Vapour Absorption Refrigeration System

Vapour Absorption Refrigeration System

Saswata Baksi Refrigeration and Air-Conditioning Leave a Comment

A Vapour Absorption Refrigeration System consists of these following parts:

  • Generator
  • Condenser
  • Receiver
  • Expansion Valve
  • Evaporator
  • Absorber
  • Pump
  • Throttle Valve

In Vapour Absorption Refrigerant System the low-pressure refrigerant vapor (NH3) from the evaporator is absorbed in the absorber by a weak solution of refrigerant and lowers the pressure in the absorber to draw more NH3 vapor from the evaporator. The cooling system also used to remove the heat of solution to increase the absorption capacity.

The pumps draw strong solution (rich in refrigerant) from the absorber, builds pressure and forces in the generator. the strong solution of NH3 in the generator is heated by a gas or steam to drives out the NH3 in the generator is heated by a gas or steam to drives out the NH3 vapor to the condenser and weak solution returns to the absorber.

After condensing in the condenser, the liquid NH3 with high pressure is passed through a throttle valve to the evaporator where it absorbs its latent heat thus producing cold.

VAPOUR ABSORPTION REFRIGERATION SYSTEM FLOW DIAGRAM
VAPOUR ABSORPTION REFRIGERATION SYSTEM

Actual Vapour Absorption Refrigeration System

In actual vapour absorption refrigeration system when heat-exchanger and rectifier are used with a simple system to improve operating efficiency than it is called Practical Vapor Absorption System.

The low-pressure refrigerant vapor (NH3) from the evaporator is absorbed in the absorber by the weak solution of refrigerant. The pump draws the strong solution of NH3, build high pressure and forces to the generator through a heat exchanger where weak solution acts as cooling media. Therefore reduce the cost of heating in the generator and cost of cooling the absorber.

The analyzer is a direct contact heat exchanger consisting of a series of trays mounted above the generator which remove some unwanted water particles associated with NH3 vapor going to the condenser.

The refrigerant from the analyzer enters the rectifier where the final reduction of water vapor occurs by cooling water circulation.

The liquid refrigerant from the condenser expands in the expansion valve and enter the evaporator cooling.

PRACTICAL VAPOUR ABSORPTION REFRIGERATION CYCLE FLOW DIAGRAM
PRACTICAL VAPOUR ABSORPTION REFRIGERATION CYCLE FLOW DIAGRAM

Here are some reference videos for you

APOUR ABSORPTION CYCLE 1 BY PROF. RAVI KUMAR, IIT ROOKIE Source: NPTEL
APOUR ABSORPTION CYCLE 2 BY PROF. RAVI KUMAR, IIT ROOKIE Source: NPTEL
APOUR ABSORPTION CYCLE 3 BY PROF. RAVI KUMAR, IIT ROOKIE Source: NPTEL

You can also Check-out Vapour Compression Refrigeration System and Electrolux refrigeration System written by me.

Conclusion

Now I love to hear from you, In this guide of VCC, I showed all-important point regarding VCC. And also I shared a couple of videos of Prof. Ravi Kumar. I am pretty sure you have already clear your doubts although If you wanna need some specific question regarding this please comment down below, I would reply to all of your queries.

STILL HAVE QUESTIONS ON YOUR MIND?

ASK-YOUR-DOUBT

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About the Author

Saswata Baksi

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Saswata completed his diploma in Mechanical Engineering from I.C.V.P and now studying B-Tech in the School of Mechanical Engineering at KIIT University, one of the best universities in India. Apart from that, he loves blogging, Saswata is also the founder of jhargramhub.in and partsofspeech.net

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