Nader R. Ammar

A comparison between fuel cells and other alternatives for marine electric power generation

ABSTRACT The world is facing a challenge in meeting its needs for energy. Global energy consumption in the last halfcentury has increased very rapidly and is expected to continue to grow over the next 50 years. However, it is expected to see significant differences between the last 50 years and the next. This paper aims at introducing a good solution to replace or work with conventional marine power plants. This includes the use of fuel cell power plant operated with hydrogen produced through water electrolysis or hydrogen produced from natural gas, gasoline, or diesel fuels through steam reforming processes to mitigate air pollution from ships.

Energy- and cost-efficiency analysis of greenhouse gas emission reduction using slow steaming of ships: case study RO-RO cargo vessel

ABSTRACT The International Maritime Organization introduced two energy efficiency indexes to reduce greenhouse gas emissions from ships. One of the short-run solutions is to reduce ship speed. The present research calculates the cost-effectiveness of reducing CO2 emissions and the improved Energy Efficiency Design Index (EEDI) corresponded to the reduced Energy Efficiency Operational Indicator (EEOI) due to slow steaming. As a case study, RO-RO cargo vessel has been investigated. Reducing ship speed by 10% and 40% will reduce CO2 emission by 27.05% and 78.39% with cost-effectiveness of 121.2

Steam and partial oxidation reforming options for hydrogen production from fossil fuels for PEM fuel cells

/ton CO2 and 287.6

Thermodynamic analysis of a combined gas turbine power plant with a solid oxide fuel cell for marine applications

/ton CO2, respectively. The attained EEDI values will be improved by 2.04% and 35.81% with the reduced EEOI values by 8.76% and 70.65%, respectively. Although ship slow steaming by 40% would comply with the required EEDI for the first and the second phases, the complied EEDI value needs to be further reduced by 7% in the year 2025.