State Transitions Logical Design for Hybrid Energy Generation with Renewable Energy Sources in LNG Ship

Michael E. Stamatakis and Maria G. Ioannides
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Michael E. Stamatakis: School of Electrical and Computer Engineering, National Technical University of Athens, 15773 Athens, Greece
Maria G. Ioannides: School of Electrical and Computer Engineering, National Technical University of Athens, 15773 Athens, Greece

Energies, 2021, vol. 14, issue 22, 1-26

Abstract: In terms of energy generation and consumption, ships are autonomous and isolated power systems with energy requirements related to the type and kind of power demands and according to ship types: passenger ships, or commercial ships. Power supply on ships is traditionally based on engines thermal generators, which use fossil fuels, diesel, or natural gas. Due to the continuous operation of thermal generators in ships, this ends up increasing polluting gas emissions for the environment, mainly CO 2 . A combination of Renewable Energy Sources (RES) with traditional ship thermal engines can reduce CO 2 emissions, resulting in a ‘greener’ interaction between ships and the environment. Due to the varying power needs for ship operation, considering the varying nature of load demands during long distance travels and during harbor entry, the use of RES must be evaluated. This paper presents a new control method to balance LNG ship load demands and power generation from RES, based on an accurate model and solution in real conditions. The Energy Management System (EMS) is designed and implemented in a Finite State Machine structure using the logical design of state transitions. The results prove that the reduction of consumption of fossil fuels is feasible, and, if this is combined with RES, it reduces CO 2 emissions.

Keywords: energy management; CO 2 emissions; LNG ship; photovoltaic systems; renewable energy sources; ship engines generators; wind generators (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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