... ratio of stroke/boreϭ1.2. Using P-V and T-s diagrams, determine the properties of therefrigerant at each point in the cycle, and find: (a) Weight of ammonia circulatedper minute; (b) ihp of compressor ... procedure is the work of Norman R. Sparks, Professor and Head, Depart-ment of Mechanical Engineering, The Pennsylvania State University, and CharlesC. DiLio, Associate Professor of Mechanical Engineering, ... procedure is the work of Norman R. Sparks, Professor and Head, Depart-ment of Mechanical Engineering, The Pennsylvania State University, and CharlesC. DiLio, Associate Professor of Mechanical Engineering,...