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CO2 refrigeration systems for offshore process cooling.

Author(s) : ADAMSON B.

Summary

Large refrigeration systems (typically 500-5000 kWR) are commonly used on offshore platforms for preliminary processing of natural gas before it is sent ashore. Although vast quantities of flammable hydrocarbons are processed through these platforms and the safety systems required for use of hydrocarbon refrigerants would not add any incremental cost compared to non-flammable, there is a preference for safety reasons to use non-flammable refrigerants, and most systems use R134a. Due to high corrosion and the difficult maintenance environment, leakage is high, and more than 100% annual loss is not uncommon. Most natural gas contains at least a small proportion of CO2, and in high-CO2 fields (which can exceed 30% CO2) refrigeration is used as part of the CO2 removal process, so a source of CO2 is available. Consequently, offshore gas processing is an application uniquely suited to CO2 refrigeration systems, provided this can be done competitively compared to other refrigerants.

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Pages: 2010-2

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Details

  • Original title: CO2 refrigeration systems for offshore process cooling.
  • Record ID : 2010-0949
  • Languages: English
  • Source: 9th IIR-Gustav Lorentzen Conference on Natural Working Fluids (GL2010). Proceedings. Sydney, Australia, April 12-14, 2010.
  • Publication date: 2010/04/12

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