July 2010

Special Report: Liquefied Natural Gas Developments

Dynamic simulation of liquefied natural gas processes

Here’s how to improve the process design and operation of your facility

Stephenson, G., Wang, L., Honeywell Process Solutions

A multi-tube, spirally-wound, cryogenic heat exchanger, the main heat exchanger (MHE) is the principal piece of heat-transfer equipment in mixed-refrigerant liquefaction cycles for producing liquefied natural gas (LNG). An MHE unit operation model called the spirally-wound tube-bundle module was developed as an integral component of the dynamic simulation capabilities for a process modeling package. The model predicts the axial temperature, vapor fraction and pressure profiles for each tube stream and shell stream and axial and radial temperature profiles for the tube walls, shell wall and insulation. The spirally-wound tube bundle module, together with other key unit operation modules, can

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