PH-97-11-2 -- Novel Desiccant Cooling System Using Indirect Evaporative Cooler PDF

Describes a cooling system developed using a desiccant wheel in conjunction with a compact indirect evaporative cooler and a small air to air heat exchanger. The system eliminates the need for deep dehumidification by the desiccant wheel and provides 25% to 35% ventilation air to the conditioned space. Using a 0.68 m (27 in) diameter by 0.2 m (8 in) deep type 1M desiccant wheel regenerated at 175degC (347degF), 15.0 kW (4.3 tons) of cooling were achieved with a thermal coefficient of performance (COP) of 0.72. With the addition of a direct evaporative cooler, humidity control over a broad range can be offered by the system. States equipment under development is expected to exceed a gross cooling COP of 0.9.

KEYWORDS: year 1997, Desiccants, cooling, evaporative cooling, coefficient of performance, ventilation, air conditioning, dehumidifying