Hybrid dry cooler
Applications and characteristics
- For outside installation
- In summer use of evaporating heat of water and in winter cooling capacity in dry mode
- High nominal output by high-efficient V-shaped arrangement of the heat exchangers, favourable if space is limited
- Preferably water-glycol-mixture
- Water inlet temperature to max. 90°C (safe below steam range)
- Ambient temperatures from -30 to +60°C
- Very low water and electrical energy needs
- High switching points for dry cooling (ca. 18 °C)
- Applications in industry for process cooling and building technology of air-conditioning systems
- Interconnected operation with cooling towers or chillers
- For cooling systems that operate in an atmospheric closed cooling water system, no pollution of the coolant
Design
- Stainless steel structure
- V-shape arranged heat exchanger as lamella package construction with easy cleanable lamella from aluminium with hydrophilic coating; inner pipes from cooper
- Stainless steel drip pan under re-cooler collects rain or surplus sprayed water and discharges this to the drain point
- High-performing low-pressure spraying system
- Use of osmosis water or water of sufficient quality (conductivity less than 100 µS/cm) for wetting the lamella required (not supplied)
- Use of energy-efficient fan types; low-noise and low-maintenance
- Ventilatoren stufenlos drehzahlregelbar
Mode of action
A special design is the so-called hybrid cooler. For the hybrid cooling, the heat can dissipate to the environment in both, a sensitive way (by heating of the air) and a latent way (as evaporated water). To obtain a coolant temperature lower than the dry air temperature, the dry coolers are wetted with water.