Optimal Design of Combined LNG/LPG Regasification System

摘要

In compatibility of liquefied natural gas (LNG) calorific values between importingrncountries has become one of the important technical and commercial issues in the LNGrnindustry. Until now, heavy hydrocarbon removal (HHR) system, or nitrogen dilutionrnsystem has been used in controlling the calorific value; however, these methods canrnmake the process more complicated and less profitable. This is especially the case forrnoffshore plants. A new concept of “Rich LNG” may bring the fundamental andrneconomic solution for the calorific compatibility problem by combining the existingrnchains of LNG industry. But, in “Rich LNG”, the natural gas liquids (NGL) removalrnmust be efficiently performed by utilizing abundant available cold energy during thernLNG regasification process in offshore or onshore. In this study, a multi-objective andrnmixed-integer nonlinear programming technique is applied for generating the completernPareto optimal sets for a new calorific value adjustment process.