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Technical Papers

NOx emission calculations for bulk carriers by using engine power probabilities as weighting factors

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Pages 1146-1157 | Received 28 Apr 2017, Accepted 13 Jul 2017, Published online: 05 Sep 2017

Figures & data

Figure 1. Three tiers of NOx emission limits.

Figure 1. Three tiers of NOx emission limits.

Table 1. Particulars of four types of BCs.

Figure 2. NOx EFs and WFs of two-stroke ME at different load levels.

Figure 2. NOx EFs and WFs of two-stroke ME at different load levels.

Figure 3. NOx EFs and WFs of four-stroke GE at different load levels.

Figure 3. NOx EFs and WFs of four-stroke GE at different load levels.

Figure 4. SFOC of the two-stroke ME at different load levels.

Figure 4. SFOC of the two-stroke ME at different load levels.

Figure 5. SFOC of the four-stroke GE at different load levels.

Figure 5. SFOC of the four-stroke GE at different load levels.

Figure 6. Accumulated power probability of BC1 ME.

Figure 6. Accumulated power probability of BC1 ME.

Figure 7. Accumulated power probability of BC2 ME.

Figure 7. Accumulated power probability of BC2 ME.

Figure 8. Accumulated power probability of BC3 ME.

Figure 8. Accumulated power probability of BC3 ME.

Figure 9. Accumulated power probability of BC4 ME.

Figure 9. Accumulated power probability of BC4 ME.

Figure 10. Operation hours of four BCs.

Figure 10. Operation hours of four BCs.

Table 2. NOx PPEF of ME and GE.

Table 3. Total NOx emissions from ME of four BCs.

Figure 11. Total NOx emissions from GEs and running hours of SG.

Figure 11. Total NOx emissions from GEs and running hours of SG.

Figure 12. Comparison of PPEF and NOx certification values of MEs.

Figure 12. Comparison of PPEF and NOx certification values of MEs.

Figure 13. Comparison of total NOx emissions with different EFs.

Figure 13. Comparison of total NOx emissions with different EFs.

Figure 14. NOx emission reduction by limiting the NOx EF at any load levels.

Figure 14. NOx emission reduction by limiting the NOx EF at any load levels.

Figure 15. EFs comparison of BC1 and related studies.

Figure 15. EFs comparison of BC1 and related studies.

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