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Increasing exhaust temperature to enable after-treatment operation on a two-stage turbo-charged medium speed marine diesel engine

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  • Verschaeren, Roel
  • Verhelst, Sebastian

Abstract

Nitrogen-oxides (NOx) are becoming more and more regulated. In heavy duty, medium speed engines these emission limits are also being reduced steadily: Selective catalytic reduction is a proven technology which allows to reduce NOx emission with very high efficiency. However, operating temperature of the catalytic converter has to be maintained within certain limits as conversion efficiency and ammonia slip are very heavily influenced by temperature. In this work the engine calibration and hardware will be modified to allow for a wide engine operating range with Selective catalytic reduction. The studied engine has 4MW nominal power and runs at 750rpm engine speed, fuel consumption during engine tests becomes quite expensive (±750kg/h) for a measurement campaign. This is why a simulation model was developed and validated. This model was then used to investigate several strategies to control engine out temperature: different types of wastegates, injection variation and valve timing adjustments. Simulation showed that wastegate application had the best tradeoff between fuel consumption and exhaust temperature. Finally, this configuration was built on the engine test bench and results from both measurements and simulation agreed very well.

Suggested Citation

  • Verschaeren, Roel & Verhelst, Sebastian, 2018. "Increasing exhaust temperature to enable after-treatment operation on a two-stage turbo-charged medium speed marine diesel engine," Energy, Elsevier, vol. 147(C), pages 681-687.
    • Handle: RePEc:eee:energy:v:147:y:2018:i:c:p:681-687
    DOI: 10.1016/j.energy.2018.01.081
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    References listed on IDEAS

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    1. Triantafyllopoulos, Georgios & Kontses, Anastasios & Tsokolis, Dimitrios & Ntziachristos, Leonidas & Samaras, Zissis, 2017. "Potential of energy efficiency technologies in reducing vehicle consumption under type approval and real world conditions," Energy, Elsevier, vol. 140(P1), pages 365-373.
    2. Benajes, Jesús & Molina, Santiago & Novella, Ricardo & Belarte, Eduardo, 2014. "Evaluation of massive exhaust gas recirculation and Miller cycle strategies for mixing-controlled low temperature combustion in a heavy duty diesel engine," Energy, Elsevier, vol. 71(C), pages 355-366.
    3. Verschaeren, Roel & Schaepdryver, Wouter & Serruys, Thomas & Bastiaen, Marc & Vervaeke, Lieven & Verhelst, Sebastian, 2014. "Experimental study of NOx reduction on a medium speed heavy duty diesel engine by the application of EGR (exhaust gas recirculation) and Miller timing," Energy, Elsevier, vol. 76(C), pages 614-621.
    4. Abu-Jrai, Ahmad M. & Al-Muhtaseb, Ala'a H. & Hasan, Ahmad O., 2017. "Combustion, performance, and selective catalytic reduction of NOx for a diesel engine operated with combined tri fuel (H2, CH4, and conventional diesel)," Energy, Elsevier, vol. 119(C), pages 901-910.
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    Cited by:

    1. Hoang, Anh Tuan, 2018. "Waste heat recovery from diesel engines based on Organic Rankine Cycle," Applied Energy, Elsevier, vol. 231(C), pages 138-166.
    2. Trivyza, Nikoletta L. & Rentizelas, Athanasios & Theotokatos, Gerasimos, 2019. "Impact of carbon pricing on the cruise ship energy systems optimal configuration," Energy, Elsevier, vol. 175(C), pages 952-966.
    3. Luján, José Manuel & Serrano, José Ramon & Piqueras, Pedro & Diesel, Bárbara, 2019. "Turbine and exhaust ports thermal insulation impact on the engine efficiency and aftertreatment inlet temperature," Applied Energy, Elsevier, vol. 240(C), pages 409-423.

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