Trane TRG-TRC012-EN ReviewPeriod 2

TRG-TRC012-EN 41

period six

Review

notes

In Period 2, the refrigeration cycle of the helical-rotary water chiller was

examined on a pressure-enthalpy chart. Also, the performance characteristics

of the various refrigerants were compared.

In Period 3, the operation of the modulating slide valve was explained. The slide

valve is one method by which a helical-rotary compressor’s capacity is

controlled.

Review—Period 2

pressure

enthalpy

evaporator

evaporator 1

condenser

compressor

expansion

device

device liquid/vapor

liquid/vapor

separator

Figure 58

Review—Period 3

axial

discharge

port

slide valve

radial

discharge

port

Figure 59

Contents

Main Page Preface A Trane Air Conditioning Clinic Contents Page Introduction Chilled Water System helical-rotary absorption centrifugal Introduction water-cooled air-cooled Helical-Rotary Water Chillers period one period one Helical-Rotary Water Chiller Compressor Page Page Page Oil Separator Oil Separator Oil Supply System notes Condenser Condenser Expansion Device Electronic Expansion Valve Liquid/Vapor Separator Orifice Plates Liquid/Vapor Separator notes Evaporator Flooded Evaporator Direct Expansion Evaporator Controls and Starter Controls And Starter period two Refrigeration Cycle period two notes p-h) PressureEnthalpy ( liquid vapor Refrigeration Cycle Refrigerants Thermodynamic Characteristics period three period three Slide Valve Full Load Part Load Unloading Slide Valve Operation period four period four Maintenance Considerations ASHRAE Guideline 3 Page Mechanical Components Heat Transfer Surfaces notes Fluid Analysis period five Air-Cooled or Water-Cooled Condensing period five Air-Cooled or Water-Cooled water-cooled Comparison air-cooled notes Condensing Temperature Control Condensing Temperature Control Cooling Tower Bypass Constant or Variable Evaporator Water Flow Constant or Variable Flow Limitations Short Evaporator Water Loops Short Evaporator Water Loops Short Evaporator Water Loops Equipment Certification Standards ARI Standard 550/590 ARI Standard 550/590 40 Lets review the main concepts that were covered in this clinic on helical-rotary water chillers. period six ReviewPeriod 1 period six ReviewPeriod 2 ReviewPeriod 3 ReviewPeriod 4 ReviewPeriod 5 Engineers Newsletter Quiz Questions for Period 1 Questions for Period 2 Quiz Questions for Period 3 Questions for Period 4 Questions for Period 5 Answers Page Glossary BUSINESS REPLY MAIL Comment Card Helical-Rotary Water Chillers Response Card