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A Shortcut to Optimize Pipe Diameters by Economic Criteria

By Srbislav Genic and Branislav Jac´imovic |

This methodology can be used not only for laminar flow, but also for the complete turbulent flow region In recent decades, the impact of energy costs on the transport of fluids has led to a significant reduction in fluid velocity and an increase in the diameter of the pipeline. In this article, an improved shortcut methodology is presented for estimating the optimal diameter of pipelines. Besides the laminar flow regime, the algorithm can be applied, for the first time, to the complete turbulent flow region. Several examples are presented that demonstrate the simplicity of the method and illustrate the impact of changes in economic parameters on the optimal diameter of pipelines. Moreover, a sensitivity analysis was done to show that the optimization model provides the solution in an acceptable range, especially for the conceptual phase of projects, as well as for basic design. Nomenclature  A Parameter, see Equation (14) a Amortization parmeter, $/yr) B Parameter, see Equation (15) b Maintenance costs, $/yr Cc Annual capital cost, $/yr Ce Annual operational cost of pipeline, $/(W·h) cen Cost of electric energy, $/(W·h) D Pipe inner diameter, m Dopt Optimal pipe inner diameter, m E Overall efficiency of pump, compressor…
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