(50b) Transient Characteristics of Two-Phase LNG Expanders
- Conference: AIChE Spring Meeting and Global Congress on Process Safety
- Year: 2007
- Proceeding: 2007 Spring Meeting & 3rd Global Congress on Process Safety
- Group: 7th Natural Gas Utilization
- Time: Tuesday, April 24, 2007 - 9:00am-9:30am
For optimized LNG production, particularly to reduce liquefaction costs or to extend the lifetime of depleting gas fields, it was previously suggested to use two-phase LNG expanders operating in series with a single-phase liquid LNG expander. While the performance of liquid expanders depends only on mass flow and differential head, the performance of two-phase expanders depend on additional properties like LNG composition, temperature, and outlet pressure. The effect of non-linear oscillations and of transient operation on the performance of two-phase LNG expanders operating in series with single-phase LNG expanders is discussed and presented.