Trane trg-trc005-en manual Shell-and-Tube Evaporators

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period three

Evaporators

notes

Shell-and-Tube Evaporator

chilled

 

 

 

 

water

 

 

 

 

supply

 

chilled

 

baffles

water

 

return

 

 

 

 

 

 

refrigerant

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

vapor

 

 

 

 

 

 

 

 

liquid/vapor

 

 

 

 

 

tube bundle

 

 

refrigerant

 

 

 

Figure 28

 

 

 

 

Shell-and-Tube Evaporators

Instead of producing cooled air, a shell-and-tube evaporator is used to produce chilled water. In this type of evaporator, the cool liquid refrigerant flows through the tubes and water fills the shell space surrounding the tubes. As heat is transferred from the water to the refrigerant, the refrigerant boils inside the tubes and the resulting vapor is drawn to the compressor. Water enters the shell at one end and leaves at the opposite end.

This chilled water is pumped to one or more heat exchangers to handle the system cooling load. These heat exchangers could be coils used to cool air or they could be some other load that requires chilled water.

Shell-and-Tube Evaporator

baffles

Figure 29

Baffles within the shell direct the water in a rising and falling flow path over the tubes that carry the refrigerant. This results in turbulence that improves heat transfer.

TRG-TRC005-EN

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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 Condensers CondensersAir-Cooled Condenser Effect of Subcooling Evaporative Condensers Centrifugal Fan Air-Cooled CondenserEvaporative Condenser Water-Cooled Condenser Water-Cooled CondensersCooling Tower Condenser Control Condenser ControlCondenser Capacity Condensing Temperature Control Vary Entering Water Temperature Vary Condenser Water Flow RateCooling Tower Bypass Air-Cooled Condenser Control Condenser Flooding ControlCondensers Finned-Tube Evaporators EvaporatorsFinned-Tube Evaporator 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 MufflerShutoff 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

trg-trc005-en specifications

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