선박에 대한 이산화탄소배출 규제에 따른 각종 인자와 이산화탄소 흡수 설비의 EEDI 영향에 대한 고찰
- 선박에 대한 이산화탄소배출 규제에 따른 각종 인자와 이산화탄소 흡수 설비의 EEDI 영향에 대한 고찰
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- In the response of the international attentions to the global warming, IMO (International Maritime Organization) has been developing mandatory regulation throughout MEPC (Marine Environment Protection Committee) with specific index, EEDI (Energy Efficiency Design Index), to appraise CO2 emission performance of ships. Starting with Phase 0 from the day, 1 January, 2013, the regulation is already in effect and will be gradually reinforced throughout ‘Phase 1’ to ‘Phase 3’.
Meanwhile, it seems that new ships will not be able to satisfy the regulation only with the efforts from main engine makers. Especially, the grades, Phase 2 and Phase 3 requirealmost theoretical maximum of thermal efficiency. Accordingly, it needs to consider that what solutions in the present are being considered and how much advantages with the solutions will affect in EEDI.
Above all, specific reference values to evaluate the solutions is needed in the consideration that the results from EEDI have large distributions in each case. Thus, current conditions of the ships built in Korea have been reviewed and the results in EEDI are normally located between Phase 0 and Phase 2. With the results, Phase 0 is defined as the reference values to evaluate the solutions such as G-type engines application, hydrodynamical energy saving device, gas propulsion systems, shaft generators, WHRS and the combinations between themselves. The methods requires derating or chartering changes have not considered as the solutions.
In the result, EEDI can be reduced maximum 15 ~ 20% of Phase 0. If the effect of hydrodynamical energy saving devices is considered, the EEDI results could increase and might satisfy Phase 3. In the consideration that there are no specific indicators for hydrodynamical energy saving devices, this is not the time to think about the effects. Consequently, it needs to think of CCS for the merchant ships.
For CCS application for the merchant ships, most conventional model, aqueous MEA based model, has been considered by using Aspen Hysys. With the model, what additionally needs to apply CCS and how much utilities requires have been reviewed.
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