Trane TRG-TRC011-EN manual Absorption Chiller Types

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period two

Absorption Chiller Types

notes

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◆Problems with solution stability

◆Increased risk of corrosion problems

◆More expensive pressure vessel design requirements

◆Greater first cost due to added components

◆Larger physical size

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While they are presently not available, higher-effect absorption chillers are being studied for commercial use due their potential for higher COPs. Typical COPs for these triple-effect cycles are 1.4 to 1.5. Implementation of these cycles into commercial water chillers, however, includes difficulties such as the following.

νHigher solution temperatures create problems with stability of the absorbent solution and performance additives, as well as additional material corrosion problems.

νIn some cases, higher operating pressures which require high-cost pressure vessel designs.

νGreater first cost due to the need for additional pumps and heat exchangers.

νLarger physical size.

As mentioned earlier, other cycles and fluid combinations are also being studied for commercial use. The focus of this clinic, however, is limited to water chillers that use a lithium bromide-and-water solution.

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Contents Air Conditioning Clinic Absorption Water Chillers Absorption Water Chillers Preface Contents TRG-TRC004-EN Introduction TRG-TRC011-EN Absorption Refrigeration Cycle Period onePeriod 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 Absorption Chiller Types Period twoSingle-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 Capacity Control Period threePeriod three Energy valve Generator Crystallization 10C 37.8C Capacity Control Capacity Control Capacity Control Heat exchanger bypass Evaporator pan Purge System Isolation valve Maintenance Considerations Period fourPeriod four Maintenance Considerations Test run with alternate fuel, if dual-fuel burner Maintenance Considerations Maintenance Considerations Corrosion inhibitor and performance additive recommendations Application Considerations Period fiveCooling-Water Temperature Limitations Combination Chiller Plants 58F Special Considerations for Direct-Fired Chillers Application Considerations Equipment Rating Standards Review Period sixPeriod six Review Review Review Quiz Questions for PeriodQuiz TRG-TRC011-EN Answers Glossary Glossary Glossary Trane Company