System Configurations

rate changes (Table 14). Selecting chillers with these characteristics improves the likelihood of stable, uninterrupted operation.

Estimate the expected flow-rate changes and make sure that the chillers you select can adapt to them. For example, one of the newest unit controllers on the market can reliably maintain the desired chilled water temperature with a flow-rate reduction of 50 percent per minute. Figure 38 shows the response of a chiller equipped with this controller in a more extreme situation. The flow dropped 67 percent in 30 seconds, with limited effect on the leaving chilled water temperature. Another, less robust chiller controller permits flow-rate changes of less than 2 percent per minute and would need 25 minutes to adapt to a flow-rate reduction of 50 percent. Fluctuations of 2 percent or more are typical, even during normal system operation. Attempting to limit flow-rate changes to this extent while starting or stopping a chiller is impractical, if not impossible.

When comparing prospective chillers, consider the transient-flow tolerance of the unit controllers. Then work closely with the chiller manufacturer to devise a flow-transition sequence that accounts for the unique operating characteristics of both the chiller and the application. Transient flow rate control is discussed in more detail on page 65.

Figure 38. Example of chiller control responsiveness to flow-rate reduction*

*Data represents a Trane AdaptiView™ and CH530 chiller controller with flow compensation.

Select for nearly equal pressure drops across all chiller evaporators. A VPF design loads and unloads the chiller(s) based primarily on the rate of water flow through the evaporator. If a difference in size or type of evaporator gives one chiller a lower pressure drop than the others in the plant, that chiller will receive a higher rate of water flow and a correspondingly greater load.

Dissimilar pressure drops can make it difficult to provide stable plant operation. Table 15 demonstrates this effect in a two-chiller system (similar to the one shown in Figure 37). In this case, more water flows through Chiller 1’s

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Chiller System Design and Control

SYS-APM001-EN

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Trane SYS-APM001-EN manual System Configurations
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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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