Midea Water Cooled Screw Chillers R134a R513A 90-550RT High-Efficiency Systems
Engineered for maximum efficiency in large-scale commercial and industrial applications, the Midea Water Cooled Screw Chiller series combines industrial-grade engineering with commercial practicality. Available in SHWE and SCWG series configurations utilizing R134a or R513A refrigerants, these chillers span capacities from 90 to 550RT, meeting the rigorous demands of expansive commercial and industrial operations.
The semi-hermetic twin-rotor screw compressors feature precision-engineered asymmetric rotor profiles—five-tooth engaging six-tooth geometry at micron-level tolerance. SKF bearings guarantee 50,000 hours of continuous operation, while variable speed drive configurations enable stepless capacity modulation through advanced sliding valve technology.
With COP values achieving 5.55 and IPLV performance reaching 7.26, these chillers demonstrate exceptional efficiency under both full-load and part-load conditions. Flooded evaporators featuring liquid distribution and baffle plate technology optimize thermal transfer, while optimized condensers with dual-side enhanced tubes deliver superior cooling performance.
Core Features
Precision-Engineered Screw Compressors
The semi-hermetic twin-rotor screw compressors feature asymmetric rotor profiles—five-tooth/six-tooth geometry—engineered to micron-level precision. SKF bearings ensure 50,000 hours of dependable continuous operation, providing long-term reliability for demanding applications.
Variable Speed Drive Configurations
Available in VSD full-liquid (SCWG** _EV) and fixed-speed full-liquid (SCWG_** E) configurations. VSD variants provide stepless capacity modulation, optimizing energy consumption across diverse loading conditions.
Flooded Evaporator Technology
Flooded evaporators featuring liquid distribution plates and baffle plates ensure optimal refrigerant distribution. This engineering approach maximizes thermal transfer efficiency while maintaining stable leaving water temperature regulation.
Optimized Condenser Engineering
Condensers feature dual-side enhanced tube technology, integrated oil separators, and dedicated subcooling sections. This comprehensive optimization delivers superior heat rejection performance and enhanced system efficiency.
Three-Tier Oil Separation Architecture
The advanced oil management system incorporates three-tier oil separation technology. Combined with dual return oil systems and Venturi ejector technology, this architecture ensures dependable compressor lubrication across all operating conditions.
Differential Pressure Oil Delivery
The system utilizes differential pressure for oil delivery, eliminating external oil pump requirements. This passive oil management approach enhances reliability while reducing maintenance complexity.
Extended Operational Flexibility
Leaving water temperature operation spans 5°C to 15°C, with cooling water entering temperatures from 19°C to 50°C. This flexibility enables adaptation to diverse system configurations and application requirements.
Comprehensive Protection Framework
Over 20 protection functions ensure safe and dependable operation. The integrated 7-inch touchscreen interface provides intuitive monitoring and control, while RS485/Modbus-RTU connectivity enables seamless building management system integration.
Quiet Operation Performance
Part-load noise levels as low as 65dB(A) ensure unobtrusive operation for noise-sensitive environments. This acoustic performance makes the chillers appropriate for installations near occupied spaces.
Application Scenarios
Large Commercial Venues
Shopping centers, sports facilities, and convention complexes benefit from high-capacity output and exceptional part-load efficiency. Modular configurations accommodate varying cooling demands across different functional zones.
Industrial Manufacturing
Manufacturing facilities, power generation installations, and industrial process cooling applications leverage the rugged construction and dependable performance. High COP values translate to reduced operational expenditures for energy-intensive operations.
Hospitality and Medical Services
Large hotels, hospitals, and healthcare facilities require dependable round-the-clock cooling with outstanding efficiency. Proven reliability and comprehensive protection features ensure continuous operation for critical service applications.
Certifications & Standards
- AHRI Certification – Validated performance for 5C and 17C SCWG configurations
- CE Marking – Demonstrates European safety and environmental regulatory compliance
- ISO 9001 Certification – Confirms implementation of quality management system standards
- ISO 14001 Certification – Confirms implementation of environmental management system standards
- LEED-Aligned – Contributes toward Leadership in Energy and Environmental Design certification credits
Technical Specifications
| Parameter |
Specification |
| Refrigerant |
R134a (SHWE/SCWG), R513A (SCWG 17C) |
| Cooling Capacity |
90-550 RT |
| COP Range |
5.36-5.55 |
| IPLV Range |
6.83-7.26 |
| Leaving Water Temp |
5°C to 15°C |
| Cooling Water Inlet |
19°C to 50°C |
| Max Noise (Part-load) |
65 dB(A) |
| Voltage |
380-415V/3Ph/50-60Hz |
| Control |
7" Touch Screen, RS485/Modbus-RTU |
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