Trane TRG-TRC011-EN manual Answers

Page 73

Answers

1Refrigerant (distilled water) and absorbent (lithium bromide)

2$ generator, % condenser, & expansion device, ' evaporator, ( absorber, ) heat exchanger

3Generator and condenser; evaporator and absorber

4Below atmospheric pressure

5Condenser and evaporator

6To preheat the dilute solution returning to the generator, which reduces the heat energy required to boil the refrigerant, and precool the concentrated solution returning to the absorber, which reduces the flow rate of cooling water required to absorb heat in the absorber.

7High-temperature generator, high-temperature heat exchanger, and possibly an additional pump (depending on the type of flow cycle used)

8Direct-fired absorption chiller (with an auxiliary heating bundle)

9Decrease in vapor pressure

10The process of lithium bromide leaving the solution as a solid when the absorbent solution is cooled below its saturation temperature.

11Air leaking into the chiller, avoided by quality construction and automatic purging. Cooling water that is too cold or that fluctuates in temperature too rapidly, avoided by using improved microelectronic controls or a cooling tower bypass. Electric power failure, avoided by gravity-fed dilution cycles.

12To determine if corrosion inhibitor and performance additive levels are within acceptable limits. Air leaking into the chiller can deplete the corrosion inhibitor.

13False. Many new chiller and control designs are able to maintain control of the cycle, even in situations where the cooling-water temperature may be highly variable.

14Quantity of combustion air required, venting of combustion exhaust, sizing of the main gas train, requirements for low NOx emissions, and compliance with ASHRAE Standard 15.

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TRG-TRC011-EN

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Contents Air Conditioning Clinic Absorption Water Chillers Absorption Water Chillers Preface Contents TRG-TRC004-EN Introduction TRG-TRC011-EN Period one Absorption Refrigeration CyclePeriod one Reject heat Heat energy Absorption System Fluids High affinity for water refrigerant Components of the Absorption Cycle Conditions Steam or Hot waterrefrigerant vapor Generator Condenser Refrigerant then flows into the evaporator pan Absorber spray pump Solution Heat Exchanger Dilute Generator pump Equilibrium Chart Heat Solution temperature Period two Absorption Chiller TypesSingle-Effect Chiller Absorber Evaporator spray pump Spray pump Generator pump Double-Effect Chiller Vapor Low Temperature condenser Cooling Generator Water Evaporator Absorber Low-temperature generator pump Generator pump Absorption Chiller Types Direct-Fired Chiller Evaporator High-temperature high-temperature Generatorgenerator pump Chiller/Heater Absorption Chiller Types Changeover Absorption Chiller Types Period three Capacity ControlPeriod three Energy valve Generator Crystallization 10C 37.8C Capacity Control Capacity Control Capacity Control Heat exchanger bypass Evaporator pan Purge System Isolation valve Period four Maintenance ConsiderationsPeriod four Maintenance Considerations Test run with alternate fuel, if dual-fuel burner Maintenance Considerations Maintenance Considerations Corrosion inhibitor and performance additive recommendations Period five Application ConsiderationsCooling-Water Temperature Limitations Combination Chiller Plants 58F Special Considerations for Direct-Fired Chillers Application Considerations Equipment Rating Standards Period six ReviewPeriod six Review Review Review Questions for Period QuizQuiz TRG-TRC011-EN Answers Glossary Glossary Glossary Trane Company
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