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OXYCOM uses water, one of nature’s most powerful refrigerants (R718), to cool air in environment-friendly matter. Evaporating water at a rate of 1 L/h generates 695 W of cooling power, whereas conventional air conditioning systems typically require as much as 250−300 W of electrical power to achieve the same.
OXYCOM developed several evaporative cooling technologies and technology combinations, each with its own applicability region:
|The OXYVAP is a direct evaporative cooling pad, that adiabatically cools air towards its wet bulb temperature, typically achieving a 90% saturation efficiency.
Its modular design enables it to be used for any airflow, while the frontal air velocity is typically 1−3 m/s.
The two-stage OXYVAP is an OXYVAP-based cooling configuration, that uses an additional air-to-water heat exchanger to enhance its performance. Chilled water from the OXYVAP is fed to the heat exchanger to pre-cool outdoor air before it enters the OXYVAP pad, that is then fed with water returning from the heat exchanger.
|The OXYCELL is a counter-flow indirect evaporative heat exchanger in which air in the secondary channel (work air) is adiabatically cooled, hereby extracting heat from air in the primary channel (process air). This principle is referred to as Indirect Evaporative Cooling (IEC).|
Dew Point Cooling (DPC) is a special application of the OXYCELL IEC, in which part of the cooled primary air (typically 35−40%) is branched off and used as secondary inlet air, where it is cooled adiabatically, hereby extracting heat from the primary air stream. Ideally, primary air can be cooled down to its dew point temperature, while maintaining a constant absolute humidity.
The hybrid configuration is based on the OXYCELL IEC. In practice, the OXYCELL IEC cools outdoor air (flowing through the primary channel) down to about a degree above the physical limit, i.e. the wet bulb temperature of the secondary inlet air, while maintaining a constant absolute humidity.
In conventional air conditioning technology, a compressor is used to compress the gaseous coolant before it loses its heat by condensation in the condenser coil.