence of intake pressure and temperature on knock occurrence and the effects of initial swirl ratio on heat release rate, temperature-pressure and emission levels have been investigated in this study. It is shown that an increase in the initial swirl ratio lengthens the delay period for auto-ignition and extends the combustion period while it reduces NOx. There is an optimum value of the initial swirl ratio for a certain mixture intake temperature and pressure conditions that can achieve high thermal efficiency and low NOxemissions while decreases the tendency to knock. Simultaneous increase of intake pressure and initial swirl ratio could be the solution to power loss and knock in dual fuel engine.

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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