Proceedings of the SAREK Conference (대한설비공학회:학술대회논문집)
- 2008.11a
- /
- Pages.181-185
- /
- 2008
Analysis of high efficiency natural gas liquefaction cycle with mixed refrigerant
고효율 혼합 냉매 천연 가스 액화 공정에 대한 고찰
- Baek, Seung-Whan (Department of Mechanical Engineering, KAIST) ;
- Hwang, Gyu-Wan (Department of Mechanical Engineering, KAIST) ;
- Jeong, Sang-Kwon (Department of Mechanical Engineering, KAIST)
- Published : 2008.11.21
Abstract
The new concept for liquefaction of natural gas has been designed and simulated in this paper. Conventional liquefaction cycles are usually composed with Joule-Thomson valves at lower temperature refrigerant cycle. The new concept of natural gas liquefaction is discussed. The main difference with conventional liquefaction process is the presence of the turbine at low temperature of MR (mixed refrigerant) cycle. The turbine acts as expander but also as an energy generator. This generated energy is provided to the compressor which consumes energy to pressurize refrigerants. The composition of the mixed refrigerant is investigated in this study. Components of the refrigerant are methane, propane and nitrogen. Composition for new process is traced with Aspen HYSYS software. LNG heat exchangers are analyzed for the new process. Heating and cooling curves in heat exchangers were also analyzed.