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Active desiccant integration with packaged rooftop HVAC equipment.

Author(s) : SAND J. R., FISCHER J. C.

Summary

Integration of a rooftop, unitary air conditioner with an active-desiccant module allows the use of a standard rooftop air conditioner with a thermally regenerated active desiccant component to provide a compact, cost-effective, and simple-to-use packaged system for efficiently pretreating and supplying ventilation air adequate to ensure healthy indoor environments. By designing a combined vapour-compression/active-desiccant system with the desiccant component positioned after a conventional cooling coil, the dehumidification effectiveness of the desiccant was significantly enhanced because it operates on cold, saturated, or nearly saturated, air leaving the evaporator. 'Post-coil' rather than the normally used, 'pre-coil' desiccant arrangement also minimizes the regeneration temperature required for the active-desiccant, allows for partial by-pass for recombination with and post-cooling of the desiccated air, and a dramatically decreases overall size for the pre-conditioning unit.

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Details

  • Original title: Active desiccant integration with packaged rooftop HVAC equipment.
  • Record ID : 2004-2444
  • Languages: English
  • Source: 21st IIR International Congress of Refrigeration: Serving the Needs of Mankind.
  • Publication date: 2003/08/17

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