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Comparison of equations for the estimation of head loss in polyethylene tube
(Univ Estadual Centro-oeste, 2018-01-01)
The determination of the head loss in irrigation projects is not used because it is a low practical method. For this, there are equations that estimate this variable, based on characteristics of the pipes material, diameter ...
GEOMETRIC INDEX AND LOCAL HEAD LOSS IN CONNECTION OF ONLINE EMITTERS
(Soc Brasil Engenharia Agricola, 2014-11-01)
The objective of this research is to present a study on a relationship between the local head loss in connection of emitters in pipes with different diameters used in drip irrigation, with the online geometry of the emitter ...
Friction factor for small diameter polyethylene pipes
(UNIV ESTADUAL MARINGA, PRO-REITORIA PESQUISA POS-GRADUACAO, 2008)
On this paper, the results of an experimental study oil the hydraulic friction loss for small-diameter polyethylene pipes are reported. The experiment was carried out using a range of Reynolds number between 6000 to 72000, ...
Improving the mathematical formulation for the detailed scheduling of refined products pipelines by accounting for flow rate dependent pumping costs
(Nara Medianeira Stefano, 2013-10)
This work presents a continuous-time mixed-integer linear programming (MILP) formulation to find the best detailed schedule for single-source multi-product pipelines, minimizing the total operating costs. By knowing the ...
THE PERFORMANCE OF EXPLICIT FORMULAS FOR DETERMINING THE DARCY-WEISBACH FRICTION FACTOR
(Soc Brasil Engenharia Agricola, 2020-03-01)
The Darcy-Weisbach equation is the most recommended equation for determining the pressure loss in pressurized pipes because of its wide applicability. However, one of the largest obstacles to implementing this equation is ...
MINLP model for the detailed scheduling of refined products pipelines with flow rate dependent pumping costs
(Elsevier, 2014-01)
Multiproduct pipelines transport fuels from refineries to distant distribution terminals in batches. Theenergy needed to move the fluids through the pipeline is mainly associated with elevation gradients andfriction head ...
Índice geométrico e perda de carga localizada em conexões de emissores online
(2014-01-01)
The objective of this research is to present a study on a relationship between the local head loss in connection of emitters in pipes with different diameters used in drip irrigation, with the online geometry of the emitter ...
Friction loss correction in flowing well discharge tests
(AMER GEOPHYSICAL UNION, 2008)
Artesian confined aquifers do not need pumping energy, and water from the aquifer flows naturally at the wellhead. This study proposes correcting the method for analyzing flowing well tests presented by Jacob and Lohman ...
Analise da Rugosidade Superficial de Tubos Manufaturados por Impressão 3D
(Universidade Federal do Rio Grande do NorteBrasilUFRNEngenharia Mecânica, 2019-11-26)
The fast development of prototyping technologies allowed the optimization of engineering projects in several
areas. On this paper was used methods to achieve an absolute value for the average superficial roughness parameter ...