Indirect Evaporative Air Coolers

MasterFormat Division 23 76 16: Indirect Evaporative Air Coolers

MasterFormat Division 23 76 16 covers indirect evaporative air coolers, a highly efficient and sustainable cooling solution for a variety of applications. This comprehensive guide will delve into the intricacies of indirect evaporative air coolers, addressing their functionality, applications, installation best practices, and leading manufacturers.

What is an Indirect Evaporative Air Cooler?

An indirect evaporative air cooler, also known as an evaporative cooler, is a cooling system that utilizes the natural process of water evaporation to cool air without adding moisture to the supply airstream. Unlike direct evaporative coolers, which introduce moisture into the cooled air, indirect evaporative coolers employ a heat exchanger to keep the air streams separate.

How Does an Indirect Evaporative Air Cooler Work?

Indirect evaporative air coolers operate on a two-stage cooling process:

1. Primary air stream: Hot, dry outdoor air is drawn through a heat exchanger, typically constructed of porous media like cellulose pads. Water is circulated over these pads, and as it evaporates, it absorbs heat from the primary air stream, cooling it significantly.
2. Secondary air stream: The cooled primary air stream never comes into direct contact with the secondary air stream, which is the air being supplied to the building. Instead, the heat exchanger facilitates heat transfer, cooling the secondary air stream without adding moisture.

Where are Indirect Evaporative Air Coolers Commonly Used?

Indirect evaporative air coolers are well-suited for climates with hot, dry weather and find applications in various settings, including:

• Commercial buildings
• Industrial facilities
• Data centers
• Healthcare facilities
• Schools and universities
• Manufacturing plants

What are Installation Best Practices for Indirect Evaporative Air Coolers?

Proper installation is crucial for optimal performance and longevity of indirect evaporative air coolers. Key installation best practices encompass:

• Sizing and Selection: Accurately determine the cooling load requirements and select an appropriately sized unit for optimal performance.
• Location: Choose a location that provides adequate airflow and access for maintenance, considering factors such as sunlight exposure and proximity to obstructions.
• Ductwork: Ensure proper ductwork design and installation to minimize pressure drops and ensure efficient air distribution.
• Water Quality: Utilize a reliable water source and implement water treatment measures to prevent scaling and maintain optimal heat exchanger efficiency.
• Controls: Integrate advanced controls for temperature and humidity regulation, optimizing energy efficiency and occupant comfort.

What are the Top Manufacturers for Indirect Evaporative Air Coolers?

The market offers a wide selection of reputable manufacturers specializing in indirect evaporative air coolers. Leading brands renowned for their quality and innovation include:

• Baltimore Aircoil Company (BAC)
• EVAPCO
• SPX Cooling Technologies
• Johnson Controls
• Carrier

Conclusion

Indirect evaporative air coolers offer a sustainable and cost-effective cooling solution for various applications, particularly in hot, dry climates. Their ability to provide substantial cooling without adding moisture to the air stream makes them an attractive alternative to traditional air conditioning systems. By understanding their functionality, applications, installation best practices, and leading manufacturers, building owners and operators can make informed decisions to optimize energy efficiency, reduce operational costs, and enhance occupant comfort.