Refrigeration and Air-Conditioning

 

 

What is Refrigeration?

It is the process in which heat is removed from body or space in such a way that first its temperature reduced and then maintained at a level below surrounding.

In this process heat is withdrawn from the desired space and rejected to the atmosphere which act as a natural receiver.

Insulated material is used to avoid heat flow from surrounding to enclosed space which is maintained at a lower temperature.

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Application

1.Manufacturing of ice.

2.Preservation of medicine.

3.For pre cooling and pasteurization of milk and in butter preparation.

4.cooling of cement concreate.

5.liquification of gases such as nitrogen, oxygen, hydrogen etc.

6.Preservation of fruits and vegetable, foods.



What is Air-Conditioning?

 

It is the process in which temperature, moisture, air quality is controlled for an enclosed space depending on the requirement.


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It has two type

1.Comfort AC

In this type different parameter of an enclosed space such as temperature, air quality, humidity is controlled in such a way that person feel comfortable.

 

2.Industrial AC

In this type space is maintained at a specific condition depends on the application.

Eg. 

In the server room a lot of heat is dissipated, so for the proper functioning of equipment low temperature and accurate humidity is maintained.

In the pharma industry, they need clean air with specific temperature and humidity

Difference of AC and Refrigeration

1. the apparatus supplies thermal energy from one place to a place of higher temperature whereas, in air conditioning, the thermal energy is taken from the air in order to cool the air.

2.In refrigeration only temperature is controlled for enclosed space and in air-conditioning, its temperature, humidity and quality if the air is controlled.



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