Application Considerations

For more information about chiller plant controls, consult the Trane applications guide, Tracer Summit™ Chiller Plant Control Program (BAS-APG004-EN).

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To minimize power, large systems must be very efficient. The upside of a large system is the amplification of energy savings. A relatively small percentage of energy saved becomes more valuable. For this reason, the highly efficient series-counterflow arrangement is popular for large systems. (See “Series–Counterflow Application” on page 77.)

Controls

The designers of medium and large chilled-water systems are more likely to consider the pros and cons of direct-digital controls (DDC) versus programmable-logic controls (PLC). These platforms deliver similar results, depending on proper design, programming, commissioning, and operation.

One way to think of PLC is “fast, centralized control with redundancy.” PLC has a faster processing speed, with some hot-redundancy features—such as an entirely redundant system processor that is ready to take over if the main system processor fails.

Conversely, DDC can be considered “steady, distributed control with reliability.” DDC controls feature easy programming and user-friendly operation. In the DDC environment, a failure of the system processor results in the lower-level processors defaulting to a pre-determined operating mode.

The speed of the PLC system can be one of its challenges. Controls that are steady and do not overreact to minor changes work very well, even in large chilled-water systems.

Chiller Plant System Performance

Chiller performance testing

All major chiller manufacturers have chiller performance test facilities in the factory, in a laboratory, or both. A chiller performance test in accordance with the test procedures in ARI Standard 550/5905 can be performed at the factory under controlled conditions, with industrial grade instrumentation and computerized data collection devices. This test ensures that the chiller meets its promised performance criteria. If it does not, corrections are made before it leaves the factory.

Limitations of field performance testing

After the chiller is installed at the job site, the system conditions will be less controllable than in a test facility, and therefore unsuitable for chiller acceptance testing. While measuring the performance of the entire chiller plant is more difficult, it can help identify operating problems or evaluate the effectiveness of system control methods and setpoints.

The goal is to operate as efficiently as possible and to sustain a high level of individual equipment and coordinated operation. A proper energy management system can help trend and diagnose problems or changes over time.

Chiller System Design and Control

SYS-APM001-EN

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Trane SYS-APM001-EN manual Chiller Plant System Performance, Controls, Chiller performance testing
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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.
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