Trane TRG-TRC011-EN manual Heat

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period one

Absorption Refrigeration Cycle

notes

	steam or		condenser
	hot water
			cooling
	generator
			water

		'
	evaporator	&
	evaporator	chilled
		chilled
	%	water

heat			expansion
exchanger			expansion
exchanger			device
	(		device
absorber	(	)	$

Figure 19

A diagram of a typical absorption refrigeration cycle can be superimposed on this equilibrium chart to demonstrate the function of each component in the system.

Realize that the equilibrium chart can only be used for those portions of the cycle where the lithium bromide solution is present. It cannot be used for the condenser or evaporator sections. The properties of the refrigerant as it passes through the condenser, expansion device, and evaporator can be analyzed using a pressure–enthalpy chart for the refrigerant (water, in this case).

16	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