Water-Cooled Inverter Screw Chiller

High Energy Efficiency

Stable and Reliable Operation

High-Precision Control

R134A Refrigerant

Ultra-Efficient Inverter Screw Chiller

The TCL Ultra-Efficient Inverter Screw Chiller delivers comprehensive breakthroughs across energy efficiency, reliability, and intelligence. With IPLV up to 9.83 — combined with energy-saving technology. Dual oil-return and all-round protection design ensure stable and reliable operation.

Ultra Efficiency

· Unit IPLV Up to 9.83

· Combining inverter twin-screw and wide-load permanent magnet motor, with real-time optimization algorithms for top-tier efficiency

Reliable Operation

· Advanced oil-circuit control system for precise oil control and stable operation

·Multi-layer protection design that comprehensively avoids shutdown risk

·Uses eco-friendly R134a refrigerant for higher efficiency and more stable operation

Product Naming Rule

Applications

Commercial & Finance

Hotels & Apartments

Industrial Manufacturing

Public Buildings

Hospitals

Rail Transit

High Efficiency Oil Separator

· Stable oil supply with excellent

airtightness

· Oil separation efficiency over 99%

·Reliable even under

high-temperature conditions

Integrated Control Cabinet

·On-board integrated inverter · Microcomputer control system

Twin-Screw Inverter Compressor

·New twin-screw rotors with reduced clearance and higher efficiency · Permanent magnet synchronous inverter motor (5% efficiency gain) · Variable volume ratio for efficient operation across all conditions · Unique suction filter increasing suction volume by 40%

Inlet and Outlet on the Same Side

·Easy installation, cleaning, and maintenance

High-Efficiency Condenser

· Double-side enhanced condenser tubes for higher heat-transfer efficiency

Electronic Expansion Valve

·Fast adjustment with wide capacity-regulation range · PID control algorithm for precise temperature control

Flooded Evaporator

·Ultra-high-efficiency evaporator tubes with outstanding heat-transfer

· Innovative tube layout for small

heat-transfer temperature difference

· Easy maintenance and simple upkeep

load rate %

motor efficiency %

Unit IPLV up to 9.83

Energy Savings

The TCL Ultra-Efficient Inverter Screw Chiller has been certified by authoritative third-party testing organizations. With IPLV up to 9.83 — it continuously reduces energy consumption under both routine and full-load operation, helping enterprises substantially cut operating costs, enhance green competitiveness, and simultaneously achieve economic and environmental benefits.

Twin-Screw Compressor

The unit uses a high-efficiency twin-screw compressor that matches user demand in real time, automatically adjusting compressor output so the machine maintains the best efficiency match and achieves an optimal energy-efficiency ratio, saving operating costs.

① Asymmetric Tooth-Profile Twin-Screw

Integrally formed4:6 screw rotors: With high mating precision and small clearance, improving volumetric efficiency and ensuring smooth operation. The integral design provides higher rotor hardness and higher edge line speed, shortening the compression stroke for higher efficiency.

② Inverter Modulation

Stepless capacity modulation with fast acceleration/deceleration and high efficiency, automatically adjusting cooling output.

Variable Volume Ratio (Vi)

Stepless control dynamically matches varying operating conditions so the compression process always approaches the optimum state. This eliminates over-compression at lightload (wasted power and soaring electricity costs) and under-compression at heavy load (low efficiency and poor performance).

④ Oversized Suction Filter

A high-precision filter element efficiently removes oil-circuit impurities, protecting compressor life, stabilizing suction pressure, and reducing energy consumption.

The new low-pressure-drop suction-side flow path is sturdy, has low pressure loss, and provides smooth suction — avoiding turbulence and excessive pressure drop, and increasing suction volume by 40%.

Wide-Load Permanent Magnet Synchronous Inverter Motor

Permanent-magnet excitation eliminates excitation loss; rotor speed synchronizes with supply frequency, reducing stator current and copper loss; rated efficiency reaches 97.5%. Combined with wide-load technology, the unit maintains ultra-high efficiency under any operating condition, providing significant electricity savings.

Quick response, precise control: Works seamlessly with variable frequency drives. High-precision recognition and rapid speed tracking control algorithms ensure efficient and reliable operation at full load, with full-load efficiency exceeding95%.

