Chapter 123 Flashcards
What is used as the liquid absorbent in ammonia absorption systems?
Water
The heat absorbed by contact with chilled water causes the ammonia to boil into a?
low pressure, low temperature vapour
After the water has boiled off from the lithium bromide where does the concentrated lithium bromide go?
to the absorber
The absorber is equipped with a pump to speed the absortion of?
Water vapour
In an ammonia absorption, the vaporized ammonia is absorbed by the ______ aqua.
weak
At what temperature is the evaporator in a lithium bromide absorption system kept?
4 to 7 degrees celsius
What is an absorption refrigeration unit called when all the parts are under vacuum are seal welded?
hermetic chiller
In a lithium bromide system which of the following si the refrigerant?
water
What are disadvantages of the absorption refrigeration system in comparison to the compression system?
More equipment is required
more space is required
more cooling water is required
In ABSORPTION refrigeration the high pressure ammonia vapour leaves the:
generates and enters the condenser
The generator is used to convert the:
weak solution to a strong solution
What is the primary heat used for in an Absorption refrigeration system?
to evaporate the water out of the weak lithium bromide
What is lithium bromide called after it absorbs a quantity of water?
weak solution
The absolute pressure in the generator for a lithium bromide system is approx:
10 kPa
The ________ lithium bromide has the ability to absorb water vapour readily.
strong
