Water-cooled screw unit

  • Single cooling capacity: 300-2800KW
  • Wide range of uses: The unit is suitable for use in office buildings, hotels, hotels, hospitals, auditoriums, schools and other places, and can provide process chilled water for textile, chemical, food, electronics, scientific research and other departments.
  • Excellent performance: The main engine operates safely and reliably, with complete intelligent protection and a service life of up to 100,000 hours; the unit can automatically adjust the number of compressors in operation according to load changes, with significant energy-saving functions
  • Powerful: the unit has compact structure, small size and light weight

Core Advantages

Efficient and Energy-Saving

  • Depending on the working principle of different containers, copper tubes of different shapes and materials are used.
  • The evaporator adopts the new tube-E type, and the condenser uses the new tube-C type, which significantly increases the heat transfer coefficient and the heat transfer area..
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Efficient and Energy-Savingcontrol

High efficiency and energy saving

High efficiency and low noise

High Cooling Efficiency

Adaptive defrost effect

Efficiency and Stability

  • high-efficiency copper tubes are used throughout. The external threaded design of the evaporator tubes increases the vaporization nuclei required for nucleate boiling, improving the heat transfer efficiency outside the tubes.
  • Inside the tubes, the ridged design not only increases the heat transfer surface area but also creates secondary turbulent flow, enhancing the internal heat transfer efficiency.

High efficiency and energy saving

  • Adopt advanced frequency conversion technology to reduce energy consumption, save operating costs, and ensure long-term use is more economical.
  • Automatically adjust power output according to indoor temperature changes, reduce unnecessary power waste, and be environmentally friendly and energy-saving.

Reducing Maintenance Costs

  • Its simple structure and high efficiency make it more energy-efficient than piston units, reducing energy consumption and operating costs over time. The water-cooled system also improves heat dissipation, lowers compressor load, and enhances energy efficiency.
  • Its simple structure and lack of a complex lubrication system reduce wear and failure rates, resulting in fewer repairs and lower maintenance costs. The long lifespan of screw compressors also minimizes the need for frequent replacements.

High Cooling Efficiency

  • Water-cooled units use water as the cooling medium, which has a higher specific heat capacity than air, making the system more efficient at removing heat. This method is ideal for large buildings and industrial applications, maintaining stable performance even under heavy loads.
  • The screw compressor’s design enables stable operation under heavy loads. Unlike piston compressors, it compresses gas smoothly, minimizing energy loss and heat generation. Its high efficiency and low temperature rise, combined with effective water cooling, significantly enhance the unit’s overall cooling efficiency.

AI adaptive defrosting effect

  • Intelligent adaptive defrosting technology can automatically start the defrosting function according to the external environment to ensure the normal operation of the equipment.
  • Reduce the frequency of manual operation, automatically adjust the defrosting mode, avoid energy efficiency reduction caused by frost, and ensure the continuous and efficient operation of the system.

Product Specifications

Product Specification Details Product Specification Details
Heating Power 6.0 kW Energy Efficiency Rating A++
Refrigerant Type R410A Applicable Area 50-150㎡
Power Supply Voltage 220V / 50Hz Noise Level ≤25 dB
Dual Inverter Technology Supported Smart Temperature Control Supported
Remote Control Mobile App Remote Control Auto Defrost Function Supported
Operating Temp Range -15℃ to 45℃ Weight 40 kg
Dimensions (L x W x H) 850mm x 300mm x 650mm Installation Method Ceiling / Wall Mounted

Water-cooled screw unit Feature and Application：

High Efficiency:

Water-cooled screw units utilize water as a cooling medium, which has a high specific heat capacity. This allows them to absorb and dissipate heat more effectively than air-cooled systems. As a result, these units maintain optimal operating temperatures, reducing energy consumption and enhancing overall system efficiency. The ability to operate efficiently under varying loads helps lower energy costs significantly.

Stable Operation:

The design of water-cooled screw unit allows for continuous and smooth gas compression without the start-stop cycles typical of piston compressors. This stability is crucial in applications requiring consistent pressure and flow rates. The screw design also minimizes vibrations and mechanical stress, contributing to longer equipment life and reliable performance even under heavy loads.

Low Temperature Rise:

Water-cooled screw unit removes excess heat generated during operation, keeping the temperature rise within optimal limits. This not only improves the efficiency of the compression process but also helps protect sensitive components from overheating. Lower operating temperatures lead to increased reliability and can extend the lifespan of the compressor and associated equipment.

Improved Environmental Impact:

By using water as a cooling medium instead of refrigerants, Water-cooled screw unit often have a lower environmental impact. They can be designed to use eco-friendly refrigerants, aligning with global initiatives to reduce greenhouse gas emissions and promote sustainable practices.

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Application:

Large Commercial Buildings:

Water-cooled screw units are ideal for air conditioning systems in large office buildings, shopping malls, and hotels. Their high efficiency and capacity make them suitable for handling significant cooling loads, ensuring comfortable indoor environments.

Industrial Processes:

Water-cooled screw units are commonly used in various industrial applications, such as manufacturing plants, food processing facilities, and chemical processing. They provide reliable cooling for equipment and processes that require stable temperature control to maintain product quality and operational efficiency.

Data Centers:

In data centers, maintaining optimal temperature is crucial for preventing overheating of servers and equipment. Water-cooled screw units offer efficient cooling solutions that can effectively manage the heat generated by high-density computing systems, ensuring uninterrupted operation.

