Holtop Falling Film Water-Cooled Screw Chiller/Heat Pump

Efficient Cooling & Heating with Wide Application Range

Holtop introduces its new Falling Film Water-Cooled Screw Chiller/Heat Pump, offering cooling capacities from 85RT to 690RT. The unit is designed to support central air conditioning systems in commercial buildings, hospitals, hotels, stadiums, and industrial facilities with precise temperature control requirements.

Product Highlights:

• Screw compressor with stable performance across different load conditions

• Falling film evaporator design to enhance heat transfer and reduce refrigerant usage

• Multi-level oil return system for reliable compressor operation

• Electronically controlled expansion valve with fine-tuned flow adjustment

• Condenser structure optimized for improved thermal performance

• Full-range safety protection features

• Intelligent control system for real-time monitoring and adjustments

Products Features

1. Screw Compressor

The unit is equipped with a semi-hermetic screw compressor using refined screw profile and tight machining tolerance. This ensures efficient compression and long-term operational stability. The capacity can be adjusted dynamically based on demand, which helps reduce energy consumption.

2. Falling Film Evaporator

A falling film type evaporator is used to create a thin, evenly distributed liquid film over heat exchange tubes. This setup increases the evaporator’s efficiency while also reducing the total refrigerant charge required in the system.

3. Oil Return Design

A three-level oil return system is implemented to maintain lubrication and keep excess oil from circulating into the heat exchange section. This enhances both reliability and heat exchange performance.

4. Electronic Expansion Valve

A step motor-driven expansion valve allows precise refrigerant control. It works in coordination with system sensors and temperature monitoring algorithms to maintain system balance and ensure proper refrigerant supply under all conditions.

5. Condenser with Subcooling Design

The condenser features enhanced tubes and a layout that supports better fluid distribution and heat transfer. A built-in subcooling section keeps refrigerant subcooled by more than 5°C, helping to improve system efficiency.

6. Integrated Safety System

Protection functions include:

• Freeze protection

• No water flow detection

• High and low pressure alarms

• Overcurrent protection

• Power phase failure monitoring

• Discharge temperature control

• Sensor failure alerts

These features ensure safe operation even under changing or unstable working conditions.

7. Control System

A microcontroller-based system provides:

• Real-time data monitoring

• Fault detection and notification

• Remote control capabilities

The unit maintains consistent operation through sensor feedback and control logic.

Built for Energy Efficiency and Long-Term Use

The Holtop Falling Film Water-Cooled Screw Chiller/Heat Pump is aligned with the increasing demand for energy-efficient HVAC solutions. Its design combines heat transfer effectiveness, system stability, and smart control, making it suitable for projects aiming to reduce energy costs and meet carbon reduction targets.