Designing of an intermittently operating solar powered aqua-ammonia absorption system requires determination of design parameters such as operating pressures, operating aqua-ammonia concentrations, energy requirement of all components of the system, etc. These design parameters are mainly dependent on four operating temperatures, namely, the condenser/day-ambient, the absorber/night-ambient, the evaporator/cooling-load, and the generator temperatures. The present study presents a set of new polynomial form of correlations for directly estimating these design parameters as a function of the four operating temperatures. The developed correlations are simple, easy to use and estimate the design parameters for both, constant pressure and constant temperature absorption intermittent systems with a percentage error of less than 3%.