Trane trg-trc005-en manual Evaporator Control

Page 27

period three

Evaporators

notes

Evaporator Control

IEvaporator capacity is influenced by:

K Temperature difference between refrigerant and air or water being cooled

K Flow rate of air or water through evaporator K Flow rate of refrigerant through evaporator

Figure 30

Evaporator Control

The rate of heat exchange within an evaporator is governed by (1) the temperature difference between the refrigerant and the air or water being cooled, (2) the flow rate of the air or water through the evaporator, and (3) the flow rate of the refrigerant through the evaporator.

In comfort-cooling applications, it is necessary to balance the capacity of the system with the ever-changing load. The flow rate and temperature of the air or water being cooled are typically controlled to respond directly to the system load. A constant-volume system delivers a constant quantity of air to the space and, to maintain the required space temperature at all load conditions, varies the temperature of this air. In contrast, a variable-air-volume (VAV) system delivers air at a constant temperature and varies the airflow to maintain the required space temperature at all load conditions.

These are variables that the evaporator must respond to rather than directly control. The most common method of controlling the capacity of the evaporator at part load is to control the temperature and/or flow rate of the refrigerant through the system by unloading or cycling compressors. To provide stable part-load operation and balance compressor unloading with the capacity of the evaporator, some direct form of evaporator capacity control may also be required.

20

TRG-TRC005-EN

Page 26 Page 28
Image 27
Page 26 Page 28
Contents Air Conditioning Clinic Refrigeration System Components One of the Fundamental Series Comment CardBusiness Reply Mail Refrigeration System Components Refrigeration System Components PrefaceContents TRG-TRC005-EN Vapor-Compression Refrigeration IntroductionRefrigeration Cycle Refrigeration CyclePeriod one Condenser Condensers Air-Cooled CondenserAir-Cooled Condensers Effect of Subcooling Centrifugal Fan Air-Cooled Condenser Evaporative CondenserEvaporative Condensers Water-Cooled Condensers Water-Cooled CondenserCooling Tower Condenser Control Condenser CapacityCondenser Control Condensing Temperature Control Vary Condenser Water Flow Rate Vary Entering Water TemperatureCooling Tower Bypass Condenser Flooding Control Air-Cooled Condenser ControlCondensers Evaporators Finned-Tube EvaporatorFinned-Tube Evaporators Turbulent Flow Superheat Shell-and-Tube Evaporators Shell-and-Tube EvaporatorEvaporator Control Evaporator ControlFace-Split Arrangement Finned-Tube Evaporator Control80ºF Intertwined Arrangement Row-Split Arrangement Shell-and-Tube Evaporator Control Expansion Device Expansion DevicesTXV Control Thermostatic Expansion ValveTXV TXV TXV Operation Psia TXV Too much superheat Superheat SettingAccessories Solenoid ValveSolenoid Valve Period five Liquid-Line Filter Drier Liquid-Line Filter DrierSealed type Moisture-Indicating Sight Glass Moisture-Indicating Sight GlassSuction Line Filter Suction Line FilterHot Gas Muffler Hot Gas MufflerShutoff Valve Shutoff ValveAccess Port Access PortReview-Period One ReviewAir-cooled condenser Review-Period TwoReview-Period Four Review-Period ThreeReview-Period Five For more information, refer to the following references Questions for Period QuizQuiz To C To G AnswersGlossary Glossary Glossary Trane Company

trg-trc005-en specifications

The Trane TRG-TRC005-EN is a sophisticated and versatile HVAC control system designed for modern commercial buildings. As part of Trane's innovative lineup, this device offers advanced functionalities to enhance energy efficiency, comfort, and operational ease. The TRG-TRC005-EN is equipped with cutting-edge technologies that make it an essential tool for facility managers and HVAC professionals.

One of the main features of the TRG-TRC005-EN is its comprehensive control capabilities. This system allows for precise monitoring and management of heating, ventilation, and air conditioning systems, ensuring optimal indoor air quality and thermal comfort. With its intuitive interface, users can easily navigate through various settings, enabling them to customize the environment per their specific needs.

The TRG-TRC005-EN integrates seamlessly with Trane’s building management systems, offering enhanced connectivity for efficient control. This connectivity allows for real-time data analytics, ensuring users can make informed decisions based on the system’s performance. Furthermore, the device supports both wired and wireless communication protocols, enhancing its flexibility for different building setups.

Energy efficiency is a hallmark of the TRG-TRC005-EN. It features advanced algorithms that actively optimize energy usage, resulting in reduced operational costs. The system can assess external weather conditions and adjust HVAC settings accordingly, promoting energy conservation without compromising comfort.

Additionally, the TRG-TRC005-EN includes built-in diagnostics to monitor system performance continuously. This feature helps in early detection of potential issues, allowing for timely maintenance and minimizing downtime. The diagnostic capabilities extend to monitoring energy consumption, providing valuable insights for energy management strategies.

Another significant characteristic of the TRG-TRC005-EN is its user-centered design. The system offers customizable user roles, allowing different levels of access depending on the user’s needs. This aspect not only streamlines operation but also enhances security within the facility.

In summary, the Trane TRG-TRC005-EN is a powerful HVAC control solution that combines advanced technologies with user-friendly features. Its ability to optimize energy efficiency, enhance comfort, and provide real-time monitoring makes it an invaluable asset for managing modern commercial buildings efficiently. With the TRG-TRC005-EN, users can be assured of a reliable, effective, and intelligent system that meets the demands of today’s interconnected world.
Top Page Image Contents