LOU Di-ming, BAO Song-jie, HU Zhi-yuan, TAN Pi-qiang. Cruise speed optimization of tugboat based on real fuel consumption and emission[J]. Journal of Traffic and Transportation Engineering, 2017, 17(1): 93-100.
Citation: LOU Di-ming, BAO Song-jie, HU Zhi-yuan, TAN Pi-qiang. Cruise speed optimization of tugboat based on real fuel consumption and emission[J]. Journal of Traffic and Transportation Engineering, 2017, 17(1): 93-100.

Cruise speed optimization of tugboat based on real fuel consumption and emission

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  • Author Bio:

    LOU Di-ming(1963-), male, professor, PhD, +86-21-69589207, loudiming@tongji.edu.cn

  • Received Date: 2016-08-12
  • Publish Date: 2017-02-25
  • The test of fuel consumption and emission of offshore tugboat in Shanghai Waigaoqiao Port was conducted by using portable emission measurement system, the relationship between fuel consumption, emission and cruise speed was fitted, an optimization model of cruise speed was established, and the optimal fuel consumption and emission of tugboat and corresponding speed were analyzed.Test result shows that CO2 emission factor is related to fuel quality and working condition of ship, and the accurate emission result can be obtained by estimating based on empirical emission factor comparing with real-ship emission test.When power function is used to fit the relationship between the emissions of CO, CO2, THC, NOx, PM and PN, fuel consumption and cruise speed, the determination coefficient of each fitting curve is larger than0.9.Under the condition that fuel consumptionis optimized, when cruise speed is 7.21 kn, the total fuel consumption of tugboat in single cruise condition reaches the minimum and decreases by33.40% compared to the maximum cruise speed of 12.00 kn.The optimal cruise speed reachesthe maximum while both fuel consumption and NOxemission are optimized.The optimal cruise speed reaches the minimum while both fuel consumption and all emissions are optimized.When cruise speed is 6.96 kn, the total fuel consumption and emission of NOx, PM and PN reach the optimal values, compared to the maximum cruise speed, the total fuel consumption decreases by33.29%, and the emission reduction rates of CO, CO2, THC, NOx, PM, PN are 59.56%, 76.37%, 82.34%, 92.36%, 53.10%, 62.25% respectively. Obviously, the total fuel consumption and emissions of tugboat decrease significantly at optimal cruise speed.

     

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