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Wet compression with NH3-CO2-H2O in twin screw compressors.

Number: pap. n. 417

Author(s) : GRUIJTHUIJSEN D., GUDJONSDOTTIR V., INFANTE FERREIRA C.

Summary

Industrial waste streams can be upgraded efficiently with heat pumps. However, heat pumps are rarely used in industry. One of the main problems is long payback periods. Compression-resorption heat pumps (CRHPs) have potentially a better performance than traditional technologies for industrial applications when there is a temperature glide of the heat sink or source. CRHPs normally use ammonia-water as working fluid. Alternative working fluids have the potential to increase the performance even further. NH3-CO2-H2O has been identified as a potential candidate and heat exchanger experiments confirmed that the heat transfer rate increases compared to ammonia-water. In this study the effects of this mixture on the compressor of CRHPs are investigated. The preliminary results indicate that adding similar amounts of CO2 as in the heat exchanger experiments has a positive effect on the isentropic efficiency of the compressor so that a significant performance increase can be expected for the CRHP system.

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Pages: 8

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Details

  • Original title: Wet compression with NH3-CO2-H2O in twin screw compressors.
  • Record ID : 30026417
  • Languages: English
  • Source: Proceedings of the 25th IIR International Congress of Refrigeration: Montréal , Canada, August 24-30, 2019.
  • Publication date: 2019/08/24
  • DOI: http://dx.doi.org/10.18462/iir.icr.2019.0417

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