The liquid refrigerant in the evaporator absorbs its latent heat of vaporization, and in the process changes from a liquid to a vapor. The gas refrigerant within the condenser rejects its latent heat of vaporization, thus changing from a gas to a liquid.
What happens to refrigerant when they change from liquid to vapor?
If one attempts to lower the temperature of a saturated vapor below its saturation temperature, condensation will occur. ... The heat energy that causes a liquid refrigerant to change to a vapor at a constant saturation temperature for a given pressure is referred to as a latent heat process .
Where in the A C system does refrigerant convert from liquid to vapor?
As its name implies, refrigerant in the evaporator “evaporates”. Upon entering the evaporator, the liquid refrigerant’s temperature is between 40° and 50°F; and without changing its temperature; it absorbs heat as it changes state from a liquid to a vapor.
Where does the refrigerant change all the way to a liquid?
On its way through the condenser the refrigerant saturated vapour condenses to a saturated liquid due to the stored latent heat in the refrigerant transferring to the surrounding atmosphere via the condenser coil metal walls.
Which way does refrigerant flow?
Some of the low pressure liquid refrigerant instantly boils off forming “flash gas”. ... At the outlet of the evaporator 100% of the low pressure vapor flows back through the suction line to the compressor .
What kind of energy does the condenser remove from the refrigerant?
Condenser: The condenser removes heat given off during the liquefication of vaporized refrigerant. Heat is given off as the temperature drops to condensation temperature. Then, more heat (specifically the latent heat of condensation) is released as the refrigerant liquefies.
How does refrigerant go from gas to liquid?
When the Freon gas is compressed, its pressure rises, making it very hot. Next, the hot Freon gas moves through a series of coils, which has the effect of lowering its heat and converting it to liquid. The Freon liquid then flows through an expansion valve , which causes it to cool down until it evaporates.
Is refrigerant liquid or gas?
The refrigerant, a chemical compound that changes easily from liquid to a gas . When the refrigerant is pushed into the compressor, it is a low pressure gas.
What are the four stages of refrigeration?
- Stage 1: Evaporator Coil. Your refrigerant’s journey begins at your evaporator coil, which is located inside the indoor unit in your home. ...
- Stage 2: Compressor. ...
- Stage 3: Condenser Coil. ...
- Stage 4: Expansion Chamber.
What is the state of refrigerant leaving the condenser?
As the refrigerant moves through the condenser it begins to cool, and changes state. At this point the refrigerant is a mixture of liquid and vapor. As the refrigerant exits the condenser, the refrigerant has now changed to all liquid .
What removes moisture from a refrigerant?
Drier is used to remove the moisture from the refrigerant. Sometimes it is also referred as dehydrator or dryer. It is necessary to remove moisture from the system otherwise it may freeze inside the tube causing the flow of refrigerant to be restricted.
What will happen if liquid refrigerant enters the suction side of the compressor?
Most hermetic compressor suction lines end at the shell of the compressor. If liquid refrigerant is entering the compressor, liquid will fall directly into the crankcase oil and eventually be flashed . ... This causes oil foaming and excessively high crankcase pressures.
Which liquid is used as refrigerant?
Low-molecular weight hydrocarbons, hydrofluorocarbons (HFCs), ammonia and nitrogen are commonly used as the refrigerant; since 1987, chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs) are being phased out [7,8]. Single cycles, such as that shown in Figure 6.6, can cool process streams to around −40 °C.
How do I know if my liquid line filter drier is clogged?
Temperatures Drop Across the Filter Drier
A symptom of a clogged liquid line filter drier is a temperature drop across the filter drier. Filter driers are typically shaped like a hot dog and are about the same diameter.
Is the evaporator on the high side of the system?
The direct transfer of heat from one substance to another substance that it is touching. A belt- or electrically driven device designed to increase refrigerant pressure and cause refrigerant to travel through the air-conditioning system. Tech A says that the evaporator is on the high side of the system.
What happens if you put a filter drier backwards?
When installing a new filter drier, an arrow on the filter drier’s housing will indicate which direction refrigerant is designed to flow. If installed backwards, the filter drier will become useless . ... Overheating may scorch the internal filters, drying agents, and other important parts of the dryer.
