Gas Fuelled Ship용 재기화 시스템의 Eglycol Water 혼합비율에 따른 시스템 특성분석
An analysis on the characteristics of regasification system for gas fuelled ship depending on the mixing ratio of eglycol and water
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초록
최근 대기오염 방지를 위한 각종 규정들이 강화되고, 연료유 가격의 상승으로 인해 LNG(LiquefiedNatural Gas)를 선박의 추진연료로 사용하는 Gas Fuelled Ship의 등장은 필연적이게 되었다. 본 연구에서는Gas Fuelled Ship에서 연료로 사용되는 LNG를 DF(Dual-Fuel)엔진에 공급하기 전 기화 시켜주기 위해Eglycol water(Ethylene glycol water)를 가열매체로 사용한 재기화 시스템을 구성하고, Eglycol과 물의 혼합비율에따른 시스템 특성을 분석하여 다음과 같은 결과를 얻었다. DF엔진으로 공급되는 천연가스의 압력과 온도 그리고 유량이 일정하게 유지될 때 Eglycol의 혼합비율이증가할수록 Eglycol water의 혼합비열이 낮아지게 되면서 물만을 사용했을 때와 대비하여 1.65배 많은 cycle유량과 1.54배의 펌프 소요 동력이 요구됨을 확인하였고, vaporizer의 크기를 고정한 후 Eglycol의 혼합비에따른 DF엔진으로 공급되는 천연가스의 온도 및 vaporizer 출구측 Eglycol water의 온도를 산정하였다.
Abstract
Recently, the regulations of the Local and Global for a variety of air pollution prevention has beenenhanced by the steep rise in fuel oil prices. So, the appearance of Gas Fuelled Ships became necessary. Inthis study, we configured a regasification system which uses Eglycol water as a heating medium to evaporatebefore being supply fuel to the DF engine, then we analysed the system properties according to the Eglycolwater mixing ratio. The results were as follows. When pressure, temperature, and flux of natural gas(NG) which are supplied to DF engines are uniformlykept, the higher mixing ratio of Eglycol is, the lower mixing specific heat of Eglycol water. Andthe cycle flux and electric power were 1.65 and 1.54 times more required. respectively, than water wasused as the heating medium. Basic variables including mass flux according to the mixing ratio of Eglycolwater, required electric power of operating fluid pumps, the temperature of natural gas which is suppliedto the engine, and the heat exchanger’s capacity were drawn from the gotten results.
참고문헌 (12)
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