Air Cooled
Screw Chillers

150Kw to 3000Kw

• Inverter driven and Fixed Speed Both
• Weather proof
• Compact
• Efficient
• Stepless Capacity Control
• Inbuilt Primary & Secondary Pump Option
• Fully PLC Controlled with MODBUS
• Pressure & Temperature on Transmitter

Air Cooled Screw Chillers

When a manufacturing process requires continuous and dependable cooling, the chiller must be capable of handling changing loads, demanding operating conditions and long operating hours. An Air Cooled Screw Chiller is designed for exactly these types of applications. It uses a screw compressor for refrigeration and an air-cooled condenser to reject heat directly into the surrounding atmosphere.

Unlike a water cooled chiller, an air cooled screw chiller does not require a cooling tower or a separate condenser-water circuit. This makes the overall cooling system simpler to install and operate, particularly at locations where water availability, cooling tower space or water treatment can be a concern.

Reynold India offers air cooled screw chillers for medium and large industrial and commercial cooling requirements. The current product range covers 150 kW to 3000 kW, with both inverter-driven and fixed-speed configurations available. The systems are designed for efficient operation, automatic control and reliable performance in demanding environments.

What Is an Air Cooled Screw Chiller?

An air cooled screw chiller is a refrigeration system that uses a screw compressor to produce chilled water or another compatible cooling fluid. The heat removed from the process is rejected to ambient air through an air-cooled condenser.

The main components of the system include the screw compressor, evaporator, condenser, expansion device, refrigerant circuit, condenser fans and control system.

During operation, warm process water enters the evaporator. The refrigerant absorbs heat from the water, reducing its temperature. The cooled water is then circulated back to the process. The heated refrigerant is compressed by the screw compressor and passes through the air-cooled condenser, where condenser fans transfer the heat to the atmosphere. The refrigerant then passes through the expansion device and returns to the evaporator to continue the refrigeration cycle.

This continuous process provides controlled cooling for industrial equipment and processes.

Why Use Screw Compressor Technology?

Screw compressors are particularly suitable for applications that require substantial cooling capacity and extended operating hours. Their design allows the refrigeration system to handle continuous loads while providing capacity control according to the cooling requirement.

For applications where the cooling load changes throughout the day, stepless capacity control can help the chiller adjust its output more closely to the actual demand. This can be important in manufacturing plants where production conditions and heat loads are not constant.

Reynold India's air cooled screw chillers are available in both inverter-driven and fixed-speed configurations, allowing the system to be selected according to the application's operating profile and energy requirements.

Key Features of Reynold India Air Cooled Screw Chillers

• Capacity Range: 150 kW to 3000 kW: The current Reynold India product range is designed for larger cooling requirements, with capacities from 150 kW to 3000 kW. This makes the range suitable for applications ranging from medium-scale industrial processes to large cooling installations.
• Inverter Driven and Fixed Speed Options: Different industrial applications have different load patterns. Inverter-driven systems can vary compressor operation according to cooling demand, while fixed-speed configurations can be suitable for applications with relatively stable loads.
• Stepless Capacity Control: Stepless capacity control allows the refrigeration system to adjust cooling output continuously rather than relying only on fixed operating steps. This is particularly useful when process loads vary during production.
  Reynold's related technical information also describes capacity control designed to adapt to varying process loads.
• Weather-Proof Construction: Air cooled screw chillers are commonly installed outdoors. Weather-proof construction helps the equipment operate in outdoor environments, subject to proper installation, ventilation and the specified ambient operating conditions.
• Compact Configuration: A compact arrangement can simplify installation and make better use of available plant space. However, adequate clearance around air-cooled condenser sections is essential for proper airflow and heat rejection.
• Inbuilt Primary and Secondary Pump Option: Reynold India's product page lists an inbuilt primary and secondary pump option. This can help simplify the chilled-water system by integrating pumping arrangements with the chiller package when required.
• PLC Control with MODBUS: The chiller is available with fully PLC-controlled operation and MODBUS communication. This allows important operating parameters to be monitored and provides the possibility of integrating the chiller with suitable plant or building management systems.
• Pressure and Temperature Transmitters: Pressure and temperature transmitters provide operating information to the control system. Monitoring these parameters is important for maintaining stable operation and protecting the refrigeration system.

Applications of Air Cooled Screw Chillers

Air cooled screw chillers are used in industries where continuous and reliable process cooling is required. The correct capacity and configuration depend on the actual heat load, required fluid temperature, flow rate and ambient conditions.

• Plastic Processing Industry: Plastic injection moulding, extrusion, blow moulding and other plastic processing operations generate considerable heat. Chilled water can be used for mould cooling, process equipment and auxiliary systems.
  A properly selected screw chiller can help maintain stable cooling conditions, which can contribute to consistent production and process control.
• Pharmaceutical Industry: Pharmaceutical manufacturing often requires controlled environmental and process conditions. Chilled water systems can be used for process cooling, HVAC systems and equipment cooling, depending on the facility's requirements.
• Chemical and Process Industries: Chemical and process plants may require continuous cooling for reactors, machinery, hydraulic systems and other heat-generating equipment. Air cooled screw chillers can be engineered for such applications based on the required process temperatures and cooling load.
• Food and Beverage Industry: Food and beverage facilities use cooling systems for processing equipment, production areas and temperature-sensitive processes. The chiller selection should take into account the required temperature, fluid type and operating conditions.
• Manufacturing Plants: General manufacturing facilities may require chilled water for machine cooling, process cooling and central utility systems. Air cooled screw chillers provide a practical option where a cooling tower is not preferred.
• HVAC and Comfort Cooling: Large commercial and industrial buildings can use air cooled screw chillers as part of centralized chilled-water air-conditioning systems. The chiller supplies cooled water to air-handling units or other suitable cooling equipment.

