Absorption: Level 2 Flashcards
Compression refrigeration systems use the mechanical energy of ________ to achieve refrigeration
compression
Absorption refrigeration systems use _____ energy to achieve refrigeration
heat
A substance that soaks up refrigerant returning from the evaporator is called a _________
absorbent
A substance that transfers heat from a conditioned space to an unconditioned space is called a ________
refrigerant
A substance that soaks up a refrigerant and lowers their combined pressure is an _________
absorbent
When a solid attracts and holds another substance on its outer surfaces, the process is called __________
adsorption
When one substance attracts and combines with another substance to form a uniform solution, the process is called ___________
absorption
Which of the following may be installed between high and low sides of an absorption system?
- check valves
- pump
- liquid traps
- all of the above
all of the above
T or F
An absorbent will absorb refrigerant when heated and released when cooled
false
T or F
In absorption chillers, the refrigerant is typically a form of sodium and the absorbent is water
false
T or F
Water may act as a refrigerant in some systems and as an absorbent in another
true
T or F
Continuous cycle absorption systems are often used in domestic refrigerators in recreational vehicles and in year-round air conditioning of both homes and large buildings
true
T or F
The capacity of air-cooled chillers varies with ambient air temperature and the temperature of the chilled water
True
T or F
An increase in the temp of the air used to cool the condenser in a residential absorption chiller will result in a decrease in the overall capacity of the system
true
T or F
A double-effect absorption chiller system uses lithium bromide as the refrigerant and water as the absorbent
False
T or F
All absorption systems use heat energy to produce the refrigeration effect
true
T or F
The upper shell of a lithium bromide absorption chiller contains the generator and condenser
true
T or F
Evaporative cooling systems are most effective in dry climates
true
If a substance tends to absorb another, it is said to have an ________ for the other substance
affinity
When an absorbent becomes saturated with the refrigerant, it is called a ______ solution
strong
When a refrigerant mixture is not fully saturated, it is referred to as a _____ solution
weak
