Chilled Water Air Cooler (SP)
SP Series Chiller Water Air Cooler
Pre-treatment equipment that uses chilled water to lower the compressed air temperature upstream of a desiccant dryer. A lower inlet temperature increases the moisture adsorption capacity of the desiccant, improving the dew point and reducing regeneration heater power.
Pre-treatment that lowers the temperature ahead of the desiccant dryer
The SP series is pre-treatment equipment that uses chiller water (chilled water) to lower the compressed air temperature.
Installed upstream of a desiccant dryer to reduce the inlet temperature, it increases the moisture adsorption capacity of the desiccant, improving the dew point and reducing regeneration heater power.
For activated alumina, comparing inlet temperatures of 40 °C and 20 °C, the adsorption capacity differs by up to 13% (at 7 barG, 100% RH).
In other words, simply cooling the air upstream greatly reduces the load on the desiccant dryer.
Key features
High-efficiency stainless steel shell-and-tube design
Optional reheater
Design proposals based on chilled water and air temperatures
Optional chilled water control valve for outlet temperature control that accounts for the inlet temperature
Standard conditions
Inlet air pressure | 7 barg (STD) |
Inlet air temperature | 40 ~ 60℃ |
Outlet air temperature | 15 ~ 25℃ |
Chilled water temperature | 4 ~ 10℃ |
Chilled water cooler or refrigerated dryer: which to choose
Item | Chilled water cooler (temperature-reducing pre-treatment) | Refrigerated dryer (moisture removal) |
|---|---|---|
Configuration | Cools compressed air with chilled water · requires a chilled water supply/cooling water system and chilled water piping | Built-in refrigeration system using refrigerant · standalone operation |
Capital cost | Lower for the cooler itself (no power supply of its own) · additional construction cost if no chilled water infrastructure exists | Higher for the unit itself · no separate chilled water infrastructure or connecting piping needed |
Operating cost | Lower for the cooler itself · power for chilled water pumps, chiller and cooling equipment must be considered | Power for the built-in refrigeration compressor and condenser (cooling water pump) |
Operation | Cooling tower, chiller, chilled water pumps, piping and water treatment must be managed · efficiency falls with piping (insulation) distance | Relatively simple (consumable replacement and the like) · easy to manage separately |
Recommended | When chilled water infrastructure with spare capacity is available nearby · dew point depends on the chilled water temperature | When dry air with a pressure dew point of 4–10 °C is required |
Sales inquiries
Tell us your chilled water conditions and the specification of your desiccant dryer, and we will first review the improvement that pre-treatment would bring.