Advantages of Air Cooled Screw Chillers

An important advantage of an air cooled screw chiller is that the condenser rejects heat directly to ambient air. Therefore, a separate cooling tower and condenser-water system are not required.

Other potential advantages include:

• Suitable for medium and large cooling capacities
• No cooling tower required
• Reduced dependence on condenser-water availability
• Inverter and fixed-speed configurations
• Stepless capacity control
• Suitable for continuous industrial operation
• PLC-based automatic control
• MODBUS communication option
• Optional integrated primary and secondary pumps
• Outdoor installation capability
• Pressure and temperature monitoring

Actual energy performance depends on operating conditions, load profile, ambient temperature, chilled-water temperature and equipment configuration. Therefore, the chiller should always be selected according to the actual application rather than capacity alone.

How to Select the Right Air Cooled Screw Chiller?

Choosing the correct chiller starts with understanding the application's cooling requirement. The following parameters should be evaluated before final selection:

• Cooling capacity: Calculate the actual heat load generated by the process and select an appropriate chiller capacity.
• Fluid temperature: The required inlet and outlet temperatures directly affect chiller selection and performance.
• Flow rate: The required chilled-water flow should be calculated based on the heat load and temperature difference.
• Ambient temperature: Since the condenser uses ambient air for heat rejection, the design ambient temperature is an important selection parameter.
• Load profile: Determine whether the process operates at a constant load or experiences significant variations. This helps determine whether an inverter-driven or fixed-speed configuration is more appropriate.
• Installation location: Adequate airflow and service access must be provided around the chiller, particularly around the condenser and fan sections.
• Control requirements: If the plant requires remote monitoring or integration with a central automation system, PLC and MODBUS communication capabilities can be considered.

Refrigerant and Configuration Options

Reynold India's current air cooled screw chiller page displays options associated with R-134a, R-407C and HFO refrigerants, along with CE, PED and UL markings on the product presentation. The exact refrigerant and equipment configuration should be confirmed for the selected model and application.

Reynold India's published technical material also describes features such as factory-tested DX and flooded evaporators, electronic expansion valves, PLC-based controls and condenser designs intended for demanding ambient conditions.

Why Choose Reynold India for Air Cooled Screw Chillers?

Reynold India is an Indian manufacturer of industrial water chillers and cooling solutions, with products serving industries including pharmaceuticals, plastics, food processing and power generation.

The company's air cooled screw chiller range is designed for customers requiring higher-capacity cooling with automatic control and flexible configuration options. With a published capacity range of 150 kW to 3000 kW, both inverter-driven and fixed-speed choices, stepless capacity control and PLC/MODBUS-based controls, the system can be configured according to the requirements of different industrial applications.

Frequently Asked Questions

• What is an air cooled screw chiller? An air cooled screw chiller is a refrigeration system that uses a screw compressor and air-cooled condenser to produce chilled water or process cooling fluid. Heat is rejected directly to the surrounding air.
• What is the capacity range of Reynold India air cooled screw chillers? The current product page lists a capacity range of 150 kW to 3000 kW.
• Does an air cooled screw chiller need a cooling tower? No. The condenser rejects heat directly to ambient air, so a separate cooling tower and condenser-water circuit are not required.
• What is the difference between an inverter and fixed-speed screw chiller? An inverter-driven chiller can vary compressor operation according to the cooling demand, while a fixed-speed compressor generally operates at a fixed speed with capacity managed through the available control method. The suitable option depends on the application's load profile and operating requirements.
• Where are air cooled screw chillers used? They are used in plastic processing, pharmaceutical manufacturing, chemical and process industries, food and beverage plants, general manufacturing, HVAC and other applications requiring medium to large cooling capacities.
• Can an air cooled screw chiller be customized? Yes, chiller selection can be based on application-specific requirements such as cooling capacity, fluid temperature, flow rate, ambient conditions, pump arrangement, control system and refrigerant. The final configuration should be determined from the project's technical requirements.

Get the Right Air Cooled Screw Chiller for Your Application

An air cooled screw chiller is a practical choice for industries that need dependable cooling without a cooling tower. However, the best chiller is not simply the one with the highest capacity. Correct selection requires an understanding of the process heat load, operating temperatures, flow rate, ambient conditions and expected load variation.

Reynold India's 150 kW to 3000 kW air cooled screw chiller range provides options for medium and large cooling requirements, with inverter-driven and fixed-speed configurations, stepless capacity control, PLC-based automation, MODBUS communication and optional integrated pumping arrangements.

For a project-specific recommendation, provide the required cooling capacity, inlet and outlet temperature, flow rate, application, ambient temperature and operating hours. These details allow the appropriate air cooled screw chiller configuration to be selected for reliable and efficient operation.