There is currently an ongoing discussion in the compression industry about the advantages and technical differences of tandem compressors with multiple compressor cases versus back-to-back or other type of multi-compartment single-case compressors. Process requirements for centrifugal compressors often result in compression in several sections. There are various reasons for that: High compression ratios; Process gas streams at different pressure levels; Process gas off-takes; Requirement for gas treatment at intermediate pressure levels; Requirement to operate sections either in series or in parallel, to increase the operating range; Intercooling to avoid high discharge temperatures, or to reduce the power requirement; Process conditions require different operating speeds for the compressors.
展开▼
