The DuHybrid air-conditioning system is powered by solar thermal energy or electricity to reduce the energy required for cooling. The system combines desiccant dehumidification with evaporative or geothermal cooling to eliminate the need for conventional mechanical cooling. It uses solar thermal energy when available and automatically switches to electric power when needed. The DuHybrid system can also be integrated with a co-generation system and can be powered by other renewable energy sources or waste heat. The system operates in one of two modes. The renewable energy mode is the default mode of operation. Based on the application, in this mode the unit can generate over 20 tons of refrigeration of cooling and dehumidification using renewable energy sources such as solar thermal and geothermal water. In the electric mode of operation an embedded compressor is activated to enable efficient cooling and dehumidification by using the waste heat of the compressor as an internal energy source.

Ducool, PO Box 403488, Miami Beach, FL; 33140; (201) 541-4141; www.ducool.com.