Vapour compression cycle 

Vapour compression cycle includes 

• Compressor 
• Condenser 
• Expansion valve 

Evaporator

Working principle

•  Compressor 

      In the compressor the refrigerant compressed with high pressure and temperature. 

• Condensser 

     In the condenser the refrigerant removed heat. 

• Expansion valve

In the expansion valve the pressure and temperature further reduces.

• Evaporator 

In the evaporator the  refrigerant  absorbed heat.

Compressor

Compressor is the heart of air conditioner. The varius types of compressors are

Hermetic compressor
Rotry compressor
Screw compressor
Scroll compressor
Centrifugal compressor

Thermal, Chemical and Physical properties of Refrigerant

I.                   Thermodynamics properties

·         Should have low boiling point

·         Should have  low freezing point

·         Should have a positive evaporator and condenser pressure

·          Should have high critical temperature and pressure

·         Should most have high latent heat of vaporization

·         Should have a low specific volume

II.               Chemical properties

·          Should have non flammable

·         Should have non toxic

·         Should have easily mix with oil

·         Should have low Solubility of water

·         Should have no effect of store products

III.            Physical properties

·         should have stable pressure and temperature

·         Should have low viscosity

·         Should have high thermal conductivity

·         Should have non corrosive

·         Should have die-electric to protect from short circuit

·         Should have high performance of system

·         Should have low cost

·         Should have low leakage tendency and easily detective