Absorber in ammonia-water absorption cycle is one of the most critical components from the viewpoint of size compactness, cost reduction, and performance improvement. The objectives of this study are to visualize the bubble shape and to analyze a combined heat and mass transfer for bubble absorption process. This experimental study was performed on a small bubble of ammonia absorption. Ammonia was provided through a single nozzle (2.0mm) into ammonia aqueous solution under system pressures of 0.1 MPa. Concentration of the solution was 0.2 kg/kg and temperature was at 298 K. Visualized date of bubble absorption shows bubble diameter and ascent speed.
