Methane Number Control of Fuel Gas Supply System Using Combined Cascade/Feed-Forward Control
| Autor: | Byung-Gun Jung, Soon-kyu Hwang |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
0209 industrial biotechnology
Computer science 020209 energy feed-forward control PID controller Ocean Engineering Environmental pollution 02 engineering and technology Propulsion lcsh:Oceanography 020901 industrial engineering & automation lcsh:VM1-989 Fuel gas disturbance rejection Natural gas Control theory PI controller 0202 electrical engineering electronic engineering information engineering lcsh:GC1-1581 cascade control Water Science and Technology Civil and Structural Engineering business.industry Feed forward lcsh:Naval architecture. Shipbuilding. Marine engineering methane number natural gas Cascade business |
| Zdroj: | Journal of Marine Science and Engineering, Vol 8, Iss 307, p 307 (2020) Journal of Marine Science and Engineering Volume 8 Issue 5 |
| ISSN: | 2077-1312 |
| DOI: | 10.3390/jmse8050307 |
| Popis: | Liquefied natural gas began to attract attention as a ship fuel to reduce environmental pollution and increase energy efficiency. During this period, highly efficient internal combustion engines emerged as the new propulsion system instead of steam turbines. However, Otto-cycle engines must use fuel that meets the methane number that was given by the engine makers. The purpose of this study was to develop a system configuration and a control method of methane number adjustment using combined cascade/feed-forward controllers for marine Otto-cycle engines to improve reference tracking and the disturbance rejection. The main principle involves controlling the downstream gas temperature of the fuel gas supply system to meet the required methane number. Three controllers are used in the combined cascade/feed-forward control for adjusting the downstream of the gas temperature: the cascade loop has two controllers and the feed-forward has one controller. The two controllers in the cascade loop are designed with proportional&ndash integral (PI) controllers. The remaining controller is based on feed-forward control theory. A simulation was conducted to verify the efficacy of the proposed method, focusing on the disturbance rejection and set-point tracking, in comparison with a single PI controller, a single PI controller with feed-forward, and cascade control. |
| Databáze: | OpenAIRE |
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