Chilled Beam, Active (Ventilated) Explained

As HVAC professionals, understanding the latest technologies in thermal management is crucial for optimizing energy efficiency and occupant comfort. One such technology gaining traction in modern buildings is the active chilled beam system. Let's delve into what active chilled beams are and their implications for HVAC design.

What is an Active Chilled Beam?

An active chilled beam is a type of hydronic cooling system that utilizes a cooled element or cooling coil integrated with air supply to condition indoor environments. This system allows either primary air, induced air, or a combination of both to flow over the exterior surface of the coil.

Key Components and Functionality

The main components of an active chilled beam include:

• Cooling Coil: Typically filled with chilled water, the coil serves as the primary cooling element.
• Air Supply: Primary air is introduced into the system, which can be conditioned by the ventilation system.
• Induced Air: As the primary air cools the surrounding air, it induces additional air to circulate through the beam, enhancing the cooling effect.

Benefits of Active Chilled Beams

Active chilled beams offer several advantages for HVAC professionals to consider:

• Energy Efficiency: With a lower reliance on traditional cooling and heating methods, active chilled beams can lead to significant energy savings.
• Reduced Noise Levels: The silent operation compared to conventional systems creates a more comfortable indoor environment.
• Improved Indoor Air Quality: Enhanced ventilation with better temperature control results in a healthier indoor atmosphere.

Design Considerations

When incorporating active chilled beams into a building's HVAC design, professionals should keep the following in mind:

• Carefully assess the load calculations to ensure proper system sizing.
• Evaluate water quality for the chilled water used in the system to minimize maintenance issues.
• Consider duct designs that accommodate both the primary and induced airflows effectively.

Conclusion

Active chilled beam systems represent a sophisticated approach to managing indoor climates, offering HVAC professionals a reliable solution for energy efficiency and comfort. By understanding the principles and benefits of this technology, you can enhance your building designs and meet the evolving demands of heating, ventilation, and air conditioning.