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Reduction of the electricity consumption of a compression refrigeration system for air conditioning by a preceding thermally driven absorptive air dehumidification system.

Number: 0859

Author(s) : MEYER T., RICART C.

Summary

The cooling of air implies a sensible and a latent load for temperature and humidity reduction, respectively. The part required for the condensation of moisture is usually significant or even dominant. The dehumidification of air in a thermally-driven open absorption (desiccant) system followed by its cooling in a conventional chiller bears the potential for a large reduction of the electrical consumption of the process.   
In this paper, a methodology is introduced to calculate the specific electrical energy consumption per kilogram of chilled air of a conventional and a hybrid system for air conditioning applications. Potential electricity savings depending on ambient conditions are investigated.
Open Absorption dehumidification systems working with low grade heat sources at around 85ยฐC can save up around 80% of the electicity demand in warm and humid climates (๐œ‘ = 0.8). But even in less humid climates (๐œ‘ = 0.4) the potential for electrical energy savings is similarly high in between 65 and 70% almost independently from the ambient temperature. 

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Pages: 12

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Details

  • Original title: Reduction of the electricity consumption of a compression refrigeration system for air conditioning by a preceding thermally driven absorptive air dehumidification system.
  • Record ID : 30031885
  • Languages: English
  • Subject: Technology
  • Source: Proceedings of the 26th IIR International Congress of Refrigeration: Paris , France, August 21-25, 2023.
  • Publication date: 2023/08/21
  • DOI: http://dx.doi.org/10.18462/iir.icr.2023.0859

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