This is a COMRAC lesson for You

1. GOOD MORNING

2. ACTIVITY:
GUESS IT OR DANCE IT!

3. Mechanics:
1. Players will pass the crumpled paper around.
2. When you receive the crumpled paper, you will
be guessing the pictures that we will provide and
flash on the screen.
3. If you didn’t want to answer you may choose
between, call a friend or dance.
4. Players will continue passing the crumpled paper
until everyone has had a turn answering a
questions.
5. Enjoy!

8. Four Basics Components of
Refrigeration

9. Learning objective:
At the end of this lesson, the student must
have to:
Describe the relationship among basics
components of refrigerants

11. COMPRESSOR
 The heart of the system.
 It compresses the low
pressure refrigerant
vapor from the
evaporator and
compresses it into a high
pressure vapor.

12. CONDENSER
Cools and condenses the
high-pressure refrigerant
vapor in a high- pressure
liquid.
The condenser prepares
the refrigerant for the
expansion process, ensuring
it’s in correct state
effectively absorb heat in
the evaporator.

13. EXPANSION VALVE
( METERING DEVICE)
Reduces the pressure and
temperature of the high-
pressure liquid refrigerant.
The expansion valve controls
the flow of refrigerant in
regulating the cooling
capacity of the system.

14. EVAPORATOR
Absorbs heat and
evaporates the low-pressure
liquid refrigerant into a low-
pressure vapor.
The evapotor is where the
actual cooling effect occurs.
It extracts heat from the
refrigerant.

15. The relationship between components:
The four components work together in a
continuous cycle.
The key to the refrigeration cycle is the
controlled changes in pressure and
temperature of the refrigerant as it moves
through the system.

16. THANK YOU!

17. 1. What is the primary function of s compressor
in the refrigeration cycle?
a. to cool the refrigerant
b. to condense the refrigerant
c. to increase the pressure and temperature of
the refrigerant
d. to expand the refrigerant

18. 2. In which component does the refrigerant
release heat and change from gas to a liquid?
a. compressor
b. evaporator
c. expansion valve
d. condenser

19. 3. What is the role of expansion valve or
metering device?
a. to compress the refrigerant
b. to control the flow of refrigerant into
evaporator
c. to condense the refrigerant
d. to evaporate the refrigerant

20. 4. Where does the refrigerant absorb heat and
change from liquid to gas?
a. condenser
b. compressor
c. expansion valve
d. evaporator

21. 5. What is the purpose of the refrigerant in the
refrigeration system?
a. to lubricate the compressor
b. to transfer heat
c. to insulate the system
d. to control the temperature

22. 6. What type of heat transfer occurs primarily in the
condenser?
a. conduction
b. convention
c. radiation
d. all of the above

23. 7. What happens to the refrigerant’s pressure as
it passes through the expansion valve?
a. it increases significantly
b. it remains constant
c. it decreases significantly
d. it fluctuates unpredictably

24. 8. In vapor- compression refrigeration cycle,
where does the greatest temperature occur?
a. compressor
b. condenser
c. expansion valve
d. evaporator

25. 9. The refrigeration cycle is a _____ process.
a. one-way
b. continuous
c. intermittent
d. static

26. 10. What is the refrigerant’s state when it leaves the evaporator?
a. liquid
b. gas
c. solid
d. plasma