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Experimental analysis of a desiccant-based air-conditioning system for a flower greenhouse.

Author(s) : LONGO G. A., GASPARELLA A., STORATO S.

Summary

This paper presents an experimental comparative analysis between an innovative desiccant-based and a traditional air conditioning system for a flower greenhouse in winter season. The innovative air-conditioning system based on H2O-LiCl desiccant consists of a dehumidification unit in which the conditioned air is dehumidified by the strong desiccant solution and a regeneration unit in which the weak desiccant solution heated up by hot water is regenerated by scavenger air evolving in closed loop. A heat recovery is performed on the desiccant regeneration process. An auxiliary radiator driven by hot water completes the sensible heat needs of the greenhouse. In the traditional system the thermo-hygrometric control has been carried out by ventilation with outside air (latent load) and a radiator driven by hot water (sensible load). Two identical flower greenhouses working near Bergamo (Italy) have been equipped with a traditional and an innovative air conditioning system respectively. The experimental comparison shows a 10% average primary energy saving for the desiccant-based system with respect to the traditional one in the winter season. In addition, because the sanitising effect of desiccant and a more effective control of the humidity inside the greenhouse, the innovative system ensures also a consistent reduction in the use of pesticides with relevant economical and environmental advantages.

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Pages: 745-750

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Details

  • Original title: Experimental analysis of a desiccant-based air-conditioning system for a flower greenhouse.
  • Record ID : 30001305
  • Languages: English
  • Source: Sources/sinks Alternative to the Outside Air for Heat Pump and Air-conditioning Techniques (Alternative Sources - AS), Padua, Italy, April 5-7, 2011. / International Sorption Heat Pump Conference (ISHPC11), Padua, Italy, April 6-8, 2011.
  • Publication date: 2011/04/06

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