Trane trg-trc005-en manual Review-Period Three, Review-Period Four

Page 52

period six

Review

notes

Review—Period Three

finned-tube evaporator

shell-and-tube evaporator

Figure 64

Period Three presented the different types of evaporators and methods of evaporator control. The evaporator transfers heat from air, water, or some other fluid to the cool liquid refrigerant. The two common types of evaporators are finned-tube and shell-and-tube.

Review—Period Four

evaporator

remote bulb

external equalizer

distributor

TXV

Figure 65

Period Four reviewed the operation of the expansion device, specifically the thermostatic expansion valve. The expansion device is used to maintain the pressure difference between the high-pressure (condenser) and low-pressure (evaporator) sides of the system established by the compressor.

In addition, the thermostatic expansion valve (TXV) controls the quantity of liquid refrigerant entering the evaporator. It ensures that the refrigerant will be completely vaporized within the evaporator and maintains the proper amount of superheat in the system.

TRG-TRC005-EN

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Image 52

Contents

Air Conditioning Clinic Refrigeration System Components Comment Card One of the Fundamental SeriesBusiness Reply Mail Refrigeration System Components Preface Refrigeration System ComponentsContents TRG-TRC005-EN Introduction Vapor-Compression RefrigerationRefrigeration Cycle Refrigeration CyclePeriod one Condenser Air-Cooled Condenser CondensersAir-Cooled Condensers Effect of Subcooling Evaporative Condenser Centrifugal Fan Air-Cooled CondenserEvaporative Condensers Water-Cooled Condenser Water-Cooled CondensersCooling Tower Condenser Capacity Condenser ControlCondenser Control Condensing Temperature Control Vary Entering Water Temperature Vary Condenser Water Flow RateCooling Tower Bypass Air-Cooled Condenser Control Condenser Flooding ControlCondensers Finned-Tube Evaporator EvaporatorsFinned-Tube Evaporators Turbulent Flow Superheat Shell-and-Tube Evaporator Shell-and-Tube EvaporatorsEvaporator Control Evaporator ControlFinned-Tube Evaporator Control Face-Split Arrangement80ºF Intertwined Arrangement Row-Split Arrangement Shell-and-Tube Evaporator Control Expansion Devices Expansion DeviceThermostatic Expansion Valve TXV ControlTXV TXV TXV Operation Psia TXV Superheat Setting Too much superheatSolenoid Valve AccessoriesSolenoid 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 Muffler Shutoff Valve Shutoff ValveAccess Port Access PortReview Review-Period OneReview-Period Two Air-cooled condenserReview-Period Three Review-Period FourReview-Period Five For more information, refer to the following references Quiz Questions for PeriodQuiz Answers To C To GGlossary Glossary Glossary Trane Company