Hybrid Dehumidification System
Condensation + Desiccant Adsorption — Two Technologies in One Unit
A custom-engineered model based on the AD series silica gel rotor dehumidifiers, configured with DX (direct expansion — refrigerant-based) or chilled water coils for pre-cooling, frost protection, pre-heating, post-cooling or post-heating according to project requirements. It is called "Hybrid" because it combines both condensation-based and desiccant rotor-based dehumidification in a single unit.
When a Single Technology Is Not Enough
When a standard desiccant dehumidifier cannot handle the moisture load alone or when very low dew points are targeted, the process air must be pre-cooled before entering the rotor to remove initial moisture. The hybrid system does exactly this: condensation-based dehumidification via cooling coil (first stage) followed by adsorption-based deep dehumidification via silica gel rotor (second stage). The result is two different dehumidification technologies working together in a single unit housing.
Process air is cooled by chilled water or DX coil; moisture condenses and drains away. At this stage, relative humidity approaches 100% and absolute humidity drops significantly.
Pre-dehumidified air enters the silica gel rotor. The rotor adsorbs remaining moisture to reach the target dew point. Regeneration air continuously reactivates the rotor.
Depending on the application, a post-cooling or post-heating coil is added to adjust the temperature of the dry air. This provides both humidity and temperature control.
Project-Configurable Coil Selections
Each hybrid system is equipped with one or more of the following coil options based on the facility's existing infrastructure and process requirements.
Chilled water or DX coil for first-stage condensation-based dehumidification by cooling the process air. Reduces the load on the rotor in high-humidity environments.
Used to lower the temperature of dry air exiting the rotor. Critical for processes requiring precise temperature control.
Prevents process air from dropping below freezing point in cold climate conditions. Provides frost protection.
Heats dry air to the target temperature. Provides comfort or process temperature, especially for low-temperature operations.
Refrigerant-based (R410A / R134a) direct expansion system. No external chiller required; compact installation. Operates with an integrated compressor unit.
Control system that prevents ice formation on the evaporator or cooling coil in low-temperature applications. Operates with defrost cycle or bypass damper.
AD 3000E — Chilled Water Hybrid System
The example below shows a hybrid configuration of the AD 3000E model equipped with chilled water pre-cooler and post-cooler coils.
Materials & Coil Details
AISI 304 stainless steel and aluminium profile frame with sandwich panels. Standard AD series housing extended with coil compartments.
High-efficiency silica gel rotor with a honeycomb structure of corrugated heat-resistant sheets. Operates undamaged in saturated air conditions.
Copper tube, aluminium fin construction. 2" or 1-1/2" connections for chilled water coils. Left-side connection (standard).
DropSTOP droplet eliminator system on the pre-cooler coil; prevents water carryover and guarantees dry air delivery to the rotor.
PLC control with touch-screen display; coil valve modulation, regeneration temperature regulation, alarm management and BMS integration.
Where Is the Hybrid System Preferred?
Live psychrometric values for your location.
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