27-08-2014, 03:53 PM
Vapour absorption refrigeration system is an attractive method for utilization low grade energy directly for cooling. This is an important advantage as against the conventional vapour compression refrigeration system which operates on high grade energy. Another important feature of this system is that it does not use any moving component except a very small liquid pump. Vapour absorption refrigeration system comprises of four basic components viz, an evaporator, an absorber, a generator and a condenser. A refrigerant flows from the condenser to the evaporator, then via absorber to the generator and back to condenser, and while the absorbent passes from the absorber to the generator back to the absorber. For maximum efficiency, the pressure difference between the low pressure side and the high pressure side is maintained as small as possible. Although the initial cost of these system is presently higher but there operating cost are often low, which can further reduced if efficient absorption and distillation can be achieved. Since the efficiency of these processes is determi