Water Cooled Screw Chiller 570-2,070 kW High COP Cooling Tower System
The Maximum Density Solution for Centralized Chiller Plants
When project demands require the highest possible cooling capacity per unit of floor space—such as basement chiller plants in CBD skyscrapers, district cooling stations, or large hospital complexes—the water-cooled screw chiller delivers. With up to 2,070 kW from a single machine, this system provides 2-3 times the capacity density of equivalent air-cooled units. While requiring a condenser water system (cooling tower, pumps, piping), the water-cooled approach is the engineering consultant's preferred solution for applications where space is at a premium and cooling loads are substantial.
For building designers, the water-cooled screw chiller enables compact plant room design. A single 2,000 kW machine occupies approximately the same floor area as two 1,000 kW air-cooled units—without the rooftop space requirement. This is particularly valuable in high-rise buildings where every square meter of basement or mechanical floor space carries significant value.
Key Features Deep Dive
Industry-Leading COP for Water-Cooled Applications
Achieving COP values between 5.0 and 5.9 across the 570-2,070 kW range, this water-cooled screw chiller delivers significantly higher efficiency than air-cooled equivalents. The lower condensing temperature in water-cooled systems (typically 30-35°C from the cooling tower) compared to ambient air temperatures in hot climates (40-55°C) reduces compressor workload and increases COP.
- COP 5.0-5.9 – Best-in-class efficiency for water-cooled screw applications
- Lower annual energy cost – 30-40% less energy than air-cooled equivalents
- Smaller electrical infrastructure – Reduced kW input per cooling ton
- Reduced carbon emissions – Higher COP directly translates to lower Scope 2 emissions
- Favorable lifecycle cost – Energy savings offset higher initial investment in 2-4 years
- Compliant with energy codes – Meets or exceeds ASHRAE 90.1, EN 14511 requirements
High Capacity Density for Compact Plant Rooms
A single water-cooled screw chiller delivers up to 2,070 kW of cooling from a footprint of approximately 4m × 2m. This represents unmatched capacity density compared to equivalent air-cooled installations, which would require significantly more rooftop space plus additional structural support.
- 2,070 kW in ~8 m² footprint – Superior capacity density
- Basement or mechanical floor installation – No rooftop space required
- Fewer units for same total capacity – Simplified plant room layout and piping
- Reduced structural load per point – Concentrated load in designed plant room area
- Architectural flexibility – Plant room can be located in non-premium building areas
- Scalable with parallel units – 2, 3, or 4 machines on common headers for redundancy
Multiple Refrigerant Options for Different Markets
Available with three refrigerant options, this chiller allows engineering consultants to specify based on local market conditions and regulations.
- R134a: Global standard – Best choice for new international projects
- R22: Market-specific – For regions with established R22 service infrastructure
- R407C: Transitional – Drop-in replacement for R22 with lower ozone impact
- Non-flammable (A1 safety class) – All three options meet standard safety requirements
- Flexible specification – Match refrigerant to local market and service availability
- Future compliance path – Migration options available as regulations evolve
T3 55°C Certification with Cooling Tower
Maintaining full T3 55°C certification, this chiller delivers rated capacity even when ambient temperature reaches 55°C. With proper cooling tower design, condenser water temperature remains stable regardless of ambient conditions.
- Stable performance in extreme heat – Cooling tower buffers the chiller from ambient conditions
- T3 55°C certified – Full capacity guaranteed in the harshest climates
- Less ambient sensitivity – Chiller performance independent of outdoor temperature swings
- Proven in Middle East and Africa – Thousands of installations in 50°C+ environments
- Reduced oversizing risk – Stable performance means accurate sizing is achievable
- Extended operating hours – Consistent performance during extreme heat events
Robust Semi-Hermetic Screw Compressors
The semi-hermetic twin screw compressors are designed for a minimum 20-year service life with proper maintenance. The field-serviceable design allows bearing, seal, and valve replacement without full compressor removal.
- Semi-hermetic design – Field-serviceable without full compressor replacement
- 20-year minimum service life – With proper maintenance schedule
- Twin screw configuration – Redundancy within a single machine
- Capacity modulation 25-100% – Stepless slide valve control
- Oil management system – Efficient oil separation and return
- Comprehensive spare parts program – Full parts availability for 20+ years
Cooling Tower System Integration
Designed to work with standard cooling tower systems, this chiller accepts condenser water at 30-35°C (design conditions) and returns it at 35-40°C. Compatible with open-circuit, closed-circuit, or hybrid cooling tower systems.
- Standard cooling tower compatible – Works with all major cooling tower brands
- Design conditions: 30/35°C CW – Standard engineering design parameters
- Open or closed circuit – Match cooling tower type to water quality and climate
- Coordinated BMS control – Chiller and cooling tower optimize together
- Variable speed tower fans – Further system efficiency improvement possible
- Water treatment integration – BMS monitors water quality parameters
Technical Specifications
| Parameter | Value |
|---|
| Cooling Capacity | 570-2,070 kW (single machine) |
| COP Range | 5.0-5.9 |
| Compressor Type | Semi-hermetic twin screw |
| Refrigerant Options | R134a / R22 / R407C |
| Climate Class | T3 – Full capacity at 55°C ambient |
| Capacity Modulation | 25%-100% stepless |
| Voltage | 380-415V/50Hz (other on request) |
| Condenser Water Design | 30/35°C (standard) |
| Certifications | CE, AHRI 550/590 |
| BMS Protocols | Modbus RTU, Modbus TCP/IP, BACnet IP |
| Installation | Indoor (basement/mechanical floor) |
| Warranty | 5 years |
Ideal Applications
CBD high-rise towers
District cooling stations
Large hospitals
Industrial process cooling
Data centers (large)
Airport terminals
Shopping malls (large)
University campuses
Hotels (large-scale)
Government and institutional buildings
Certifications & Standards
CE Certification
AHRI 550/590
ISO 9001/14001/45001
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