Allows for the expansion of liquefied gases into two-phase mixtures.
Based on proven impulse turbine blade technology, our impulse-type, two-phase cryogenic expander allows for the expansion of liquefied gases into two-phase mixtures. Harnessing the energy of two-phase expansion increases the expander’s generator output, reduces boil-off losses, and improves the overall liquefaction and cooling processes.
This cryogenic expander has optimized staging to minimize axial load at the radial ball bearings and tolerates a high content of vapor mass. Custom-designed, it is offered for liquefaction and refrigeration processes with relatively high vaporization capability in cryogenic hydrocarbon applications. The isentropic efficiency of these units is estimated at around 60% to 70%, depending on the mass flow rate and unit pressure drop.
These expanders do not require a Joule Thomson (JT) valve at the downstream as compared to a Francis-type expander. Impulse-type, two-phase cryogenic expanders have generator nameplate ratings ranging from 300 kW to 2.2 MW for a single unit. If the process requires high-flow output, these units can be installed and operated in parallel configuration. In addition, they can be retrofitted to existing LNG liquefaction and cooling applications.