The absorption of the vapour is governed by Raoult’s law. The absorption cycle achieves this objective by placing the refrigerant in solution before the so called compression process and by removing from the solution immediately after the process. This may possibly be done by dissolving the refrigerant in some absorbent and supplying the heat to the solution for compression purposes. If means were available for rising this pressure of the refrigerant without appreciably altering its volume, the work requirements will be enormously reduced (by about 95% or so). Accordingly the major part of the power was consumed in the process. It may be recalled that in the compression system the vapour was compressed by undergoing a great change in volume during the compression process. Of course, it may be preferable to utilize heat as such as it avoids undergoing through the various energy transformations required in the generation of electrical energy from heat energy. In absorption refrigeration system, however, heat is directly utilized as source of energy. The power utilized in vapour compression system is high grade energy i.e., electric power for running the compressor motor. Vapour Absorption Refrigeration System (with diagram)!
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