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Air conditioning using R-718 (water) as the refrigerant.

Author(s) : UGES P. G. H.

Summary

Static cooling is a development regarding an indirect operating air conditioning system based on the evaporation of only water (R-718) and suitable for moderate (like in Europe) and warm climates. This system consumes very little energy (up to 75% less). Temperatures below the wet bulb temperature can be achieved. It characterizes itself also by, no pollution and almost no maintenance costs. The only moving part is one fan. Static cooling implies that no condensation will occur during the cooling process. The heat is taken "indirectly" from the air by means of a heat exchanger, made of only synthetic materials. The absolute humidity of the air-to-be-cooled remains unchanged during the cooling process. The air is cooled below the wet bulb temperature by means of a hygroscopic layer on the external cooler surface. The disengaged humidity does not enter the room to be conditioned, but disappears into the open air. From a microbiological point of view, it is important to know, that there is no water collector filled with water, that no aerosols are formed and so no Legionella bacterium can be transported. Growth of algae will also not occur, because the hygroscopic layers are automatically dried when the cooling process stops. Static cooling is an alternative to the use of F-gasses and an answer to the CO2-policy. It makes cooling possible where this would hardly be feasible because of insufficient supply of energy.

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Pages: 2006-2

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Details

  • Original title: Air conditioning using R-718 (water) as the refrigerant.
  • Record ID : 2007-1703
  • Languages: English
  • Source: 7th IIR-Gustav Lorentzen Conference on Natural Working Fluids (GL2006). Proceedings
  • Publication date: 2006/05/29

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