Banca de DEFESA: Laura Aurora de Melo Santana

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : Laura Aurora de Melo Santana
DATE: 28/06/2024
TIME: 14:00
LOCAL: Sala de Informática do PTARH com Transmissão pela Plataforma MS Teams
TITLE:

OPTIMAL DESIGN OF HYDRAULIC TRANSIENT PROTECTION DEVICES IN WATER PUMPING SYSTEMS

KEY WORDS:

Hydraulic transient; Optimization; Protection device; Water pumping system.

PAGES: 110
BIG AREA: Engenharias
AREA: Engenharia Sanitária
SUBÁREA: Recursos Hídricos
SUMMARY:

A hydraulic transient occurs when flow conditions are altered due to variations in the pipeline, and it may result in issues within the system such as pipe rupture or its collapse. One way to support hydraulic systems and ensure their safety is by using protection devices. Therefore, it is important to consider their appropriate design, considering both protection and costs, as these devices directly impact the system's overall value. This study aims to develop a computational routine for optimizing the selection of protection devices using multi-objective genetic algorithms and to build a hydraulic simulator with different protection devices against transient regimes generated by pump shutdowns. The hydraulic simulator was coupled with an optimization method (multi-objective genetic algorithm) to size the devices considering more than one objective function in the search. The models were applied to the Mestre D'Armas Water Pumping System in Brasília-DF. The Method of Characteristics was used for hydraulic simulation under different boundary conditions. For optimization, two genetic algorithms were employed: NSGA-II and NSGA-III. Additionally, two scenarios and two and four objective functions were considered. The results demonstrated that both optimization algorithms effectively sought optimal solutions that sufficiently met the requirements of water pipelines under hydraulic transients. However, the NSGA III algorithm provided more suitable solutions for the analyses in this study. Furthermore, the minimum pressure is the most influential parameter in the simulations. The air chamber was the main equipment in protecting the system against pressure rise and pressure drop. The air valve and the surge tank satisfactorily complement the air chamber in addressing pressure drop, demonstrating comparable performance levels within this system. Moreover, suppose the watertightness and proper functioning of the water main are guaranteed. In that case, slightly negative pressures will not affect the performance and safety of the system and it will significantly reduce the volume of the air chamber. Consequently, it will provide less costly solutions. The real-life system is equipped with devices that provide adequate protection.

COMMITTEE MEMBERS:
Presidente - 1646016 - ALEXANDRE KEPLER SOARES
Interno - 2764698 - CARLOS HENRIQUE RIBEIRO LIMA
Interno - 1809020 - DIRCEU SILVEIRA REIS JUNIOR
Externo à Instituição - MARCO AURELIO HOLANDA DE CASTRO - UFC