B4 Refrigeration Equipment Flashcards
What are the four basic components of an absorption refrigeration system?
Generator, condenser, evaporator, absorber
What is the purpose of the generator in an ammonia absorption refrigeration system?
To heat the refrigerant so the ammonia vaporizes and separates from the water solution
What is the purpose of the absorber in an ammonia absorption refrigeration system?
To attract – and absorb – the refrigerant from the evaporator.
What is the purpose of the evaporator in an ammonia absorption refrigeration system?
To mix the liquid refrigerant (ammonia) with pressurized hydrogen atmosphere and causing the ammonia to evaporate.
What is the purpose of the condenser in an ammonia absorption refrigeration system?
To collect and remove heat from the separated ammonia causing it to condense into a liquid.
What happens in a lithium bromide absorption system when you heat the weak lithium bromide solution?
The water will evaporate and rise, and the lithium bromide will sink to the bottom
What two components of an absorption chiller are found in the topmost chamber?
Condenser and generator
What two components of an absorption chiller are found in the bottommost chamber?
Evaporator and absorber
In an absorption chiller, where does the water vapour end up right after it is separated from the lithium bromide?
The condenser section
In an absorption chiller, where does the lithium bromide end up after it is separated from the water?
The absorber section
n an absorption chiller, what happens to the condensed water as it gets sprayed over the surface of the evaporator?
The water evaporates and transfers the thermal energy out of the chilled water line
Approximately what temperature will the chilled water be as it leaves the evaporator?
7°C
In an absorption chiller, what causes the vacuum in the absorber chamber?
The attraction between the water and lithium bromide particles in the absorber
