Techno–Economic and Risk Evaluation of Combined Cycle Propulsion Systems in Large Container Ships

Abstract

Owing to the stringent regulations on pollutant emissions that are imposed by the International Maritime Organization and increasing fuel prices, there has been significant research on developing cleaner fuels and novel propulsion systems. This study presents a techno-economical and risk assessment method for evaluating alternative propulsion technologies and cleaner fuels as substitutes for heavy fuel oil and two-stroke diesel engines in marine transportation. This analysis was carried out for two different journeys. Accordingly, we evaluated the economic benefits of using an enhanced intercooler/reheat combined gas and steam cycle or simple and intercooler/reheat combined gas and steam cycles that were fueled by marine diesel oil or liquified natural gas instead of a two-stroke diesel engine that was fueled by MDO as the propulsion system in a large container ship, considering different shipping routes. The results highlighted the advantages of implementing the simple, intercooler/reheat, and enhanced combined gas and steam cycles as propulsion systems. A sensitivity analysis was performed to investigate the effects of the fuel cost, capital cost, and hull fouling resistance on the economic analysis. For the routes that were considered herein, compared to a two-stroke diesel engine that was fueled by MDO, the simple, intercooler/reheat, and enhanced gas and steam combined cycles that were fueled by LNG increased the net present value by 78.3%, 78.5%, and 76.4%, respectively, and reduced the payback period by 38.8%, 38.9%, and 35%, respectively. Furthermore, the fuel and capital costs had a significant influence on the overall economic profit.

TERA of Gas Turbine Propulsion Systems for RORO Ships

“…The gas turbine was assumed to operate on natural gas and hydrogen, whereas the diesel engine was assumed to run on marine diesel oil. To estimate the emissions of CO 2 and NO x from the diesel engine, we referred to publicly available data and determined that the range of emissions was between 560 and 620 g/kW•h and 8 and 10 g/kW•h, respectively [12,[15][16][17][18]. The gas turbine chosen for the research used a low-NO x combustor that produced low NO x emissions, comparable with those of natural-gas-powered land-based gas turbines [36][37][38][39][40].…”

“…Alzayedi [10,17,18] examined a combined cycle fuelled by LNG and marine diesel oil for a large container ship instead of a two-stroke diesel engine. Using numerical software and a TERA approach, the results indicated that LNG was a promising alternative fuel for the marine sector.…”

Construction mode optimal selection method for intelligent sensing system in zero‐carbon parks

“…Using techno-economic evaluation, Wang et al [17] matched different enterprises with feasible and typical integrated energy technologies. Li et al [18] and Alzayedi et al [19] verified the feasibility of the proposed new scenarios and systems, respectively. Based on the application of engineering economic evaluation in engineering projects, Wu [20] further established a related intelligent decision-making system.…”

“…[18] and Alzayedi et al. [19] verified the feasibility of the proposed new scenarios and systems, respectively. Based on the application of engineering economic evaluation in engineering projects, Wu [20] further established a related intelligent decision‐making system.…”