ECODRY 3DK – the industrial standard in adiabatic cooling

ECODRY 3DK is a patented adiabatic system developed as a direct replacement for conventional cooling towers. Installed outdoors, it removes process heat in a closed loop—delivering improved cooling performance, significantly lower operating costs and a reduced environmental footprint.

ECODRY 3DK benefits

• Reliable operation with minimal water consumption, even at ambient temperatures up to 50 °C
• Safe winter operation without glycol, down to –40 °C
• Major energy savings thanks to EC brushless axial fans in partial-load operation
• Compact module layout – small footprint on rooftops or platforms
• High reliability with electrical redundancy
• 100% non-ferrous construction – excellent corrosion resistance and long service life

ECODRY 3DK technical features

• Cooling capacity: 50 – 10,000 kW
• Water flow rate: 10 – 2,000 m³/h
• Maximum process water temperature: 30/35 °C
• Operation at ambient temperatures up to 50 °C with adiabatic air pre-cooling
• Automatic draining configuration to prevent freezing
• Heat exchangers: copper tubes with aluminium fins and hydrophobic protection
• EC axial fans with DC brushless motors, each individually controlled
• Modular design with factory-prepared stainless manifolds and aluminium access panels

ECODRY 4DK – next generation

ECODRY 4DK is an innovative adiabatic cooler and the latest evolution of the ECODRY 3DK series. It is a centralized closed-loop system designed to fully replace conventional cooling towers and deliver even higher efficiency, with a better carbon footprint and advanced hygiene features.

4DK brings a new level of performance, optimized for long-term savings in water, energy, chemicals and maintenance time. Thanks to robust construction and a compact, functional design, it is ideal for installations with limited space.

ECODRY 4DK benefits

• Higher performance and improved carbon footprint
• Optimized for long-term savings in water, energy, chemicals and maintenance time
• Compact design with improved capacity/footprint ratio – up to 40% less space required between units
• Full modularity – easy expansion as production grows
• Glycol-free winter operation down to –30 °C thanks to self-draining configuration
• Minimal need for chemical water treatment
• Health & safety-oriented design

ECODRY 4DK technical features

• High-performance, low pressure-drop heat exchangers (copper/aluminium)
• Self-draining heat exchanger configuration for glycol-free operation in cold climates
• Patented adiabatic chamber with CoolPad elements and high-efficiency spray nozzles
• Operating modes: Dry – Adiabatic – Hybrid (Adiabatic + Booster), with automatic switching
• Advanced water consumption management – evaporation based on actual system load
• Automatic process pump control and monitoring of self-draining cycles
• SS304L stainless-steel construction, with optional protective treatments for aggressive environments
• Digital control and system logic management – Netgel 3PR 4.0 (Industry 4.0 ready)

ECODRY LDK Large – a new era of high-capacity adiabatic coolers

ECODRY LDK Large represents a completely new generation of Frigel adiabatic systems, developed to meet the highest demands of large industrial plants while maximizing efficiency and sustainability.

LDK delivers enhanced heat transfer efficiency, a minimal water footprint and significantly reduced costs for energy, chemicals and maintenance—making it a natural alternative to conventional cooling towers.

ECODRY LDK Large benefits

• A natural choice versus evaporative cooling towers thanks to more efficient heat rejection and lower costs
• Near-zero water consumption – evaporation is used only during peak ambient conditions
• Always clean process water – closed loop, no stagnation and reduced scaling risk
• Constant heat transfer efficiency without fouling on heat exchanger surfaces
• No continuous chemical treatment required – basic water preparation and periodic monitoring
• Very low maintenance costs – 80–95% savings compared to conventional cooling towers
• No legionella risk – the system fully dries daily and runs in dry mode for a certain number of hours

ECODRY LDK technical features

• Water savings: water footprint reduction up to –95%
• Energy savings: operating cost reduction up to –40%
• Clean process water: closed loop, minimal contamination and reduced chemical use
• Free cooling capability – automatic replacement or unloading of chillers during winter
• Chemical and water treatment cost savings up to –95%
• High flexibility – easy system expansion and upgrade from Dry/Spray/Adiabatic to Hybrid configurations
• High capacity density – up to 45% smaller footprint thanks to optimized air intake
• Glycol-free operation down to –40 °C in extreme climates