I woul like to know about refrigeration & air conditioning?

Question

I woul like to know about refrigeration & air conditioning?

Answer 1

The working principle of air conditioning and Refrigeration is same but the application is totally different .

Air conditioning refers to conditioning the air we breath in accordance to our need or comfortability ...ie cool in summer and hot in winter

where as Refrigeration refers to keeping things cold for longer periods to maintain their aroma and taste as in case of canned foods ... fisheries ,exported meat. etc ....

Answer 2

Refrigeration keeps things cold, air conditioning keep people cool.  If you are more specific, you might get a more specific answer.

Answer 3

Refrigeration and air conditioning use the same cooling device like compresser,except an air conditioner uses a more powerful circulation fan to exchange the air from hot into cold faster in a large area.

Refrigeration: temperature from -10 C  to 10 C,able to keep most food,meat etc. last longer. Usually it is made of heat insulate material in a small area.

Airconditioning: temperature from 20 C to 26 C,this is a comfortable zone for human being. It also reduces the moisture in the air and keep in a range of 50%.

Answer 4

The Vapour Compression Refrigeration Cycle.

(Thermo-dynamic Cycle).

The principles used in a vapour compression refrigeration system are: -

A...Compression of a gas causes its temperature to increase.   When the gas is cooled and sensible and latent heat removed, the temperature decreases and the gas condenses to liquid which is also the boiling point of the liquid.  (The compression also increases the temperature at which the liquid boils). The liquid is then further cooled to around atmospheric temperature.    

B...When the liquid is expanded (volume increased) into a lower pressure system, it will boil and cause the liquid temperature to decrease rapidly as it gives up sensible heat to provide the latent heat of partial vaporization of the liquid.    The cold liquid and vapour, (the latent heat does not increase the vapour temperature), now pass through the coils inside the ' Cold Box ' (or Evaporator) of the system.    

Exchange of heat between the refrigerant and the material or space being cooled, adds more heat to the refrigerant liquid which continues to evaporate.   The refrigerant, on leaving the cooling system is now all cool vapour and passes to the suction of the compressor to begin the cycle again.



The sequence of the Thermo-dynamic refrigeration cycle is as follows: -

1...Compression of the gas.

2...Cooling and condensation of the refrigerant to liquid.

3...Expansion and partial evaporation of the liquid into a lower pressure which causes cooling.

4...Continued evaporation of the liquid in the 'cold box' - further heating by removal of sensible heat from the item being cooled, to provide the latent heat of vaporization of the refrigerant.

5...Re-compression of the vapour to begin the cycle again.

There's much more to the process than this, including notes on the A/C unit which uses the same cooling process but, it will be too long to write-up here. Diagrams are also required to fortify the text.

(A picture is worth a Thousand Words).