A comparative study of modern transient pipe-line techniques using ammonia as fluid medium



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This thesis presents a comparative study of transient pipeline techniques using ammonia as a fluid medium. Physical properties and characteristics of the use of liquid ammonia in pipelines is first given, and then two basic methods of determining surge pressures are presented. Friction effect is very important in waterhammer analysis, especially in long pipelines where the frictional resistance is large in comparison to the surge pressure. Initially, solutions for short and long pipelines are analyzed using the graphical waterhammer method. Next, a method introduced by Ludwig & Johnson is used for the same short and long pipelines for comparison. This method may be used since conditions in normal pipeline surge problems allows the use of certain acceptable assumptions. Calculations and charts are included in this thesis to make it more useful and acceptable.