A novel type of LiBr /water absorption refrigeration cycle with the self-adjustable effect between 0. 5 and 1. 0( 0. n) have been proposed and analyzed. A pair of medium pressure evaporator / absorber is added into the single effect cycle to form this novel cycle. Cooling water into the cycle is precooled by this evaporator. Precooling makes the solution concentration out of the absorber weaker,which lifts the highest generation temperature limited by crystallization and drops the generation starting temper...