Economic Fuel Dispatch of Diesel Generators in Offshore Support Vessels

  • Farkhondeh Jabari 1- Postdoctoral Researcher at Faculty of Electrical & Computer Engineering, University of Tabriz, Tabriz, Iran.
  • Behnam Mohammadi-Ivatloo Professor at Faculty of Electrical & Computer Engineering, University of Tabriz, Tabriz, Iran.
Keywords: Diesel Engine, Specific Fuel Consumption (SFC), Offshore Support Vessels, Economic Fuel Dispatch, Generalized Algebraic Mathematical Modeling System (GAMS)


In a typical offshore support vessel, a number of diesel generators are installed to supply its electrical demand. Specific fuel consumption (SFC) of a diesel unit changes nonlinearly with respect to its power generation. Hence, this paper presents an economic fuel dispatch strategy for multi-diesel units operated in offshore support vessels using the cubic spline interpolation  curve  fittings  of  the  SFC-power  nonlinear  relations.  A  mixed-integer nonlinear programming problem is coded under generalized algebraic mathematical modeling system (GAMS) and solved using branch-and-reduce optimization navigator tool to minimize the hour-ahead specific fuel consumption of the diesel-electric propulsion system. The upper and  lower bounds  of the power generation  within  each  non-linear operating interval as well as the load-generation balance constraint are involved in simulations. The hourly power generation and the specific fuel consumption of each diesel generator are selected as positive decision variables. Equal and unequal power generation capacities are considered for four and six diesel units in two case studies. Numerical results demonstrated that GAMS is able to find better and more effective solutions than genetic algorithm and particle swarm  optimization method in lower calculation time and  less computational burden.



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How to Cite
Jabari, F., & Mohammadi-Ivatloo, B. (2020). Economic Fuel Dispatch of Diesel Generators in Offshore Support Vessels. Majlesi Journal of Energy Management, 9(1), 27-32. Retrieved from