What is a Water-Cooled Chiller and How Do They Work?
Introduction
Water-cooled chillers are key for controlling temperature in industrial and commercial settings. They provide a reliable way to manage unwanted heat in large applications. Water-cooled chillers use water to absorb and release heat, making them, in some cases, more efficient than using air-cooled chillers as a standalone solution, which use air to cool. They are well-suited for settings where energy efficiency, high cooling capacity and long-term operational stability are critical.
These systems are widely used in:
- HVAC applications for large buildings
- Manufacturing processes that require precise temperature regulation
- Data centres where continuous cooling is essential for optimal performance
Water-cooled chillers can be more energy efficient than air-cooled ones. This makes them a better choice for facilities focusing on sustainability and saving money.
At Aggreko, we understand that every cooling challenge is unique. Whether supporting temporary cooling needs during peak demand or providing long-term, scalable solutions, our expertise ensures businesses stay operational, efficient and resilient. With many years of experience, we provide flexible and high-performance cooling solutions. We help customers understand cooling technology. Our goal is to ensure they get the right system for their needs.
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Working Principle of a Water-Cooled Chiller
Water-cooled chillers work on the fundamentals of heat exchange and the refrigeration cycle, efficiently removing heat from a process or environment. These systems use a refrigerant to absorb and transfer heat, with water helping to cool things down.
Unlike air-cooled chillers, which release heat directly into the surrounding air, water-cooled chillers use a cooling tower to disperse excess heat.
Key Stages in Operation
1. Heat absorption at the evaporator: the refrigerant extracts heat from the circulating water, cooling it for recirculation.
2. Refrigeration cycle: the compressor, condenser and expansion valve work together to regulate refrigerant pressure and temperature.
3. Heat rejection through the cooling tower: water transfers heat from the condenser to the cooling tower, where it is released.