Types of Chillers for Industrial Applications
Industrial machines and manufacturing processes generate heat during continuous operation. Maintaining the required operating temperature is important for process stability, machine performance and consistent production conditions.
An industrial chiller removes excess heat from a process fluid, machine or industrial application and helps maintain the required temperature. Depending on the application, the medium being cooled may be hydraulic oil, machining coolant or water.
Lex Technoaid provides different types of industrial chillers for machine tools and manufacturing applications, including:
The appropriate chiller depends on the medium being cooled, heat load, required temperature, flow rate, machine type and operating conditions.
What Is an Industrial Chiller?
An industrial chiller is a cooling system used to remove unwanted heat from industrial equipment, process fluids or manufacturing operations. The chiller helps maintain the required operating temperature by continuously removing heat generated during machine or process operation. Industrial chillers are used in applications where uncontrolled temperature variation can affect operating conditions, process consistency or temperature-sensitive components.
Typical industrial applications include:
- CNC machining.
- Grinding.
- Milling.
- Turning.
- Hydraulic systems.
- Injection moulding.
- Spindle cooling.
- Motor cooling.
- Induction hardening.
- Laser processing.
- 3D printing.
How Are Industrial Chillers Classified?
Industrial chillers can be classified in different ways depending on the application and system design. For machine-tool and manufacturing applications, some of the most relevant classifications include:
By Cooling Medium
Chillers may be selected according to the fluid that needs temperature control:
By Heat-Rejection Method
Industrial chillers may also be classified as:
- Air-cooled chillers.
- Water-cooled chillers.
By System Configuration
Depending on the application, chillers may be configured as:
- Dip-In Chillers.
- Stand-Alone Chillers.
- Single-circuit chillers.
- Dual-circuit chillers.
- Individual chillers.
- Centralized chillers.
Understanding these classifications makes it easier to identify a suitable chiller for a particular machine or manufacturing process.
Main Types of Industrial Chillers
1. Hydraulic Oil Chillers
Hydraulic Oil Chillers are designed to maintain the required temperature and viscosity of hydraulic oil used in industrial equipment. During continuous operation, hydraulic systems can generate heat. If the oil temperature varies significantly, its operating characteristics can also change.
Hydraulic Oil Chillers help maintain controlled oil temperatures in applications such as:
- Machine tools.
- High-speed presses.
- Special-purpose machines.
- Hydraulic systems.
- Other industrial equipment using hydraulic oil.
Benefits of Hydraulic Oil Chillers
- Maintains the required hydraulic oil temperature.
- Supports stable oil viscosity.
- Helps maintain controlled hydraulic-system operating conditions.
- Suitable for different grades of hydraulic oil.
- Available in capacities from 0.3 to 50 Ton.
- Uses refrigerants with Zero Ozone Depletion Potential.
Hydraulic Oil Chillers are particularly relevant where hydraulic oil temperature needs to remain within the required operating range during extended machine operation.
2. Coolant Chillers
Coolant Chillers are used to maintain the temperature of machining coolants such as oil and emulsion coolant. During machining and pumping, heat can accumulate in the coolant. Controlled coolant temperature can support stable machining conditions.
Coolant Chillers are suitable for applications such as:
- CNC machining.
- Grinding.
- Turning.
- Milling.
- Gear hobbing.
- Gun drilling.
- Spindle cooling.
Benefits of Coolant Chillers
- Maintains controlled coolant temperature.
- Supports coolant and tool performance.
- Supports machining accuracy.
- Suitable for open-loop and closed-loop systems.
- Available in capacities from 0.3 to 100 Ton.
- Centralized configurations can serve multiple machines.
- Uses refrigerants with Zero Ozone Depletion Potential.
Lex Coolant Chillers are available in different configurations depending on the cooling requirement.
Dip-In Coolant Chillers
A Dip-In Chiller is installed directly in the coolant or oil tank to cool the fluid. This configuration can be suitable where direct cooling of the fluid inside the tank is required. Lex Dip-In Chillers use microprocessor-based control to support different temperature-control requirements, including:
- Maintaining the medium at a temperature close to ambient conditions.
- Supporting the critical metrological balance of the machine.
- Chilling the medium to a fixed temperature.
Lex also manufactures DM Water Chillers with stainless-steel tanks, pumps and other non-corrosive wetted parts.
Stand-Alone Coolant Chillers
A Stand-Alone Chiller is configured separately from the connected machine or process.
Lex Stand-Alone Chillers can support:
- Water cooling.
- Coolant cooling.
- Hydraulic oil cooling.
- Spindle cooling.
They can be designed for both open-loop and closed-loop applications. Centralized configurations can also be developed where multiple machines require cooling.
Benefits of Stand-Alone Chillers
- Supports controlled coolant and process temperatures.
- Suitable for open-loop and closed-loop applications.
- Available in capacities from 0.3 to 100 Ton.
- Available in single-circuit and dual-circuit configurations.
- Supports spindle and motor temperature control.
- Suitable for applications involving laser heads and induction coils.
3. Water Chillers
Industrial Water Chillers provide controlled water temperatures for machines and manufacturing processes that require consistent cooling. Water absorbs heat from the connected machine or process and returns to the chiller. The heat is removed and temperature-controlled water is supplied back to the application.
Lex Water Chillers are suitable for applications such as:
- Spindle cooling.
- Motor cooling.
- Induction hardening.
- Injection moulding.
- Laser cutting.
- Laser marking.
- Laser welding.
- 3D printing.
Benefits of Water Chillers
- Provides controlled water temperature.
- Supports process stability and consistency.
- Available in capacities from 0.3 to 100 Ton.
- Available in single-circuit and dual-circuit configurations.