Vi Optimization Inverter Control Technology

Proprietary intelligent volume-ratio (Vi) optimization technology — gives the compressor a "smart brain,"delivering a qualitative leap in cooling performance and energy efficiency. By deeply integrating the characteristic curves of the compressor, inverter, and motor, the technology fully exploits the performance and reliability of the inverter twin-screw compressor. Across all operating phases — startup, loading, unloading, and shutdown — the slide valve and rotational speed coordinate intelligently to balance smoothness and efficiency, supplying just the right amount of cooling capacity for peak performance around the clock.

Startup

The motor starts at low speed and the slide valve quickly moves to the mid position to avoid inefficient operating conditions.

Loading

As motor speed rises, the system automatically searches for the optimal Vi position. Built-in algorithms analyze operating parameters in real time and simultaneously optimize slide valve position and motor speed, prioritizing slide valve adjustment while precisely matching motor speed to load demand.

Unloading

As motor speed decreases, the slide valve synchronously moves to the optimal Vi position. The algorithm continuously and dynamically adjusts both slide valve position and speed, prioritizing slide valve reduction and matching with motor speed for precise capacity modulation.

Shutdown

Motor speed is gradually reduced and the slide valve moves to its minimum position; once the motor speed reaches the set threshold, the system shuts down smoothly.

High-Efficiency Flooded Evaporator

Innovative tube layout: Refrigerant is distributed radially at the bottom of the evaporator through a distributor; heat-exchange tubes are fully immersed in refrigerant for enhanced heat-absorption capacity, ensuring fully uniform evaporation in all tubes and improving heat-transfer efficiency

Double-side enhanced tubes: Surfaces specifically engineered for different heat-transfer mechanisms and refrigerant media, combined with fluid simulation co-design, enable more efficient heat exchange with less energy and less refrigerant.

High-Efficiency Subcooling Condenser

Optimized subcooler design: Reduces subcooler pressure loss and significantly improves subcooling, eliminating ineffective heat exchange and improving overall unit efficiency; uniform refrigerant gas distribution avoids dead zones in heat exchange, ensuring every unit of cooling capacity is fully utilized.

Removable end covers: Allow easy access for mechanical cleaning of the water-side tube bundles, resulting in low maintenance cost.

High-Precision Throttling Electronic Expansion Valve

3800-step high-precision expansion valve modulates evaporator refrigerant flow with fast response, rapid adjustment, and a wide capacity-modulation range.

Combined with advanced PID control algorithms, it precisely regulates refrigerant flow, achieving high water-temperature accuracy and efficient, energy-saving system operation

Safe and Reliable Operation

Reliable Oil Circuit System

Level 1:

High-Efficiency Oil Separator

Dual Oil-Return Technology

Provides a stable, efficient oil supply, ensuring excellent lubrication of every moving part of the compressor.

· Combines oil-separator return with cross re-injection return: high-pressure gas cross re-injection achieves oil return, eliminating the risk of oil pooling in the evaporator and ensuring safe, reliable operation.

Level 2: Ejector-Pump Return
High-pressure oil from the secondary separator ejects approximately O.1% of the oil pooled in the evaporator back into the compressor.

· An intelligent oil heater automatically regulates oil temperature according to operating state, maintaining excellent oil-film properties for reliable lubrication.

· External-type oil filter design allows quick replacement and maintenance.

Smooth Startup

· Inverter-driven startup produces an extremely smooth current rise during motor startup. Compared with star-delta startup, inverter startup current is significantly lower, completely eliminating the inrush current that can occur with conventional startup.

. The smooth start reduces the additional stress and wear that current surges impose on motor windings and bearings, fundamentally ensuring stable operation and substantially extending motor service life.

Safety Protection

Multi protection technology comprehensively protects the unit and ensures stable operation under all conditions.

Power failure protection

Motor temperature protection

Exhaust temperature protection

Water flowprotection

Chilled water antifreeze protection

Oil filter differential pressure protection

Protection against excessively low water temperature from the evaporator

High and low temperature protection for condenser water inlet

Compressor internal protection switch

Low exhaust superheat protection

Prompt for excessive load on the unit
Electronic expansion valve fault protection

R134a — High-Efficiency, Zero ODP Refrigerant

· R134a delivers high cooling efficiency, has no ozone-depletion impact, and offers stable, reliable performance.

. Combined with flooded evaporation, itsubstantially improves heat-exchange efficiency while reducing refrigerant charge — delivering reliable cooling with greater environmental benefits and providing a solid foundation for long-term stable operation.