한국해양공학회지 (Journal of Ocean Engineering and Technology)

  • 제37권2호
  • /
  • Pages.58-67
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  • 2023
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  • 1225-0767(pISSN)
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  • 2287-6715(eISSN)
한국해양공학회 (Korean Society of Ocean Engineers)
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Investigation of Applying Technical Measures for Improving Energy Efficiency Design Index (EEDI) for KCS and KVLCC2

  • Jun-Yup Park (Department of Naval Architecture and Ocean Engineering, Seoul National University) ;
  • Jong-Yeon Jung (Department of Naval Architecture and Ocean Engineering, Seoul National University) ;
  • Yu-Taek Seo (Department of Naval Architecture and Ocean Engineering, Seoul National University)
  • 투고 : 2023.01.09
  • 심사 : 2023.03.28
  • 발행 : 2023.04.30
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초록

While extensive research is being conducted to reduce greenhouse gases in industrial fields, the International Maritime Organization (IMO) has implemented regulations to actively reduce CO2 emissions from ships, such as energy efficiency design index (EEDI), energy efficiency existing ship index (EEXI), energy efficiency operational indicator (EEOI), and carbon intensity indicator (CII). These regulations play an important role for the design and operation of ships. However, the calculation of the index and indicator might be complex depending on the types and size of the ship. Here, to calculate the EEDI of two target vessels, first, the ships were set as Deadweight (DWT) 50K container and 300K very large crude-oil carrier (VLCC) considering the type and size of those ships along with the engine types and power. Equations and parameters from the marine pollution treaty (MARPOL) Annex VI, IMO marine environment protection committee (MEPC) resolution were used to estimate the EEDI and their changes. Technical measures were subsequently applied to satisfy the IMO regulations, such as reducing speed, energy saving devices (ESD), and onboard CO2 capture system. Process simulation model using Aspen Plus v10 was developed for the onboard CO2 capture system. The obtained results suggested that the fuel change from Marine diesel oil (MDO) to liquefied natural gas (LNG) was the most effective way to reduce EEDI, considering the limited supply of the alternative clean fuels. Decreasing ship speed was the next effective option to meet the regulation until Phase 4. In case of container, the attained EEDI while converting fuel from Diesel oil (DO) to LNG was reduced by 27.35%. With speed reduction, the EEDI was improved by 21.76% of the EEDI based on DO. Pertaining to VLCC, 27.31% and 22.10% improvements were observed, which were comparable to those for the container. However, for both vessels, additional measure is required to meet Phase 5, demanding the reduction of 70%. Therefore, onboard CO2 capture system was designed for both KCS (Korea Research Institute of Ships & Ocean Engineering (KRISO) container ship) and KVLCC2 (KRISO VLCC) to meet the Phase 5 standard in the process simulation. The absorber column was designed with a diameter of 1.2-3.5 m and height of 11.3 m. The stripper column was 0.6-1.5 m in diameter and 8.8-9.6 m in height. The obtained results suggested that a combination of ESD, speed reduction, and fuel change was effective for reducing the EEDI; and onboard CO2 capture system may be required for Phase 5.

키워드

과제정보

This work received no sepcific grant from any funding agency in the public, commercial, or not-for-profit sectors.

참고문헌

  1. Choi, J. S., & Rho, B. S. (2011). A Study on the Energy Efficiency Operational Indicator for CO2 Reduction from Ships. Journal of Advanced Marine Engineering and Technology, 35(8), 1035-1040. https://doi.org/10.5916/jkosme.2011.35.8.1035
  2. Diamantonis, N. I., Boulougouris, G. C., Mansoor, E., Tsangaris, D. M., & Economou, I. G. (2013). Evaluation of cubic, SAFT, and PC-SAFT equations of state for the vapor-liquid equilibrium modeling of CO2 mixtures with other gases. Industrial & Engineering Chemistry Research 2013, 52(10), 3933-3942. https://doi.org/10.1021/ie303248q
  3. Gross, J., & Sadowski, G. (2001). Perturbed-Chain SAFT:  An equation of state based on perturbation theory for chain molecules. Industrial & Engineering Chemistry Research 2001, 40(4), 1244-1260. https://doi.org/10.1021/ie0003887
  4. International Maritime Organization (IMO). (2022). Reduction of GHG emissions from ships; Proposal for including carbon capture technologies in the IMO regulatory framework to reduce GHG emissions from ships. MEPC 79/7/4.
  5. International Maritime Organization. (2011). Amendments to the ANNEX of the protocol of 1997 to amend the international convention for the prevention of pollution from ships, 1973, as modified by the protocol of 1978 relating thereto (Resolution MEPC.203(62)).
  6. International Maritime Organization. (2014). 2014 Guidelines on the method of calculation of the attained Energy Efficiency Design Index(EEDI) for new ships (Resolution MEPC.245(66)).
  7. International Maritime Organization. (2018). 2018 Guidelines on the method of calculation of the attained Energy Efficiency Design Index(EEDI) for new ships (Resolution MEPC.308(73)).
  8. International Maritime Organization. (2020).Amendments to the ANNEX of the protocol of 1997 to amend the international convention for the prevention of pollution from ships, 1973, as modified by the protocol of 1978 relating thereto (Resolution MEPC.324(75)).
  9. Jung, J. Y., & Seo, Y. T. (2022). Onboard CO2 capture process design using rigorous rate-based model. Journal of Ocean Engineering and Technology, 36(3), 168-180. https://doi.org/10.26748/KSOE.2022.006
  10. Jung, K H. (2014). Study of various effects and CO2 absorption on EEDI (Energy efficiency design index) in merchant ships [Master's Thesis, Pohang University of Science and Technology]. https://postech-primo.hosted.exlibrisgroup.com/permalink/f/qubcit/82POSTECH_INST2190081700003286
  11. Kim, J. H., Choi, J. E., Choi, B. J., Chung, S. H., & Seo, H. W. (2015). Development of energy-saving devices for a full slow-speed ship through improving propulsion performance. International Journal of Naval Architecture and Ocean Engineering, 7(2), 390-398. https://doi.org/10.1515/ijnaoe-2015-0027
  12. Korea Institute of Ocean Science & Technology (KIOST). (2016). 에너지 절감을 위한 선박 저항감소 및 추진성능 향상 핵심기술 개발[Development of core technologies for reducing ship resistance and improving propulsion performance for energy saving]. https://scienceon.kisti.re.kr/srch/selectPORSrchReport.do?cn=TRKO201800039492
  13. MAN Energy Solutions. (2019). Marine engine programme 2018 (2nd ed.).
  14. Park, G., & Cho, K. (2017). A study on the change of EEOI before and after modifying bulbous at the large container ship adopting low speed operation. Journal of Advanced Marine Engineering and Technology, 41(1), 15-20. https://doi.org/10.5916/jkosme.2017.41.1.15
  15. Shin, H. J., Lee, K. H., Han, M. R., Lee, C. Y., & Shin, S. C. (2013). Pre-swirl duct of fuel oil saving device design and analysis for ship. Journal of the Society of Naval Architects of Korea, 50(3), 145-152. https://doi.org/10.3744/SNAK.2013.50.3.145
  16. Song, H. J., Kim, M. C., Lee, W. J., Lee, K. W., & Kim, J. H. (2015). Development of the new energy saving device for the reduction of fuel of 176k bulk carrier. Journal of the Society of Naval Architects of Korea, 52(6), 419-427. https://doi.org/10.3744/SNAK.2015.52.6.419