Chilled Water Systems:

Water-cooled screw units are often part of chilled water systems used for cooling applications in hospitals, laboratories, and research facilities. They provide reliable and efficient cooling for sensitive equipment, ensuring stable operating conditions.

District Cooling Systems:

Water-cooled screw units are also utilized in district cooling systems, where chilled water is distributed to multiple buildings from a centralized plant. Their efficiency and scalability make them suitable for large urban developments or campuses requiring extensive cooling solutions.

Food and Beverage Industry:

In the food and beverage sector, Water-cooled screw units maintaining specific temperatures is essential for preserving product quality and safety. Water-cooled screw units are used in refrigeration and cooling applications, such as cold storage facilities and processing plants, to ensure optimal conditions.

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 Water-cooled screw unit Details

Compressor:

The heart of the system, the screw compressor module, utilizes twin rotors to compress refrigerant gas smoothly and efficiently. This design minimizes energy loss and vibration, ensuring stable performance even under high loads. Advanced control systems can adjust the compressor speed to optimize energy consumption based on real-time demand.

Heat Exchanger Module:

This module includes a high-efficiency water-cooled heat exchanger, where the refrigerant absorbs heat from the system. The design maximizes heat transfer area and minimizes pressure drops, enhancing overall cooling efficiency. This module is crucial for maintaining optimal operating temperatures and improving system reliability.

Control Panel Module:

The control panel module houses the Water-cooled screw unit‘s intelligent control systems, including programmable logic controllers (PLCs) and user interfaces. This module allows for real-time monitoring, diagnostics, and adjustments to optimize performance and energy use. Features such as remote access and integration with building management systems enhance operational flexibility.

Pump Module:

Water-cooled screw unit includes the circulation pump necessary for moving water through the system. It ensures that water is effectively circulated between the heat exchangers and the cooling load, maintaining efficient heat transfer. The pump module is designed for durability and can be equipped with variable speed drives to match flow rates with system requirements.

Expansion Valve Module:

The expansion valve module regulates the flow of refrigerant into the evaporator, controlling the refrigerant’s pressure and temperature. This ensures that the refrigerant enters the evaporator at the optimal conditions for heat absorption, improving overall efficiency and system performance.

Condensate Drainage Module:

This module manages the drainage of condensate produced during the cooling process. It ensures proper water removal from the system, preventing potential flooding and maintaining operational efficiency. This module is designed to integrate seamlessly with the rest of the system and can include sensors to monitor water levels for proactive maintenance.

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Working Principle:

The water-cooled screw unit compresses low-pressure refrigerant gas using interlocking rotors, raising its pressure and temperature. The high-pressure gas then enters a water-cooled heat exchanger, where it releases heat to circulating water and condenses into a liquid. There are 4 main steps for this equipment.

Compression Stage

The screw compressor uses two interlocking rotors to draw in low-pressure refrigerant gas and compress it, increasing its pressure and temperature.

Cooling Stage:

The high-pressure gas flows into the water-cooled heat exchanger (condenser), where it releases heat to circulating water, which absorbs the heat and is sent to a cooling tower for further cooling.

Evaporation Stage:

The low-pressure, low-temperature refrigerant enters the evaporator, where it absorbs heat from the environment, evaporating back into a gas.

Cycle Continuation:

The gaseous refrigerant returns to the screw compressor, and the cycle repeats, providing stable cooling and effectively managing large thermal loads.

Efficiency and Performance:

water-cooled screw units combine high energy efficiency, advanced control capabilities, and robust design to deliver excellent performance in a wide range of applications. Their effective heat transfer and quiet operation further enhance their suitability for commercial and industrial settings, making them a preferred choice for reliable cooling solutions.

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Frequently asked questions

A water-cooled screw unit is a type of refrigeration system that uses a screw compressor to compress refrigerant gas and a water-cooled heat exchanger to transfer heat. It is designed for high efficiency and reliable cooling, making it suitable for large commercial and industrial applications.

The primary difference lies in the cooling medium. Water-cooled screw units use water to absorb and transfer heat, which allows for better heat exchange and higher efficiency compared to air-cooled units that rely on air for cooling. This makes water-cooled units more effective in managing larger cooling loads.

Key benefits include:

  • High energy efficiency and reduced operating costs.
  • Consistent and reliable cooling performance.
  • Lower noise levels compared to air-cooled systems.
  • Durability and lower maintenance needs due to fewer moving parts and a robust design.
  • Enhanced heat transfer capabilities

Routine maintenance typically includes checking refrigerant levels, inspecting and cleaning heat exchangers, monitoring pump performance, and ensuring proper water flow. Regular maintenance helps ensure optimal efficiency and prolongs the lifespan of the unit.

Yes!

Many water-cooled screw units are compatible with building management systems (BMS). They can be integrated for remote monitoring and control, allowing operators to optimize performance and energy use based on real-time data and demands.

Water-cooled screw units are ideal for a variety of applications, including:

  • Large commercial buildings (offices, hotels, shopping malls).
  • Industrial processes (manufacturing, food processing).
  • Data centers (to maintain optimal temperatures for equipment).
  • District cooling systems (providing chilled water to multiple buildings).
  • Laboratories and research facilities requiring precise temperature control.

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