National Renewable Energy Laboratory
Innovation for Our Energy Future
A Zero Carryover Liquid-Desiccant Air Conditioner for Solar Applications Preprint
AIL Research, Inc.
NREL/CP-550-39798 July 2006
S. Slayzak and E. Kozubal
National Renewable Energy Laboratory
To be presented at ASME International Solar Energy Conference (ISEC2006) Denver, Colorado July 8–13, 2006
NREL is operated by Midwest Research Institute ● Battelle
Contract No. DE-AC36-99-GO10337
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Proceedings of ISEC2006 ASME International Solar Energy Conference July 8-13, 2006, Denver, CO
A ZERO CARRYOVER LIQUID-DESICCANT AIR CONDITIONER FOR SOLAR APPLICATIONS ANDREW LOWENSTEIN AIL RESEARCH, INC. PRINCETON, NJ firstname.lastname@example.org STEVEN SLAYZAK AND ERIC KOZUBAL NATIONAL RENEWABLE ENERGY LABORATORY GOLDEN, CO
ABSTRACT A novel liquid-desiccant air conditioner that dries and cools building supply air has been successfully designed, built, and tested. The new air conditioner will transform the use of directcontact liquid-desiccant systems in HVAC applications, improving comfort and indoor air quality, as well as providing energy-efficient humidity control Liquid-desiccant conditioners and regenerators are traditionally implemented as adiabatic beds of contact media that are highly flooded with desiccant. The possibility of droplet carryover into the supply air has limited the sale of these systems in most HVAC applications. The characteristic of the new conditioner and regenerator that distinguishes them from conventional ones is their very low flows of liquid desiccant. Whereas a conventional conditioner operates typically at between 10 and 15 gpm (630 and 946 ml/s) of desiccant per 1000 cfm (0.47 m3/s) of process air, the new conditioner operates at 0.5 gpm (32 ml/s) per 1000 cfm (0.47 m3/s). At these low flooding rates, the supply air will not entrain droplets of liquid...