For a copy of ASHRAE Guideline 22 and other ASHRAE publications, visit the ASHRAE bookstore at www.ashrae.org/ bookstore.

SYS-APM001-EN

Application Considerations

Guidelines for system efficiency monitoring

ASHRAE Guideline 22 Instrumentation for Monitoring Central Chilled-Water Plant Efficiency6 was first published in June 2008. It states:

Guideline 22 was developed by ASHRAE to provide a source of information on the instrumentation and collection of data needed for monitoring the efficiency of an electric-motor-driven central chilled- water plant. A minimum level of instrumentation quality is established to ensure that the calculated results of chilled-water plant efficiency are reasonable. Several levels of instrumentation are developed so that the user of this guideline can select that level that suits the needs of each installation.

The basic purpose served by this guideline is to enable the user to continuously monitor chilled-water plant efficiency in order to aid in the operation and improvement of that particular chilled-water plant, not to establish a level of efficiency for all chilled-water plants. Therefore, the effort here is to improve individual plant efficiencies and not to establish an absolute efficiency that would serve as a minimum standard for all chilled-water plants.

Guideline 22 includes a discussion of:

•types of sensors and data measurement devices

•calibration

•measurement resolution, accuracy, and uncertainty

•calculation methods

•example specification

•examples of measured long-term performance

Guideline 22 recommends tracking and archiving the following over the life of the plant, in addition to normal equipment operating trends. The ability to obtain this information is dependent on the instrumentation and data measurement capabilities of the system.

1Average day’s outdoor air temperature (obtain the outside air temperature every 30 minutes and find the average of these samples each day)

2Day’s high temperature

3Day’s low temperature

4Day’s high wet-bulb temperature (calculate from temperature and enthalpy)

5Chilled-water supply temperature (average, max and min if chilled-water temperature is not fixed)

6Total ton-hours (kWh) production of chilled water for the day

7Total kWh power input for each component for the day

8Average kW/ton (COP) for the plant for the day

Chiller System Design and Control

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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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