- Supports spindle and motor cooling.
- Suitable for laser and induction-hardening applications.
- Uses refrigerants with Zero Ozone Depletion Potential.
Hydraulic Oil Chiller vs Coolant Chiller vs Water Chiller
The primary difference between these chiller types is the medium being cooled and the application in which the chiller is used.
| Chiller Type | Medium Cooled | Typical Applications | Lex Capacity Range |
|---|---|---|---|
| Hydraulic Oil Chiller | Hydraulic oil | Machine tools, high-speed presses, hydraulic systems and SPMs | 0.3–50 Ton |
| Coolant Chiller | Oil and emulsion coolant | CNC machining, grinding, turning, milling, gear hobbing and gun drilling | 0.3–100 Ton |
| Water Chiller | Water | Spindle cooling, injection moulding, induction hardening, laser processing and 3D printing | 0.3–100 Ton |
The correct chiller should be selected according to the actual machine, cooling medium and process requirement.
Air-Cooled vs Water-Cooled Chillers
Another common way of classifying chillers is according to how heat is rejected from the refrigeration system.
Air-Cooled Chillers
Air-cooled chillers use ambient air to reject heat through the condenser. Fans move air across the condenser to remove the heat generated by the cooling process. Air-cooled systems generally require less external water infrastructure.
Water-Cooled Chillers
Water-cooled chillers reject heat through a separate condenser-water circuit. Depending on the installation, this may require additional water infrastructure such as a cooling tower or facility water circuit.
The appropriate configuration depends on:
- Cooling requirement.
- Installation conditions.
- Available utilities.
- Ambient conditions.
- Application requirements.
Single-Circuit vs Dual-Circuit Chillers
Industrial chillers may also be designed with different circuit configurations.
Single-Circuit Chiller
A single-circuit chiller uses one cooling or refrigeration circuit and can be suitable where the connected application has one defined cooling requirement.
Dual-Circuit Chiller
A dual-circuit chiller incorporates two refrigeration circuits. It may be selected where the application requires additional cooling capacity, operating flexibility or a configuration suited to the particular process.
Lex provides single-circuit and dual-circuit configurations for suitable chiller applications.
Individual vs Centralized Chillers
Industrial cooling systems can also be configured according to the number of machines they serve.
Individual Chiller
An individual chiller is connected to a specific machine or process. This may be suitable where each machine has a separate cooling requirement.
Centralized Chiller
A centralized chiller can be configured to provide cooling to multiple connected machines. When designing a centralized system, factors such as the following should be considered:
- Number of machines.
- Combined heat load.
- Required fluid temperature.
- Total flow requirement.
- Operating duration.
- Machine usage pattern.
- Future production expansion.
Centralized chillers can be useful where several machines require a common cooling solution.
Applications of Different Types of Chillers
Different industrial chillers are selected according to the process and cooling medium.
Hydraulic Oil Chiller Applications
- Hydraulic systems.
- Machine tools.
- High-speed presses.
- Special-purpose machines.
Coolant Chiller Applications
- CNC machining.
- Grinding.
- Turning.
- Milling.
- Gear hobbing.
- Gun drilling.
Water Chiller Applications
- Spindle cooling.
- Motor cooling.
- Injection moulding.
- Induction hardening.
- Laser cutting.
- Laser marking.
- Laser welding.
- 3D printing.
How to Choose the Right Type of Industrial Chiller
Selecting an industrial chiller involves more than choosing a cooling capacity. The complete application requirement should be evaluated before selecting the system.
1. Identify the Cooling Medium
First determine whether the system needs to cool:
- Hydraulic oil.
- Machining coolant.
- Water.
This helps identify the appropriate chiller category.
2. Determine the Process Heat Load
The amount of heat generated by the machine or process influences the required cooling capacity.
3. Determine the Required Temperature
The required inlet and outlet temperature of the cooling medium should be identified. Different machines and processes may operate at different temperature requirements.
4. Determine the Required Flow Rate
The chiller should be capable of supporting the required flow through the connected equipment or process.
5. Consider Operating Duration
Equipment operating continuously may have different cooling requirements from equipment operating for shorter production periods.
6. Evaluate Site Conditions
Ambient temperature, available installation space and utilities should also be considered.
7. Select the System Configuration
Depending on the application, the system may require:
- Dip-In or Stand-Alone configuration.
- Open-loop or closed-loop operation.
- Single or dual circuit.
- Individual or centralized cooling.
Evaluating these factors helps ensure that the chiller configuration matches the actual process requirement.
Why Choose Lex Technoaid for Industrial Chillers?
Lex Technoaid has been supporting machine-tool and manufacturing applications since 1994. Rather than selecting chillers only according to nominal capacity, Lex evaluates factors such as:
- Machine type.
- Cooling medium.
- Process heat load.
- Required operating temperature.
- Flow requirement.
- Operating duration.
- System configuration.
- Site conditions.
Lex Industrial Chillers are available in different capacities and configurations for hydraulic oil, coolant and water-cooling applications.
Choosing the Right Industrial Chiller
There is no single chiller configuration suitable for every industrial application. The correct solution depends on the fluid being cooled, machine type, process heat load, required temperature, flow rate, operating duration and system configuration.
Lex Technoaid provides Hydraulic Oil Chillers, Coolant Chillers and Water Chillers for machine tools and manufacturing processes, with application-specific configurations based on the cooling requirement.
Need Help Selecting the Right Industrial Chiller?
Lex Technoaid provides Industrial Chillers for hydraulic oil, coolant and water-cooling applications, with capacities ranging from 0.3 to 100 Ton depending on the chiller type.
Contact marketing@lextechnoaid.com or call +91 99166 98105 to discuss your industrial chiller requirement.