The abilities of the CCAC and LHC are combined for air conditioning and dehumidification purposes. Typical applications are warehouses in which humidity must be lower than 50% in order to resist corrosion. In addition, temperatures must be kept within convenient limits through air conditioning.There are basically two different methods for dehumidification:
1. Mechanical heat pumps, or air conditioners, that are commonly used when humidity loads are low and relative humidity is high.Dehumidification by heat pumps requires cooling the air to temperatures that are considerably below the dew point. Desiccants convert the latent heat to sensible heat and therefore heat the air.
2. Absorption machine, which uses liquid or solid desiccants.
AGAM Dehumidifier Air Conditioner combines the mechanical heat pump with the absorption machine. This combination enables the unique feature of dehumidifying while cooling the air, as well as a huge reduction of the cost and energy requirement.
AGAM Dehumidifier Air Conditioner combines vapor absorption on lithium bromide brine and conventional heat pump. It uses advanced direct contact cold brine-to-air heat exchangers as vapor condenser and warm brine-to-air heat exchangers as brine evaporator.
R22 is used as a refrigerant and efficient scroll compressors are used for the heat pumps. The heat of condensation on the cold brine is absorbed by the refrigerant evaporator while heat of refrigerant condensation is removed by warm brine through the condenser to the ambient air.
The unit design is covered by US patent 6,018,954, Israeli patent 113446.
Summer:
Ambient conditions:
Dry bulb temperature 35˚C
Relative humidity 43%
Inside conditions:
Dry bulb temperature 30˚C
Relative humidity 45%
Dehumidifier performance:
Heat removal 22 kW
Vapor removal 16 kg/hr
Power input 6.5 kW.
Winter:
In order to keep relative humidity low, and to elevate the temperature inside, AGAM units operate as latent heat converters.
The heat of regeneration (water removal from brine) is recovered and returned into the enclosure together with the heat of vapor condensation.
Ambient conditions:
Dry bulb temperature 10˚C
Relative humidity 80%
Inside conditions:
Dry bulb temperature 15˚C
Relative humidity 45%
Dehumidifier performance:
Heat addition: 9.5 kW
Vapor removal: 5kg/hr
Power input 6.5 kW.
Control:
There are two control units for each system, one inside the enclosure and one outside. The inside unit stops operation when humidity is below 40%. The outside unit controls the speed of ambient air blower.
To keep brine concentration in high humidity, the volumetric airflow will be low in high humidity and high in low humidity.
Unit length 1550 mm
Unit Width 1024 mm