0
SEMINAR
ON
“VAPOUR COMPRESSION REFRIGERATION”
GUIDED BY:- PREPARED BY:-
Mr. Devendra Bhandari Ujjwal Nautiyal
B.Tech(ME) I...
Refrigeration
 Vapour Compression Refrigeration
 Refrigeration is a process of removal of heat from a
substance at a temperature lower than the
surrounding with the aid ...
*
*In a refrigerator, a medium called Refrigerant
continuously extracts the heat from the
refrigerator which is to be kept...
Unit of Refrigeration & Ice making
Capacity
 The capacity of a refrigeration system is expressed in
tons of refrigeration...
Coefficient of
Performance
The coefficient of performance(briefly written as C.O.P.)
is the ratio of desired effect to th...
T1=Tsurr
Source T1
T2<Tsurr
Sink T2
R Work Input,W=Q1-Q2
Heat Absorbed, Q2
Heat Rejected, Q1
Refrigerator is a
reversed h...
PARTS OF REFRIGERATOR
Parts of
Refrigerator
Evaporator Compressor Condenser
Expansion
Valve
Types of Refrigeration
System
Refrigeration
System
Vapour
Compression
Refrigeration
System
Vapour
Absorption
Refrigeration...
11
Type of Refrigeration
Vapour Compression Refrigeration
Refrigeration cycle
Condenser
Evaporator
High
Pressure
Side
Low
...
12
Type of Refrigeration
Vapour Compression Refrigeration
Refrigeration cycle
Low pressure liquid refrigerant in
evaporato...
13
Type of Refrigeration
Vapour Compression Refrigeration
Refrigeration cycle
The superheated vapour enters the
compressor...
14
Type of Refrigeration
Vapour Compression Refrigeration
Refrigeration cycle
The high pressure superheated gas
is cooled ...
15
Type of Refrigeration
Vapour Compression Refrigeration
Refrigeration cycle
Liquid passes through expansion device,
whic...
Advantages
 Very mature technology.
 It has very less running cost.
 It has smaller size for the given capacity of refr...
17
Seminar
on
“Vapour Compression
Refrigeration”
THANK YOU
FOR YOUR ATTENTION

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Seminar presentation on Vapour Compression Refrigeration

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  1. 1. SEMINAR ON “VAPOUR COMPRESSION REFRIGERATION” GUIDED BY:- PREPARED BY:- Mr. Devendra Bhandari Ujjwal Nautiyal B.Tech(ME) II sem 1014366(38)
  2. 2. Refrigeration  Vapour Compression Refrigeration
  3. 3.  Refrigeration is a process of removal of heat from a substance at a temperature lower than the surrounding with the aid of external work.  In a refrigeration system, the rate at which the heat is absorbed in a cycle from the interior space to be cooled is called Refrigerating Effect. Refrigeration
  4. 4. * *In a refrigerator, a medium called Refrigerant continuously extracts the heat from the refrigerator which is to be kept cool at temperatures less than the atmosphere & finally rejects to it. *Refrigerant acts as a heat exchange medium. *e.g.- Ammonia, Freon, Methyl Chloride, Carbon dioxide, Isobutane.
  5. 5. Unit of Refrigeration & Ice making Capacity  The capacity of a refrigeration system is expressed in tons of refrigeration which is the unit of refrigeration.  A ton of refrigeration is the quantity of heat absorbed in order to form one ton of ice in 24 hours when the initial temperature of water is 0°c.  1 Ton of Refrigeration = 210 kJ/min = 3.5kW  Ice making capacity is the capacity of the refrigerating system to make ice beginning from water to solid.  S.I. unit of ice making capacity is kg/hr.
  6. 6. Coefficient of Performance The coefficient of performance(briefly written as C.O.P.) is the ratio of desired effect to the work input. Mathematically, (C.O.P.)refrigerator = Desired effect = Q2____ Work Input Q1-Q2
  7. 7. T1=Tsurr Source T1 T2<Tsurr Sink T2 R Work Input,W=Q1-Q2 Heat Absorbed, Q2 Heat Rejected, Q1 Refrigerator is a reversed heat engine. It extracts Q2 amount of heat from sink & releases Q1 amount of heat to source. Input—Work(Q1-Q2) Output– Heat Refrigerator
  8. 8. PARTS OF REFRIGERATOR Parts of Refrigerator Evaporator Compressor Condenser Expansion Valve
  9. 9. Types of Refrigeration System Refrigeration System Vapour Compression Refrigeration System Vapour Absorption Refrigeration System
  10. 10. 11 Type of Refrigeration Vapour Compression Refrigeration Refrigeration cycle Condenser Evaporator High Pressure Side Low Pressure Side Compressor Expansion Device 1 2 3 4
  11. 11. 12 Type of Refrigeration Vapour Compression Refrigeration Refrigeration cycle Low pressure liquid refrigerant in evaporator absorbs heat and changes to a gas Condenser Evaporator High Pressure Side Low Pressure Side Compressor Expansion Device 1 2 3 4
  12. 12. 13 Type of Refrigeration Vapour Compression Refrigeration Refrigeration cycle The superheated vapour enters the compressor where its pressure is raised Condenser Evaporator High Pressure Side Low Pressure Side Compressor Expansion Device 1 2 3 4
  13. 13. 14 Type of Refrigeration Vapour Compression Refrigeration Refrigeration cycle The high pressure superheated gas is cooled in several stages in the condenser Condenser Evaporator High Pressure Side Low Pressure Side Compressor Expansion Device 1 2 3 4
  14. 14. 15 Type of Refrigeration Vapour Compression Refrigeration Refrigeration cycle Liquid passes through expansion device, which reduces its pressure and controls the flow into the evaporator Condenser Evaporator High Pressure Side Low Pressure Side Compressor Expansion Device 1 2 3 4
  15. 15. Advantages  Very mature technology.  It has very less running cost.  It has smaller size for the given capacity of refrigeration.  It can be employed over a large range of temperatures.  The C.O.P. is very high. Disadvantages  Many systems still use HCFC refrigerants, which contribute to depletion of ozone layer.  Initial cost is high.  The prevention of leakage of refrigerant is the major problem in vapour compression refrigeration. 16
  16. 16. 17 Seminar on “Vapour Compression Refrigeration” THANK YOU FOR YOUR ATTENTION 
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