Advantages and Disadvantages of Vapour Absorption Refrigeration Cycle

1. Strong solution of ammonia is formed in the absorber, dissolving fairly dry Ammonia Vapour in cold water.

The weak solution containing very little ammonia in sprayed is absorber, absorbs ammonia from the evaporator, lower the pressure in absorber & as a result more ammonia Vapour is drawn from the evaporator.

2. Pump.

3. Heat exchanger.

4. Heater/generator.

5. Oil separator.

6. Ammonia gas expelled from the strong solution in the generator & passes on the condenser.

7. Throttle Valve lowers the pressure.

8. Evaporator absorbs heat.

Advantages of vapour absorption cycle:

(i) Moving part is pump

(ii) Reduced vaporization pressure & temperature

(iii) Load variation does not affect performance

(iv) Capacity > 1000 T, 30TR 91% electricity saves.

Disadvantages of vapour absorption cycle:

(a) Efficiency is low

(b) Takes long time to produce cooling effect

(c) Kerosene/oil/gas flame gives bad smell.