The thermally activated refrigeration cycles receiving the most attention are dual pressure cycles requiring an electric pump to move the liquid solution from low pressure to high pressure. It accomplishes this by using a triple mixture of butane, ammonia, and water. Butane acts as the refrigerant, and ammonia acts as an inert gas creating low partial pressure for the butane in the evaporator to provide low temperature refrigeration.
Water serves as the absorbent to separate the ammonia from the butane.
A literature search has provided only two brief references to this unique cycle. This study provided insight on the processes of the cycle and its operating characteristics. It is proposed to further analyze the cycle and carry out design studies to improve its performance. The previous model will be improved by taking a more realistic fluid mixture property model, finite size heat exchangers, and including the bubble pump effects. In addition, other fluid triplets will be investigated.