Dynamic simulation of Methane Number variations in LNG fueled vessels with periodic bunkering operations
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The effect of periodic bunkering operations on methane number (MN) and Wobbe index (WI) variations in the fuel gas supply system of liquefied natural gas (LNG)-fueled vessels has been numerically investigated by considering the changes in the representative gas composition and separator temperature. As a result, it was possible to manage the MN to avoid the occurrence of abnormal operation for the commercial engine requirement of MN ≥ 65 when the separator temperature was set to −50 ℃ despite the rich gas composition for bunkering having MN < 65. All the simulation conditions indicated that the main and generator engines were operated with WI < 56, while the boiler was operated in a wide range of MN ≒ 37–85 and WI ≒ 53–80.
Abstract
The effect of periodic bunkering operations on methane number (MN) and Wobbe index (WI) variations in the fuel gas supply system of liquefied natural gas (LNG)-fueled vessels has been numerically investigated by considering the changes in the representative gas composition and separator temperature. As a result, it was possible to manage the MN to avoid the occurrence of abnormal operation for the commercial engine requirement of MN ≥ 65 when the separator temperature was set to −50 ℃ despite the rich gas composition for bunkering having MN < 65. All the simulation conditions indicated that the main and generator engines were operated with WI < 56, while the boiler was operated in a wide range of MN ≒ 37–85 and WI ≒ 53–80.
참고문헌 (13)
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