period one

What Is Variable Air Volume?

notes

 

 

 

 

 

System Comparison

 

 

 

 

 

 

 

constant-volume,

constant-volume,

VAV

 

 

 

single zone

terminal reheat

 

Constant fan

Constant fan

Fan energy

 

 

energy

energy

savings

 

Refrigeration

Nearly constant

Refrigeration

 

 

energy

refrigeration

energy

 

 

savings

energy

savings

 

Delivers comfort

Delivers comfort

Delivers comfort

 

 

to only one

to many spaces

to many spaces

 

 

thermal zone

inefficiently

efficiently

 

 

 

Reheat energy

 

 

 

 

 

increases at part

 

Figure 14

 

 

 

load

 

 

 

 

 

 

 

Contrasting the three systems discussed in this example, the simple, constant- volume, variable-temperature system consumes constant fan energy while providing refrigeration energy savings at part load. However, it can only deliver comfort to spaces with similar loads.

The terminal reheat system can serve many spaces with dissimilar load requirements, but consumes constant fan energy and nearly constant refrigeration energy at part load. It also uses an increasing amount of reheat energy at part load.

On the other hand, the variable-air-volume system is capable of providing both fan and refrigeration energy savings at part load, making it the most energy efficient of these three systems. In addition, the VAV system can efficiently serve many spaces with dissimilar cooling and heating load requirements.

TRG-TRC014-EN

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Trane TRG-TRC014-EN manual System Comparison, Vav

TRG-TRC014-EN specifications

The Trane TRG-TRC014-EN is a comprehensive technical resource guide that serves as an essential tool for HVAC professionals and engineers looking to enhance their understanding of Trane's commercial HVAC systems. This guide provides an in-depth examination of Trane’s advanced technologies, key features, and design characteristics that position their products as industry leaders in heating, ventilation, and air conditioning.

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