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Desiccant water adsorption in ammonia, carbon dioxide and hydrocarbon systems.

Author(s) : BROESBY OLSEN F.

Summary

In refrigeration systems water is responsible for chemical reaction problems. In several corrosion types and many refrigerant and oil decomposition phenomena water is the active ingredient. Traditionally water in refrigeration systems is removed by desiccant filter driers. With non polar CFCs the drying job is easy for the filter drier to do. No strong forces between refrigerant and water attempts to counteract the water uptake in simple desiccants. With polar refrigerants like most of the new HFCs, the kinetic forces between water and refrigerant molecules are giving desiccants a much harder job to do. Here the molecular sieve desiccants are very effective. But with ammonia being nearly as polar as water and with molecules almost equal in size, desiccant drying problems are heavy. These problems will be discussed and outlined in the presentation together with the situation in the natural working fluids hydrocarbons and carbon dioxide.

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Pages: p 475-486

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Details

  • Original title: Desiccant water adsorption in ammonia, carbon dioxide and hydrocarbon systems.
  • Record ID : 1999-2789
  • Languages: English
  • Source: Natural Refrigerants, Energy Efficiency, Cost and Safety. Natural Working Fluids '98. IIR-Gustav Lorentzen Conference.
  • Publication date: 1998/06/02
  • Document available for consultation in the library of the IIR headquarters only.

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