Navegando por Autor "SILVA, Victor Renan Barbosa da"

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Análise do aproveitamento energético em redes de distribuição de água com a utilização de bombas como turbina (BFT)
(Companhia de Saneamento Básico de São Paulo, 2023-09) SILVA, Victor Renan Barbosa da; ISHIHARA, Júnior Hiroyuki; VIANA, Ingrid Luna Baia; SOUSA, Juliana Melo de Sousa; SOUZA, Davi Edson Sales e
Water distribution networks (WDNs) need adequate pressure to deliver water to users. In some cases, the pressure is excessive and is usually dissipated by pressure reducing valves (PRVs), which end up wasting this energy contained in the network. Due to the worldwide need to seek renewable energy generation technologies, researchers have studied the possibility of replacing these PRVs with a pump running as turbines (PAT). It is a centrifugal pump operating inversely in substitution of PRVs. As WDNs operate under varying conditions of flow and pressure, the prediction of PATs still encounters difficulties, which impairs their effective control of pressure when replacing PRVs. This work analyzes a real network with pressure management problems. Different locations of PRVs to control network pressure were proposed in two hydraulic simulations. The PRVs were replaced by PATs and it was evaluated to see which was the best configuration for greater control of supply pressure. The prediction of these machines was performed by a joint method that analyzes the entire operating range. In addition, the amount of energy recovered and the environmental benefits were estimated. The results show the pressure control in the two simulations (S1 and S2), in S1, the pressure in the most critical node was reduced in 42.80% and the energy recovery was 52 kWh/day. In S2, the pressure was reduced in 45.21% and the energy recovery was 190.96 kWh/day; in addition to better controlling the pressure, the energy recovery results were 267% higher than S1. The joint method, proposed in the research, simplified the PAT selection and prediction process, and it was possible to conclude that these machines should be installed in parallel with the PRVs, considering that, when the PATs cannot adjust the pressure at some times of the day, the valves do.
Acesso aberto (Open Access)
Análise do aproveitamento energético em redes de distribuição de água com a utilização de bombas como turbina (BFT)
(Universidade Federal do Pará, 2022-03-31) SILVA, Victor Renan Barbosa da; ISHIHARA, Júnior Hiroyuki; http://lattes.cnpq.br/3498874642887006; https://orcid.org/0000-0002-0081-7913
Climate change has intensified research related to the production of renewable energies around the world. In this sense, the present study intends to contribute to the analysis of the use of Pumps Functioning as Turbine (PAT) to replace Pressure Reducing Valves (PRV), aiming both at the control of pressure in water distribution networks, as well as , consequently, its use for energy generation. The installed PAT must be able to operate under different flow rates due to fluctuations in the water consumption rate, which makes it difficult to select the appropriate pump, therefore, the selection process of PATs to replace PRVs was optimized by combining two selection methods and PAT prediction, Williams (1995) the first method was used to select the appropriate PAT according to height and flow data available in the network, then the method of Rossi et al. (2019) was used to evaluate the characteristic curves of the pump as a turbine, with particular attention to out-of-design operating conditions. Two simulations were performed for the optimization process, considering the PAT with constant speed, applied to a real network that was divided into 3 district measurement areas (DMA). In the first simulation a PAT was added to the network to replace a PRV located at (DMA 3), in the second simulation two PATs were added to the network (DMA 3) to replace the PRVs. The results show, in simulation 2, that the pressure control was better, in addition to the recovery of electrical energy, which was 190.96 kWh/day or 69.70 MWh/year, corresponding to a reduction of 41.74 tons of CO2 not emitted. Thus, the energy recovery was 267% higher compared to simulation 1. In addition, the pressure control also presented satisfactory results, staying within the established standards. Therefore, the combination of Williams' (1995) and Rossi et al. (2019), simplified the work of BFT selection and prediction with significant results and it was possible to conclude that BFTs working at peak consumption hours can adjust the required standard pressure and, in the rest, PRVs can regulate the pressure. In this case, in addition to controlling the pressure continuously, significant renewable energy can be recovered from the WDN