냉열회수 공정을 적용한 LNG 연료 추진선용 연료공급시스템의 개념 설계

다국어 초록 (Multilingual Abstract)

As the environmental regulations in the ship and marine sectors are strengthened, LNG fueled ships are attracting attention as a new alternative. This study has proposed an LNG(Liquefied Natural Gas) fueled ship of new concepts that can be recovered from the cold energy of the existing LNG fueled ship and the fuel gas supply system to perform a conceptual design. ORC(Organic Rankine Cycle) cold recovery system was adopted in the existing fuel supply system to recover the cold energy. The heat source was the jacket cooling water of the main engine and the waste heat of the exhaust gas which can be easily obtained during the voyage. As a result, when the load of the main engine is NCR(Normal Continuous Rating), the turbine produces up to 118.7 kW of power and 12.1 % of thermal efficiency when the engine jacket cooling water is used as the heat source. Using the waste heat of the exhaust gas as the heat source at the same load of main engine, the turbine could obtain the maximum power of 168.7 kW. When the load of the main engine is the MCR(Maximum Continuous Rating), which is the maximum continuous output, the turbine generates up to 187 kW of power. Accordingly, 118.7 kW and 168.7 kW of cold energy could be recovered from the turbine, respectively. If the use of cold energy in the LNG fueled ship becomes possible, it will not only meet the environmental regulations but also help improve the energy efficiency of the ship.

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