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LDDX: A High Efficiency Air Conditioner for DOD Buildings

Descriptive Note:

Technical Report,01 Mar 2013,30 Jun 2017

Corporate Author:

AIL Research Hopewell United States

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Conventional cooling systems are inefficient dehumidifiers, often supplying too much temperature reduction i.e., sensible cooling when supplying adequate dehumidification i.e., latent cooling. Two approaches to more efficient indoor humidity control were field tested in this project. Both approaches integrated a liquid desiccant LD into a compressor-based DX air conditioner to more than double the dehumidification provided by the air conditioner. At AHRI A rating conditions, the LDDX prototypes that were tested at Picatinny Arsenal 3-ton and Fort Belvoir 5-ton supplied air at dewpoints of 46.5 F and 50 F, respectively. Both prototypes demonstrated the capability to adjust the Sensible Heat Ratio SHR of the supplied cooling by controlling their desiccant flows. The Fort Belvoir prototype was the more efficient of the two operating at an Energy Efficiency Ratio EER of 11.46 and SHR of 0.403. Both prototypes operated without the entrainment of liquid desiccant droplets in the process air.

Subject Categories:

  • Air Conditioning, Heating, Lighting and Ventilating

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