Refrigeration basics part 1

1. What do you mean by REFRIGERATION?
Ans. It is the process of transfering heat from low temperature region to high temperature region .


2. What do you mean by term REFRIGERATOR ?
Ans. It is device the produces refrigeration .


3. What is the most common and frequently used REFRIGERATION CYCLE ?
Ans. VAPOUR -COMPRESSION REFRIGERATION CYCLE. In which refrigerant is vapourised and condensed alternately .
 Refrigerant is compressed in vapour phase .


4. What are the various REFRIGERATION  CYCLE ?
Ans. a.  VAPOUR -COMPRESSION REFRIGERATION CYCLE
        b.  GAS REFRIGERATION CYCLE in which refrigerant is in gasious phase throughout the        cycle.
        c. Cascade Refrigeration cycle in which more than one refrigerant is used .
        d. Vapour Absorption Refrigeration cycle in which refrigerant is mixed in liquid before it is compressed.
        e. Thermoelectric Refrigeration Cycle in which refrigeration is produced by supplying of electric current through two dissimilar metals.


5. What is the molecular formula for the most commonly used Refrigerant R134A ?

1,1,1,2 TETRAFLUOROETHANE

SOURCE: GENGEL BOLES THERMODYNAMICS, WIKIPEDIA