Distribution piping, Pump per chiller | Trane SYS-APM001-EN specification

Figure 9. Pump per chiller

Pump

Load

Figure 10. Manifolded pumps

Manifolded

Pumps

Load

SYS-APM001-EN

Primary System Components

•accommodates the total pressure (static head plus dynamic head) on system components such as the chiller’s evaporator, valves, etc.

Note that the pump heat is added to the water and must be absorbed by the chiller. Generally, this represents a very small temperature increase.

Multiple pumps are often used for redundancy. Depending on the terminal control devices and system configurations, the chilled-water pumps may be either constant- or variable-flow.

As previously stated, pumps may be either on the inlet or the outlet of the chiller, as long as the inlet of the pump experiences an adequate, positive suction pressure. In applications where there is a significant liquid column head (for example, a high-rise building), the pump is often located at the chiller’s outlet so that the evaporator bundle is subject only to the static head (rather than the static head plus the dynamic head added by the pump). The need for high-pressure water boxes on the chiller can be eliminated.

Conversely, an advantage of locating the pump at the chiller’s inlet is that if the pump motor rejects its heat to the water, the heat can be removed directly by the chiller. The chiller does not need to compensate for the pump heat by making colder water.

Pump per chiller

In either a primary–secondary or variable-primary-flow system, using one pump per chiller simplifies system hydraulics (Figure 9). The pump can be selected to produce the flow and pressure drop necessary for the specific chiller. Bringing on additional pumps changes system hydraulics, but only minimally. One drawback of such a system is a lack of redundancy, since the pump and chiller are dedicated to one another. This may be overcome by using a spare pump, pipes, and valves so that the spare pump could work with any chiller during emergency conditions.

Manifolded pumps

In an effort to resolve the redundancy consideration, some designers prefer to manifold pumps and provide n+1 pumps, where n is the number of chillers (Figure 10). Such an arrangement allows any pump to be used with any chiller. However, system hydraulics become more complicated. Unless all piping runs and evaporator pressure drops are equal, the amount of water flowing to each chiller will differ. As discussed in “Moderate ’low ΔT syndrome’" on page 68, manifolded pumps present a control opportunity when low ΔT is experienced.

Either pump configuration can be successful; one pump per chiller simplifies the hydraulics, while manifolded pumps allow redundancy.

Distribution piping

By itself, the distribution system is easy to understand. Figure 11 shows a simplified distribution system consisting of multiple cooling coils, each controlled by a thermostat that regulates the flow in its respective coil. The

Chiller System Design and Control

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.

Trane SYS-APM001-EN manual Distribution piping, Pump per chiller, Manifolded pumps

Models: SYS-APM001-EN