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Energy and exergy analysis for low-temperature refrigeration system for biogas upgrading.

Number: pap. 2032

Author(s) : BASSILA J., TOUBASSY J., CLODIC D., et al.

Summary

Low-temperature refrigeration system for biogas upgrading has been developed by the Cryo Pur company based on cooling biogas in three steps: removing most of the water content at -40°C, removing siloxanes and SVOCs at -85°C and frosting CO2 at temperatures varying from -90°C to -120°C. This process transforms biogas containing typically 60% methane, 35% CO2, 5% water vapor in methane containing 2.5% of CO2. This paper studies how a single low-temperature refrigeration system is able to cool biogas with an indirect system using low-temperature heat-transfer fluids. The exergy study defines the exergy losses and served as guidance for the energy/pinch analysis that is used for the design of the heat-exchanger series and the appropriate heat recovery. An optimal system could save up to 40% of the electric consumption of the refrigeration system.

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Pages: 7 p.

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Details

  • Original title: Energy and exergy analysis for low-temperature refrigeration system for biogas upgrading.
  • Record ID : 30018597
  • Languages: English
  • Source: 2016 Purdue Conferences. 16th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Publication date: 2016/07/11

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