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    A Study on the Performance and Emissions of HCCI Oxy-Fuel Combustion in a CFR Engine with Recirculated Carbon Dioxide

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    A study on the performance.pdf
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    Accepted manuscript
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    Type
    Conference Paper
    Authors
    Mohammed, Abdulrahman cc
    Elkhazraji, Ali cc
    Jan, Sufyan
    Johansson, Bengt cc
    KAUST Department
    Mechanical Engineering Program
    Mechanical Engineering
    Physical Science and Engineering (PSE) Division
    Clean Combustion Research Center
    Date
    2020-09-15
    Embargo End Date
    2021-03-16
    Permanent link to this record
    http://hdl.handle.net/10754/665833
    
    Metadata
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    Abstract
    Stringent emission regulations and the anticipated climate change call for a paradigm shift in the design of the conventional internal combustion engines. One way to combat this problem is oxy-fuel combustion in which the combustion products are mainly water vapor and carbon dioxide. Water vapor can be easily separated by condensation and carbon dioxide is then easily captured and stored. However, many technical challenges are associated with this mode of combustion. There are many challenges facing oxy-fuel combustion before it find its way to commercial production especially for internal combustion engines. One such challenge is the relatively high temperature of the oxy-fuel combustion. A solution to this problem is the recirculation of the generated CO2 to moderate the in-cylinder temperature. Therefore, careful study of the effect of recirculating the CO2 back to combustion chamber is needed before the implementation of such a concept. This study is a continuation of a previous work published by the authors. In the previous study, the performance and emissions of an oxy-fuel HCCI engine were investigated. The in-cylinder temperature was moderated by supplying the engine with fresh CO2 from gas cylinders. In this present work the performance of the same oxy-fuel HCCI engine is investigated but the difference is that the in-cylinder temperature is regulated by recirculating the generated CO2. The experiments were conducted in a variable compression CFR engine that was modified to operate in oxy-fuel mode with recycled carbon dioxide. The emissions were also measured using an FTIR exhaust analyzer. The results showed that the implementation of this concept is possible. However, the indicated thermal efficiency deteriorates due to lower combustion and gas exchange efficiencies. Also, the CO2 recirculation resulted in higher CO and unburned hydrocarbon (UHC) emissions.
    Citation
    Mohammed, A., Elkhazraji, A., Jan, S., & Johansson, B. (2020). A Study on the Performance and Emissions of HCCI Oxy-Fuel Combustion in a CFR Engine with Recirculated Carbon Dioxide. SAE Technical Paper Series. doi:10.4271/2020-01-2065
    Publisher
    SAE International
    Conference/Event name
    SAE 2020 International Powertrains, Fuels and Lubricants Meeting, PFL 2020
    DOI
    10.4271/2020-01-2065
    Additional Links
    https://www.sae.org/content/2020-01-2065/
    ae974a485f413a2113503eed53cd6c53
    10.4271/2020-01-2065
    Scopus Count
    Collections
    Conference Papers; Physical Science and Engineering (PSE) Division; Mechanical Engineering Program; Clean Combustion Research Center

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