Modern Ref. Chapter 6 Flashcards
Refrigerants are fluids that absorb _____ inside the refrigerated space and release the _____ outside
heat
high pressure causes the _______ of heat
rejection
low pressure causes the ________ of heat
absorption
the low side of the system is where heat is ______ and
_______
absorbed and removed
The compressor serves as the divider between the ____ side and ____ side of the system
low side and high side
High side of the system is where heat is ______ and ______
rejected and removed
What is an oil separators function?
Collects oil so too much does not get into the system
Condense removes the ______ heat from the refrigeration vapour allowing the vapour to condense back into a liquid
latent heat
What is a liquid receiver?
stores liquid refrigerant (usually on larger systems)
What us a liquid line?
tubing that carries liquid refrigerant from the condenser or liquid receiver to the metering device.
Liquid line filter-drier?
collects moisture, dirt, metal, and other debris to prevent any from entering the metering device
What is the metering device function?
Controls the flow of refrigerant into the evaporator
Where is the metering device located?
between the liquid line and the evaporator
What is the evaporators job?
absorb heat and turn refrigerant into vapour
What is an accumulator?
prevents liquid refrigerant from flowing through the suction line and into the compressor
What is the suction line?
tubing that carries refrigerant vapour from evaporator to compressor
What is the suction line filter-drier?
Same function as the liquid line filter-drier although it is on the low side of the system
_________ refrigerant is like a dry sponge that has the ability to soak up a lot of water
low-pressure liquid
________ refrigerant is like a soaking wet sponge that cannot absorb more water
low pressure vapour
From the metering device through the evaporator to the compressor is the ______ side of the system
low side
From the compressor exhaust through the condenser and liquid line to the metering device is the _____ side of the system
high side
Using suction, a compressor draws in refrigerant by creating _______ in the evaporator
low pressure
using the process of compression, a compressor increases refrigerant _____ and _______
pressure and heat content
Commonly used in different HVACR applications, ____ compressors use a back and forth to up and down motion
reciprocating
A heat exchange device designed to reject or expel heat is a
condenser
A condenser that uses a fan to remove heat more quickly is called a _______ condenser
forced air
Heat flow can be best described as flowing from _____ areas to ____ areas
hot areas to cold areas
A storage tank for liquid refrigerant on the high side of the system is called a
liquid receiver
A refrigeration system with a _____ metering device does not use a liquid receiver?
a) Capillary tube
b) Low-side float
c) automatic expansion valve
d) thermostatic expansion valve
a) capillary tube
Into which tank can a technician pump a refrigeration systems entire refrigerant charge to perform a service?
a) accumulator
b) evaporator
c) condenser
d) liquid receiver
liquid receiver
The high pressure line between condenser and metering device is called the _____ line
liquid
To protect a system from dirt, moisture, and metal, install a _______
filter-drier
A heat exchanged device designed to absorb heat is called a
evaporator
The instantaneous evaporation of liquid refrigerant in a evaporator is called
________
flash gas
A storage tank that traps liquid refrigerant on the low side of the system is a
accumulator
An accumulator will function best with its inlet positioned _____ the tank
at the top of
The ______ carries refrigerant from the evaporator to the compressor
suction line
