Integrally geared radial expanders are applied where energy can be recovered from medium to high temperature off-gas or process gas streams from chemical and other industrial processes. The design is based on our integrally geared centrifugal compressor concept invented more than 70 years ago.
Energy in the hot gas stream is converted directly to mechanical energy which can then be used to drive a compressor or generator respectively. While improving the overall energy balance of the plant, this also saves operating expenses as well as capital cost because there is no need for additional heat exchangers and steam generation equipment otherwise required for heat transfer.
Radial expanders can be configured as stand-alone units with up to three expansion stages arranged around a central bull gear, or they can be integrated into the casing of an integrally geared compressor transferring power directly to the compressor bull gear by a pinion shaft.