The need for reductions of nitrogen oxides (NOx), sulfur oxides (SOx), and carbon dioxide (CO2) emissions has been acknowledged on the global level. However, it is difficult to meet the strengthened emissions regulations by using the conventional marine diesel engines. Therefore, lean burn gas engines have been recently attracting attention in the maritime industry. Because they use natural gas as fuel and can simultaneously reduce both NOx and CO2 emissions. On the other hand, since methane is the main component of natural gas, the slipped methane, which is the unburned methane emitted from the lean burn gas engines, might have a potential impact on global warming. The authors have proposed a combined exhaust gas recirculation (C-EGR) system to reduce the slipped methane from the gas engines and NOx from marine diesel engines by providing the exhaust gas from lean burn gas engine to the intake manifold of the marine diesel engine using a blower. Since the exhaust gas from the gas engine includes slipped methane, this system could reduce both the NOx from the marine diesel engine and the slipped methane from the lean burn gas engine simultaneously. This paper introduces the details of the proposed C-EGR system and presents the experimental results of emissions characteristics on the C-EGR system. As a result, it was confirmed that the C-EGR system attained more than 75% reduction of the slipped methane in the intake gas. Additionally, the NOx emission from the diesel engine decreased with the effect of the exhaust gas recirculation (EGR) system.
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February 2018
Research-Article
Evaluation of Emissions Characteristics of Marine Diesel Engine Intake of Exhaust Gas of Lean Burn Gas Engine
Yoshifuru Nitta,
Yoshifuru Nitta
National Institute of Maritime,
Port and Aviation Technology,
6-38-1, Shinkawa, Mitaka,
Tokyo 181-0004, Japan
e-mail: nitta@nmri.go.jp
Port and Aviation Technology,
6-38-1, Shinkawa, Mitaka,
Tokyo 181-0004, Japan
e-mail: nitta@nmri.go.jp
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Dong-Hoon Yoo,
Dong-Hoon Yoo
National Institute of Maritime,
Port and Aviation Technology,
6-38-1, Shinkawa, Mitaka,
Tokyo 181-0004, Japan
e-mail: komorebi023@gmail.com
Port and Aviation Technology,
6-38-1, Shinkawa, Mitaka,
Tokyo 181-0004, Japan
e-mail: komorebi023@gmail.com
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Sumito Nishio,
Sumito Nishio
National Institute of Maritime,
Port and Aviation Technology,
6-38-1, Shinkawa, Mitaka,
Tokyo 181-0004, Japan
e-mail: nishio@nmri.go.jp
Port and Aviation Technology,
6-38-1, Shinkawa, Mitaka,
Tokyo 181-0004, Japan
e-mail: nishio@nmri.go.jp
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Yasuhisa Ichikawa,
Yasuhisa Ichikawa
National Institute of Maritime,
Port and Aviation Technology,
6-38-1, Shinkawa, Mitaka,
Tokyo 181-0004, Japan
e-mail: ichikawa@nmri.go.jp
Port and Aviation Technology,
6-38-1, Shinkawa, Mitaka,
Tokyo 181-0004, Japan
e-mail: ichikawa@nmri.go.jp
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Koichi Hirata,
Koichi Hirata
National Institute of Maritime,
Port and Aviation Technology,
6-38-1, Shinkawa, Mitaka,
Tokyo 181-0004, Japan
e-mail: khirata@nmri.go.jp
Port and Aviation Technology,
6-38-1, Shinkawa, Mitaka,
Tokyo 181-0004, Japan
e-mail: khirata@nmri.go.jp
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Yudai Yamasaki
Yudai Yamasaki
Department of Mechanical Engineering,
The University of Tokyo,
7-3-1, Hongo, Bunkyou-ku,
Tokyo 113-8656, Japan
e-mail: yudai_y@fiv.t.u-tokyo.ac.jp
The University of Tokyo,
7-3-1, Hongo, Bunkyou-ku,
Tokyo 113-8656, Japan
e-mail: yudai_y@fiv.t.u-tokyo.ac.jp
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Yoshifuru Nitta
National Institute of Maritime,
Port and Aviation Technology,
6-38-1, Shinkawa, Mitaka,
Tokyo 181-0004, Japan
e-mail: nitta@nmri.go.jp
Port and Aviation Technology,
6-38-1, Shinkawa, Mitaka,
Tokyo 181-0004, Japan
e-mail: nitta@nmri.go.jp
Dong-Hoon Yoo
National Institute of Maritime,
Port and Aviation Technology,
6-38-1, Shinkawa, Mitaka,
Tokyo 181-0004, Japan
e-mail: komorebi023@gmail.com
Port and Aviation Technology,
6-38-1, Shinkawa, Mitaka,
Tokyo 181-0004, Japan
e-mail: komorebi023@gmail.com
Sumito Nishio
National Institute of Maritime,
Port and Aviation Technology,
6-38-1, Shinkawa, Mitaka,
Tokyo 181-0004, Japan
e-mail: nishio@nmri.go.jp
Port and Aviation Technology,
6-38-1, Shinkawa, Mitaka,
Tokyo 181-0004, Japan
e-mail: nishio@nmri.go.jp
Yasuhisa Ichikawa
National Institute of Maritime,
Port and Aviation Technology,
6-38-1, Shinkawa, Mitaka,
Tokyo 181-0004, Japan
e-mail: ichikawa@nmri.go.jp
Port and Aviation Technology,
6-38-1, Shinkawa, Mitaka,
Tokyo 181-0004, Japan
e-mail: ichikawa@nmri.go.jp
Koichi Hirata
National Institute of Maritime,
Port and Aviation Technology,
6-38-1, Shinkawa, Mitaka,
Tokyo 181-0004, Japan
e-mail: khirata@nmri.go.jp
Port and Aviation Technology,
6-38-1, Shinkawa, Mitaka,
Tokyo 181-0004, Japan
e-mail: khirata@nmri.go.jp
Yudai Yamasaki
Department of Mechanical Engineering,
The University of Tokyo,
7-3-1, Hongo, Bunkyou-ku,
Tokyo 113-8656, Japan
e-mail: yudai_y@fiv.t.u-tokyo.ac.jp
The University of Tokyo,
7-3-1, Hongo, Bunkyou-ku,
Tokyo 113-8656, Japan
e-mail: yudai_y@fiv.t.u-tokyo.ac.jp
1Corresponding author.
Contributed by the IC Engine Division of ASME for publication in the JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Manuscript received December 11, 2016; final manuscript received July 21, 2017; published online October 10, 2017. Assoc. Editor: Eric Petersen.
J. Eng. Gas Turbines Power. Feb 2018, 140(2): 022802 (8 pages)
Published Online: October 10, 2017
Article history
Received:
December 11, 2016
Revised:
July 21, 2017
Citation
Nitta, Y., Yoo, D., Nishio, S., Ichikawa, Y., Hirata, K., and Yamasaki, Y. (October 10, 2017). "Evaluation of Emissions Characteristics of Marine Diesel Engine Intake of Exhaust Gas of Lean Burn Gas Engine." ASME. J. Eng. Gas Turbines Power. February 2018; 140(2): 022802. https://doi.org/10.1115/1.4037868
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