period two

Components of a VAV System

notes

Variable Air Volume to the Space

100%

heating

 

tempering

maximum

 

primary

 

 

 

 

 

 

 

 

airflow

to space

 

warm

 

 

 

airflow

 

primary air

 

 

minimum

 

 

 

 

 

 

 

 

primary

%

 

 

 

 

 

 

cool

primary air

airflow

 

 

 

 

 

 

 

0%

design

 

 

design

 

space load

heating load

cooling load

 

 

Figure 35

As before, this graph indicates how the air supplied to the space by the terminal unit varies as the space loads change. The vertical axis indicates the total airflow (cool primary air plus warm primary air) supplied to the space. The horizontal axis indicates the space load.

To deliver a variable volume of supply air to the space in a two-fan, dual-duct system in the cooling mode, the dual-duct unit is controlled in the same manner as the cooling-only unit. The cool primary airflow is reduced as the cooling load in the space decreases. When the space cooling load drops below the minimum cool primary airflow setting for the unit, overcooling the space, the second modulating device begins to open. This allows the warm primary air to mix with the cool primary air and provide warmer supply air to the space.

As the cooling load decreases further and the space requires heating, more warm primary air is mixed with the minimum amount of cool primary air.

TRG-TRC014-EN

23

Page 28
Image 28
Trane TRG-TRC014-EN manual Variable Air Volume to the Space, Cool Primary air

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.

One of the standout features of the TRG-TRC014-EN is its focus on energy efficiency. Trane continuously works on incorporating cutting-edge technologies that minimize energy consumption while maximizing performance. This includes the use of variable speed compressors and advanced control systems that adapt the HVAC operation according to real-time demand, significantly reducing energy costs for end users.

The guide also highlights Trane’s commitment to sustainable practices. The incorporation of environmentally friendly refrigerants and compliance with regulatory standards ensures that Trane units not only deliver comfort but also contribute to lower environmental impact. The guide provides detailed specifications on these refrigerants, allowing engineers to make informed decisions in line with environmental policies.

Another important aspect of the TRG-TRC014-EN is its technical information regarding system design and application. With comprehensive data on airflow, capacity calculations, and installation techniques, the guide serves as a valuable resource in the design phase of HVAC projects. This ensures that systems are optimized for performance and meet the specific needs of any given commercial space.

Additionally, the TRG-TRC014-EN addresses integration with smart building technologies. Trane units are designed to easily integrate with building management systems (BMS), enabling better monitoring and control of HVAC operations. This compatibility enhances operational efficiency and supports predictive maintenance, reducing downtime and servicing costs.

Moreover, the guide emphasizes Trane’s extensive warranty and service support. Understanding that customer satisfaction extends beyond the sale, Trane provides comprehensive service options that assure users of reliable and prompt support throughout the lifecycle of their HVAC systems.

In conclusion, the Trane TRG-TRC014-EN stands as an essential guide for HVAC professionals seeking to leverage Trane’s innovative technologies and design features. With a strong emphasis on energy efficiency, sustainability, technical accuracy, smart integration, and robust support, this guide underscores Trane's position as a leader in the HVAC industry.