Double mixed refrigerant LNG process provides viable alternative for tropical conditions

07/08/2002
Based on a presentation to 82nd Annual GPA Convention, Dallas, Mar. 11-13, 2002.A comparison of LNG processes for tropical conditions showed that Shell double mixed refrigerant (DMR) process is a competitive alternative for the propane mixed refrigerant (C3MR) process. For both processes, an end-flash system provides many advantages.Production capacity is 10-15% higher for the same gas turbine compressor drivers (two General Electric Frame 7s) and helper motor sizes. Corresponding specific costs are 6-8% lower. For single-train developments, these differences can translate into $150 million additional net present value (NPV) over the project's lifetime.The DMR process was first select...
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