Integrally Geared Compressors
From its invention in 1948, Siemens has perfected the design and manufacture of integrally geared compressors. Today, more than 2,200 units have been installed globally proving their worth with a wide reference base in a wide range of industries and process applications.
Integrally geared compressors are multi-shaft machines. Several pinion shafts with two impellers each are arranged around a central bull gear. For each pinion shaft a perfect combination of shaft speed and impeller size can be realized. All impellers are of overhung design and can be fitted with adjustable inlet guide vanes in front of each impeller. Inter-stage cooling of the gas stream can be done after each impeller discharge. The combination of these features allows for high volume flows, outstanding energy efficiency even under part load, all in a compact design.
For small- to medium-size compressor sizes, Siemens offers a package design. The package includes the compressor, driver, process gas coolers, lube oil console, process piping, and all tubing and wiring. The package design leads to significantly reduced on-site installation time. For large-size units all main train components are delivered separately on site and installation is on a concrete foundation.
Customized compressorsOur customized line of integrally geared machines can accommodate up to four pinion shafts with up to eight impellers total resulting in impressive pressure ratios which can be achieved in a compact design. Compressors can be designed according to API 617 or API 672 and customer specifications. Driver options depend on process and energy resources and can be electric motor, steam turbine or gas turbine and are suitable for direct turbine-drive or integrated turbine design.
Customized compressors with integrated radial expansion turbine
A variant of the customized integrally geared compressor allows the integration of a single- or two-stage radial expansion turbine as a direct drive option for the compressor. This allows the direct recovery and conversion of energy from pressurized high temperature process gas streams into kinetic energy driving the compressor. Depending on the amount of available energy this drive option can serve as a sole, main or auxiliary driver in combination with e.g. an electric motor or motor generator.
- All gear components designed and manufactured within our own supply chain
- High efficiency and outstanding operating range
- Axial inlet impellers for high volume flow
- Multi-service capability
- Up to eight impellers / stages
- Four-shaft gear for cost sensitive motor driven trains
- Inter-cooling between stages
- Design options for any kind of gas
- Designed according to API 617, API 672 and customer specifications
- Comprehensive driver options
- Volume flow rates up to 1,000,000 m³/h / 590,000 cfm
- Discharge pressure up to 200 bar / 2,900 psi
- Gear box ratings up to 65,000 kW / 87,000 hp
The first group is available in nine frames (sizes 10-100) and offers a wide range of options and can be packaged as compact single-lift units. The product line is the compact and standardized version of the customized integrally geared compressor series, the trusty workhorse of the air separation and process industries. Its high degree of standardization results in lower capital cost and shorter delivery times as compared with fully customized compressors.
The second group extends the available range of volume flow rates to between 120,000–400,000m3/h capacities with additional five frame sizes (165-400). Eighty percent of the machine is pre-engineered for consistency and repeatability. 20 percent of the machine can be customized for specific customer process needs.