Product Overview
Chilled Water AC, commonly referred to as a CRAH (Computer Room Air Handler), is a precision cooling unit specifically designed for data centers, server rooms, and mission-critical environments. Unlike traditional air conditioners that generate their own cooling, a CRAH unit relies on an external source - a central chiller plant - to supply chilled water for cooling.
The CRAH unit consists primarily of a fan and a cooling coil through which chilled water flows. Warm air from the IT equipment is drawn across this coil, where the heat is transferred to the chilled water and carried away. This design is inherently more energy-efficient and scalable than self-contained systems, making it the preferred choice for medium to large data centers where a central chilled water plant is already in place. The system delivers temperature control accuracy of ±1℃ and humidity control accuracy of ±5%.
Applications
- Large Data Centers & Enterprise Server Rooms
- High-Density Computing Environments
- Colocation & Hyperscale Data Centers
- Telecommunications Switching Stations
- Clean Rooms & Precision Laboratories
- Medical Equipment Rooms (MRI, CT, etc.)
Key Features
Chilled Water Cooling Technology
The CRAH unit utilizes chilled water supplied by a central chiller plant (air-cooled or water-cooled) to remove heat. This approach eliminates the need for compressors within the cooled space, significantly reducing in-room power consumption and maintenance. With a high sensible heat ratio (up to 95%), the system focuses cooling capacity on directly lowering air temperature rather than removing moisture, optimizing efficiency for IT environments.
High-Efficiency EC Fans
Equipped with the latest generation of Electronically Commutated (EC) fans. These fans feature brushless DC motors, providing a longer lifespan and dynamically adjusting speed based on real-time data center heat loads. This precise speed control lowers energy consumption and ensures stable, quiet operation.
High Sensible Heat Ratio DesignPrecision Control & Reliability
Equipped with a state-of-the-art microprocessor controller. Supports integration with Building Management Systems (BMS) via standard protocols such as Modbus. A modulating control valve precisely regulates the flow of chilled water to match the exact cooling demand of the room. Options like Automatic Transfer Switches (ATS) ensure service continuity and system redundancy.
Optimized Heat Exchanger Design
The cooling coil is constructed with copper tubing and aluminum fins, featuring a wide exchange surface and low air crossing speed to maximize heat transfer. The system is optimized for high chilled water temperatures, which prevents condensate formation that could damage equipment and allows for effective integration with free cooling chillers.
Flexible Deployment
Supports multiple airflow configurations, including upflow and downflow, to accommodate various room layouts such as raised-floor underfloor supply and hard floor installations. The compact design simplifies installation and integration into existing data center infrastructure.
Applications
- Large Data Centers & Enterprise Server Rooms
- High-Density Computing Environments
- Colocation & Hyperscale Data Centers
- Telecommunications Switching Stations
- Clean Rooms & Precision Laboratories
- Medical Equipment Rooms (MRI, CT, etc.)
Note: The above system description serves as a reference for standard functionality and architecture, intended to demonstrate core capabilities. Actual project solutions require customized design based on facility scale, cooling source conditions, heat load characteristics, and client requirements. Specific equipment configurations, cooling capacity ranges, and detailed parameters are subject to project-specific selection. For detailed technical data or selection assistance, please contact us through any of the channels listed on our "Contact Us" page. Our technical team will provide tailored recommendations based on your specific project needs.
Hot Tags: chilled water ac, China chilled water ac manufacturers, suppliers, factory
