Nathan Vetter, Cameron Compression, USA
This paper presents the challenges of corrosive landfill gas delivery to a power generation turbine, which requires oil free gas to ensure lowest emissions and maximum service life. The solution provided by integrally geared centrifugal compressor technology is then explored.
The partnership of Solar Turbine and Cameron Compression is provided as a case study. Together they upgraded BMW’s Spartanburg, South Carolina, landfill gas power generation capabilities to double the output power of the previous system, while keeping the amount of landfill gas consumed constant. Two Solar Taurus 70 turbines were each teamed with a TG2040 Centrifugal Compressor from Cameron Compression to produce 11MW of power.
The value proposition of integrally geared centrifugal compressor technology versus the rotary screw compressors in the previous installation, as well as the alternate solution of reciprocating compressors, is explored. Considerations such as material selection and leakage sealing technology of the compressor are investigated. A detailed analysis of the patented low loss babbitted labyrinth type seal, which ensures oil free gas delivery, is then presented.
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