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How to Resolve Single Mixed-Refrigerant Compressor Control Challenges

Resolving Design Challenges

Many small-scale LNG plants use the two-stage single mixed-refrigerant compressor or the nitrogen expander technology. 

Its typical design presents challenges. These include molecular weight variations and lack of non-return valves. 

However, it’s possible to re-design the piping layout of the typical single mixed-refrigerant  compressor so that it is compatible with good anti-surge control requirements. 

We lay out typical compressor design, its challenges and how to resolve them.

See our solutions.

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