Air Cooled Scroll Chillers
Air Cooled Scroll Chiller – Smart Cooling for Reliable, Cost-Effective Performance
When industries need dependable cooling without the complexity of cooling towers or water treatment systems, the air cooled scroll chiller becomes the preferred solution. Compact, efficient, and easy to install, air cooled scroll chillers are widely used across manufacturing plants, commercial buildings, and process industries where consistent cooling and low maintenance are essential.
In this detailed guide, we explain what an air cooled scroll chiller is, how it works, where it is best used, how to calculate TR, and how to select the right system for your application—in simple, practical language that customers can easily understand.
What Is a Air Cooled Scroll Chiller?
An air cooled scroll chiller is a refrigeration system that removes heat from a process or HVAC system and rejects that heat directly into the atmosphere using air-cooled condensers and axial fans. It uses scroll compressors, known for smooth operation, high efficiency, and low noise.
Unlike water cooled chillers, air cooled scroll chillers do not require:
- Cooling towers
- Condenser water pumps
- Water treatment systems
This makes them an ideal choice where water availability is limited or installation simplicity is a priority.
Air cooled scroll chillers are typically available in the 5 TR to 60 TR capacity range, making them suitable for small to medium cooling loads.
Why Customers Prefer Air Cooled Scroll Chillers
Customers often choose air cooled scroll chillers because they offer the best balance between performance, cost, and convenience.
Key Customer Benefits
- Easy installation and quick commissioning
- Lower initial investment
- Minimal maintenance requirements
- No water consumption
- Reliable performance in diverse environments
For many applications, an air cooled scroll chiller is the most practical and economical cooling solution.
Advantages of Air Cooled Scroll Chillers
Air cooled scroll chillers are easy to install and operate since they do not require a cooling tower or condenser water system. They offer high energy efficiency, low maintenance, and reliable performance, making them ideal for commercial and industrial cooling applications.
One
Simple Installation: No cooling tower or condenser water piping is required.
Two
Low Maintenance: Fewer auxiliary systems mean less maintenance and lower operating costs.
Three
Energy Efficient at Medium Loads: Scroll compressors offer excellent efficiency under stable load conditions.
Four
Compact & Space Saving: Ideal for rooftop or outdoor installation.
Fifth
Environment Friendly: No water usage and reduced resource consumption.
Process of Air cooled Scroll Chiller
How an Air Cooled Scroll Chiller Works
An air cooled scroll chiller operates on the vapour compression refrigeration cycle, with air used as the heat rejection medium.
Working Process Explained Simply
1. Heat Absorption (Evaporator)
Chilled water absorbs heat from the process or air-handling system. The refrigerant inside the evaporator absorbs this heat and evaporates.
2. Compression (Scroll Compressor)
The scroll compressor compresses the low-pressure refrigerant gas into a high-pressure, high-temperature gas with smooth, continuous motion.
3. Heat Rejection (Air-Cooled Condenser)
The hot refrigerant flows through the condenser coils, where powerful fans blow ambient air across the coils to release heat into the atmosphere.
4. Expansion
The refrigerant passes through an expansion valve, reducing pressure and temperature before returning to the evaporator.
This cycle runs continuously to maintain stable chilled water temperature.
How to Calculate Air cooled Scroll chiller
How to Calculate TR for an Air Cooled Scroll Chiller
Correct TR calculation ensures efficient cooling and avoids oversizing or undersizing.
Simple TR Formula (Industry Practice)
TR = (Flow Rate × ΔT) ÷ 50
Where:
Flow Rate = Water flow in LPM
ΔT = Temperature difference (°C)
Easy Customer Example
Application
Plastic Injection Molding Machine Cooling
Given Data
Water flow rate: 100 LPM
Inlet water temperature: 30°C
Outlet water temperature: 25°C
Temperature difference (ΔT): 5°C
TR Calculation
TR = (100 × 5) ÷ 50
TR = 500 ÷ 50
TR = 10 TR
Recommended Chiller
A 12–15 TR Air Cooled Scroll Chiller is recommended to handle:
Load variations
Ambient temperature changes
Future expansion
Typical Capacity Range
Air cooled scroll chillers are most suitable for:
5 TR to 60 TR
Stable or moderately varying loads
Medium operating hours
For higher capacities or 24/7 heavy-duty operations, screw chillers may be more suitable.
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Key Components & Applications
Main Components of an Air Cooled Scroll Chiller
Scroll Compressors
Multiple scroll compressors are often used to:
Improve part-load efficiency
Provide redundancy
Reduce wear and tear
Air-Cooled Condenser
Designed with high-efficiency fins and fans for effective heat rejection.
Evaporator
Usually a plate heat exchanger or shell & tube type for efficient heat transfer.
Control Panel
Microprocessor-based controls ensure:
Accurate temperature control
Energy optimization
Safety protection
Applications of Air Cooled Scroll Chillers
Air cooled scroll chillers are used across a wide range of industries:
Plastic & Injection Molding
Controls mold and oil temperature for consistent production quality.
Pharmaceutical & Chemical Industry
Provides reliable cooling for controlled environments and processes.
Food & Beverage Industry
Used in dairies, breweries, and food processing plants.
HVAC Systems
Ideal for offices, hospitals, hotels, and shopping complexes.
Printing, Lamination & Packaging
Ensures smooth operation of heat-generating machinery.