System Configurations

Figure 39. Example of operating-cost savings for a VPF, single-chiller plant

Analysis results are based on a 50-ton scroll chiller and a 5-hp chilled water pump for two-story office building in St. Louis, Missouri.

Moderate “low ΔT syndrome” by manifolding the chilled water pumps

Manifolding two or more chilled water pumps (or slightly oversizing a single pump) can provide an individual chiller with more than its design chilled water flow… which means that you can fully load the chiller even if the return water temperature is colder than design.

Sometimes described as “overpumping,” this strategy does not cure “low ΔT syndrome”; it merely reduces the adverse effect of low ΔT on system operation.29 (Refer to “Low ΔT syndrome” on page 79). An example of low ΔT syndrome is receiving a depressed (for example, 49°F [9.4°C]) return- water temperature rather than the design (for example, 56°F [13.3°C]) return- water temperature.

Again, the only methods to load the chiller are to decrease the chilled-water leaving temperature or to increase the flow. If the pumping power and speed allows, the operator may be able to increase the chiller’s flow rate and capacity. Do not exceed the pump’s operating envelope.

Guidelines for a successful VPF system

Chiller selection

•Select for the lowest possible minimum evaporator-flow limit (no more than 40–60 percent of system flow)

•Select for the greatest tolerance to large flow-rate changes, while maintaining required temperature setpoint

•Select chillers with approximately equal pressure drops across the evaporator at the design flow rate

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Chiller System Design and Control

SYS-APM001-EN

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Trane SYS-APM001-EN manual Guidelines for a successful VPF system, Chiller selection
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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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