System Design Options

Table 11. Retrofit capacity changes

 

 

 

 

Larger

 

 

Present

chiller,

 

 

 

 

same tower

 

 

 

 

 

 

Capacity, tons

450

[1,580]

675

[2,370]

[kW refrigeration]

 

 

 

 

 

 

 

 

Cooling tower

Flow rate, gpm [L/s]

1350 [85.2]

1,350 [85.2]

 

 

 

 

 

Entering temperature, °F [°C]

94.3 [34.6]

103 [39.4]

 

 

 

 

 

 

 

 

Leaving temperature, °F [°C]

85

[29.4]

88

[31.1]

 

 

 

 

 

Ambient wet-bulb

78

[25.6]

78

[25.6]

temperature, °F [°C]

 

 

 

 

 

 

 

 

 

 

It quickly becomes evident that the same cooling tower and flow rate are adequate to reject more heat—in this case, approximately 50 percent more heat.

Figure 22. Cooling tower re-selection with different chiller capacities

Cooling Tower Water Temperature (°F)

90

85

80

75

70

Reselected tower for 50% more heat rejection with 15°F [8.3°C]

range

Y

 

Original design point for tower with 10°F [5.6°C] range

Design Point (original)

Y Design Point (new)

65

55

60

65

70

75

80

Wet-Bulb Temperature (°F)

Retrofit opportunities

The low-flow concepts for chilled- and condenser-water just described in pages 33 through 37 present tremendous retrofit opportunities. Building owners may need to increase the capacity of an existing system, for example, in response to a building addition. In many of these buildings, the condenser water system (piping, pump, and tower) is in good condition, but is considered to be too small. Or, the system has expanded but the chilled water pipes and/or coils cannot be changed. By changing from traditional design conditions, the existing infrastructure can often be used while providing additional capacity.

SYS-APM001-EN

Chiller System Design and Control

37

Page 43
Image 43
Trane SYS-APM001-EN manual Retrofit opportunities, Retrofit capacity changes Larger Present Chiller Same tower

SYS-APM001-EN specifications

The Trane SYS-APM001-EN is an advanced control system designed for HVAC (Heating, Ventilation, and Air Conditioning) applications, specifically tailored to enhance energy efficiency and system performance. This comprehensive solution integrates cutting-edge technologies to optimize climate control in commercial and industrial environments.

One of the main features of the SYS-APM001-EN is its intuitive user interface. The system is equipped with a large, easy-to-read display that provides real-time data on system performance, energy usage, and environmental conditions. This user-friendly interface makes it simple for operators to monitor and adjust settings, ensuring optimal comfort levels and efficient energy consumption.

Another key characteristic of the SYS-APM001-EN is its advanced data analytics capabilities. The system collects and analyzes data from various sensors throughout the building, providing insights into occupancy patterns, equipment performance, and energy consumption trends. This data-driven approach allows facility managers to make informed decisions about system adjustments, predictive maintenance, and energy savings.

The SYS-APM001-EN also boasts robust integration capabilities. It can seamlessly connect with a variety of building management systems (BMS) and other third-party devices. This interoperability enables a cohesive operational ecosystem where HVAC systems can communicate and cooperate with lighting, security, and fire safety systems, enhancing overall building efficiency.

Energy efficiency is a hallmark of the SYS-APM001-EN, as it implements sophisticated algorithms to optimize system operation. These algorithms adjust equipment performance in real-time based on current conditions, thereby reducing energy waste and lowering operational costs. The system is designed to support multiple energy-saving strategies, including demand-controlled ventilation and optimal start/stop scheduling.

Additionally, the SYS-APM001-EN is built with scalability in mind, accommodating facilities of various sizes and configurations. Whether it’s a small office building or a large industrial complex, the system can be tailored to meet specific needs, ensuring that HVAC performance aligns with operational goals.

In conclusion, the Trane SYS-APM001-EN is an innovative HVAC control solution that emphasizes user experience, data-driven decision-making, and energy efficiency. With its advanced features and technologies, it is an essential tool for optimizing building performance and enhancing occupant comfort while reducing environmental impact.