Eventos Anais de eventos
ENCIT 2018
Brazilian Congress of Thermal Sciences and Engineering
STATISTICAL ANALYSIS OF THE ACCURACY OF EMPIRICAL LOSS OF LOAD EQUATION
Submission Author:
Jurandir Sousa , PA
Co-Authors:
Joanyson Pereira, Jurandir Sousa, Druscilla Zaghetti, Ronaldo Moura, Jessé Padilha
Presenter: Joanyson Pereira
doi://10.26678/ABCM.ENCIT2018.CIT18-0212
Abstract
In repression pipes, it is utmost importance to measure load losses, since these phenomena have a direct influence on the hydraulic system sizing, mainly in the distribution lines. Diverse researchers and technicians of the hydraulic area use diverse empirical equations proposed in related literatures, with the intention of quantifying these losses. However, to obtain a more accurate parameter estimate, suitable equipment is necessary, such as differential manometers. With this scenario in mind, four empirical equations were analyzed, which quantify and evaluate the load loss indexes. They are: Hazen-Williams's equation, Flamant, Fair-Whiplle-Hsião and Darcy-Weisbach. The results obtained were compared with the load loss values measured by a Bourdon type differential manometer. The tests were carried out by varying a flow, where for each condition analyzed, to obtain the data, which allow to compare and evaluate the results obtained in the respective equations in this work. From the obtained results, it is possible to infer that the empirical equations indicate higher load losses than those observed in differential manometers. Darcy-Weisbach's equation was more accurate, with an accuracy above 20.00%, whereas the methodology presented by Fair-Whiplle-Hsião diverged around 45.00% of the loss indicated in the manometers.
Keywords
Load Loss, Empiric Equations, Precision
