Eventos Anais de eventos
ENCIT 2022
19th Brazilian Congress of Thermal Sciences and Engineering
Spillway operation effects on the feasibility of a hybrid solar pumped storage system for supplying energy to a lock
Submission Author:
Gilton Furtado , PA
Co-Authors:
Gilton Furtado, André Luiz Amarante Mesquita
Presenter: Gilton Furtado
doi://10.26678/ABCM.ENCIT2022.CIT22-0346
Abstract
Hybrid systems have been proposed around the world as alternatives to solve energy questions. The increasing insertion of renewable sources, especially photovoltaic, in the generation matrices due to the advantages such as solar availability, continuous reduction of investment costs and increasingly attractive return on investment, also brings restrictions of use, such as the issue of variability and storage to ensure energy delivery with the desirable characteristics. The objective of this work is to demonstrate, in a hybrid system proposed to meet the energy demand of a lock, its feasibility by associating solar source with pumped storage, in addition to the reduction in payback caused by the presence of the adjacent spillway with which the system shares the same upper reservoir. The system, solar with pumped storage and hydraulic generation through PATs, is designed to operate in accordance with the rules of the Brazilian electricity sector, providing for operation as pump and turbine at the lowest and highest tariff times, respectively, besides optimizing operating time, installed power, energy cost and volume of water used, in addition to payback. The main result highlighted is related to the advantages of the use of pumps and PATs associated with the photovoltaic source in the absorption of oscillations, in financial terms, considering the period of up to five months of opening of the spillway, in which for the system, there is no need of storage there is a reduction in the capital cost of the project, favoring the consequent reduction in the payback from 3.7 years to approximately 2.3 years, which makes the system even more attractive and demonstrating its feasibility. The analysis of the spillway influence in a project applied in locks can be an interesting approach to assist in the decision making regarding the adoption of a renewable energy project, in view of the important implications for the company that operates the installation.
Keywords
Renewable hybrid system, pumped storage, Pump as turbine, Payback, spillway
