Thermal Performance Predictions and Sensitivity Analysis for a Parallel Flow Solar Regenerator

One of the efficient methods of regenerating the weak absorbent solution using solar energy is the forced flow regeneration system. This paper describes a forced flow solar regenerator in which the absorbent solution to be concentrated flows as a thin film over the absorber and the water evaporating from the solution due to absorption of solar energy is removed by forced air stream, which flow parallel to the liquid film. A theoretical model, which includes the variation of rate of evaporation of water along the flow length of the regenerator, has been used to examine the thermal performance of the regenerator. Changes in thermal performance are reported in terms of the ratio of solution flow rate to air flow rate and the amount of water evaporated from the absorbent solution.