Fabrication Of Domestic Deep Freezer

1 to 2 = compression vapor.
2 to 3 = vapor super heat removed in condenser.
3 to 4 = vapor converted to liquid in condenser.
4 to 5 = liquid flashes into liquid and vapor across expansion value.
5 to 1 = liquid and vapor converted to all vapor in evaporator.
3.3.1    THE COMPRESSOR.
    Work is done in the compressor. The vapor gets further super heated so the temperature of the discharge vapor will be much higher than the temperature of the saturated vapor at the discharge pressure (paunken mike (1999)). Saturation temperature corresponding to the pressure in 110of (43.3oc) but the temperature of the discharge vapor will be around 180of (82.2oc) condensing job and without undue heating.
The compressor is the heart of refrigeration system. It pumps heat through the system in the form of heat laden refrigerant vapor. A compressor can be considered as a heat pump.
    It reduces the pressure on the low pressure side of the system, which includes the evaporator and increases the pressure on the high pressure side of the system.
Examples of compressor used are:
1)    The reciprocating.
2)    The rotary
3)    The scroll compressor.
3.3.2    THE CONDENSER.
    In system involving heat transfer, a condenser is a device or unit to condense a substance from its gaseous to its liquid state, by cooling it. In so doing the latent heat is given up by the substance, and will transfer to the condenser coolant. Condensers are typically heat exchanges refrigerator uses a condenser to get rid of heat extracted from the interior of the unit to the outside air. Condensers can be used as various system such as:
I.    Air conditioning system.
II.    Industrial chemical: chemical process such as distillation, steam power plants and other heat exchange systems.
The condenser rejects heat from the refrigeration system that the evaporator absorbed and compressor pumped the condenser summarily de-superheats condenses and sub-cool the refrigerant. (paunken mike, (1999))
The gas entering the condenser is very hot compared to the surrounding air that a heat exchange begins to occur immediately in the air. With about 90% of the refrigerant condensed, the refrigerant in the pipe is almost pure liquid. The liquid can still give off at 1250f, the liquid is said to be sub cool to condenser and perform three important things which are:
-    The hot gas from the compressor is de-super heated.
-    The refrigerant is condensed from vapor to liquid.
-    The liquid refrigerant temperature may then be lowered below the condensing temperature, or sub-cooled to between 100f and 20of below the condensing temperature.