Optimal Design of Pressurized Irrigation Subunit
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VIEW THE REPLYPublication: Journal of Irrigation and Drainage Engineering
Volume 134, Issue 2
Abstract
A linear programming (LP) model is presented for optimal design of the pressurized irrigation system subunit. The objective function of the LP is to minimize the equivalent annual fixed cost of pipe network of the irrigation system and its annual operating energy cost. The hydraulic characteristics in the irrigation subunit are ensured by using the length, energy conservation, and pressure head constraints. The input data are the system layout, segment-wise cost and hydraulic gradients in all the alternative pipe diameters, and energy cost per unit head of pumping water through the pipeline network. The output data are: segment-wise lengths of different diameters, operating inlet pressure head, and equivalent annual cost of the pipeline network. The explicit optimal design is demonstrated with design examples on lateral and submain or manifold of pressurized irrigation systems. The effect of the equations for friction head loss calculation on optimization procedure is investigated through the design example for microirrigation manifold. The performance evaluation of the proposed model in comparison with the analytical methods, graphical methods, numerical solutions, and dynamic programming optimization model reveals the good performance of the proposed model. The verification of operating inlet pressure head obtained by the proposed model with accurate numerical step-by-step method suggested that it is mostly accurate.
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Acknowledgments
The first writer wishes to express his sincere thanks to AICTE, New Delhi, for providing fellowship during his M.Tech. degree program and to carry out this research work as a part of dissertation for the partial fulfillment of Master’s degree at Govind Ballabh Pant University of Agriculture and Technology, Pantnagar, India. The first writer also wants to thank Mr. B. Sahoo, Research Scholar, Department of Hydrology, IIT Roorkee, for his help received during the preparation of this manuscript.
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Information & Authors
Information
Published In
Journal of Irrigation and Drainage Engineering
Volume 134 • Issue 2 • April 2008
Pages: 137 - 146
Copyright
© 2008 ASCE.
History
Received: Dec 8, 2006
Accepted: May 22, 2007
Published online: Apr 1, 2008
Published in print: Apr 2008
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