Results 11 to 20 of about 23,975 (171)

Computational fluid-dynamic analysis of an automated floodgate for capacity gains in hydroelectric powerplants [PDF]

RBRH
Brazil has an elevated dependence on hydroelectric powerplants, both in terms of production of renewable energy as well as providing stability to the energy grid while using intermittent energy sources.
Antônio Carlos Barkett Botan, Oswaldo Honorato de Souza Junior, Geraldo Lúcio Tiago Filho, Ivan Felipe Silva dos Santos   +3 more
doaj   +3 more sources

When There's No November Rain: Developing a Parametric Insurance for Hydroelectric Energy Generators in Brazil. [PDF]

Risk Anal
ABSTRACT Hydrological risk is a growing challenge for renewable power systems, as droughts reduce generation, increase costs, and expose gaps in risk‐transfer mechanisms. We examine this problem in Brazil, home to the world's sixth‐largest electricity system and highly dependent on hydroelectricity, which accounted for 43% of installed generation ...
Fonseca NC, Carvalho JVF, Araújo TD, Chagas ALS.   +3 more
europepmc   +2 more sources

Extent, characteristics and policy applications of Key Biodiversity Areas. [PDF]

Biol Rev Camb Philos Soc
ABSTRACT A global standard for the identification of Key Biodiversity Areas (KBAs) was published 10 years ago to provide a unified set of criteria for identifying ‘sites of significance for the global persistence of biodiversity’. We review the initiative's origins, the KBA identification process, characteristics of the current network, threats, policy
Butchart SHM, Crowe O, Scott T, Plumptre AJ, Eldred M, McKee E, Waliczky Z, Hasani IA, Azpiroz AB, Baisero D, Barasa F, Beresford AE, Bezeng BS, Boyd C, Brooks TM, Buchanan G, Bunting G, Capellan S, Cox N, Davenport TRB, Davies TE, Togna GD, Elliott W, Foster M, Gilbert J, Handley JM, Juffe-Bignoli D, Jones VR, Kingston N, Kivono J, Lamoreux J, Langhammer PF, Lewis J, Liggitt B, Marnewick D, Matiku P, McCreless E, Neugarten RA, Numa C, O'Brien M, Rao M, Raudsepp-Hearne C, Ray JC, Rijal S, Rodríguez JP, Sapijanskas J, Sechrest W, Sneary M, Snyder A, Spiliopoulou K, Starnes T, Tobar C, Surya G, Tognelli MF, Tordoff AW, Toscano MG, Trisurat Y, Upgren A.   +57 more
europepmc   +2 more sources

Metallographic Aspects Investigation of Penstock Materials in Hydroelectric Power Plants and Penstock Maintenance Methods

Sakarya Üniversitesi Fen Bilimleri Enstitüsü Dergisi, 2019
Hydroelectric powerplants are renewable energy sources and have little impact on the environment.Therefore, it is one of the most preferred energy sources in the world.
Gökhan Kahraman, Yahya Taşgın
doaj   +1 more source

Performance evaluation of MQL with AL2O3 mixed nanofluids prepared at different concentrations in milling of Hastelloy C276 alloy

Journal of Materials Research and Technology, 2020
Since some deficiencies in mist lubri-cooling techniques i.e., minimum quantity lubrication (MQL) in heavy cutting conditions have been noticed, recently nano-cutting fluids which have enrich thermal conductivity than base fluid, are begun to be used in ...
Fatih Günan, Turgay Kıvak, Çağrı Vakkas Yıldırım, Murat Sarıkaya   +3 more
doaj   +1 more source

Theoretical and experimental evaluation of the spark-ignition premixed oxy-fuel combustion concept for future CO2 captive powerplants [PDF]

, 2021
[EN] Oxy-fuel combustion concept is one of the most promising technologies not only to avoid NOx emissions, but also to reduce CO, unburned hydrocarbons and soot emissions in combustion-based powerplants.
Gómez-Soriano, Josep, Raggi, Rodrigo, Serrano, J.R., Martín, Jaime   +3 more
core   +1 more source

Evaluation of tool wear, surface roughness/topography and chip morphology when machining of Ni-based alloy 625 under MQL, cryogenic cooling and CryoMQL

Journal of Materials Research and Technology, 2020
Although nickel-based aerospace superalloys such as alloy 625 have superior properties including high-tensile and fatigue strength, corrosion resistance and good weldability, etc., its machinability is a difficult task which can be solved with ...
Çağrı Vakkas Yıldırım, Turgay Kıvak, Murat Sarıkaya, Şenol Şirin   +3 more
doaj   +1 more source

Observations on aquatic Macrophyte Dynamics In the Reservoir Of The Balbina Hydroelectric Powerplant, Amazonas State, Brazil [PDF]

Acta Amazonica, 1999
Between 1991 and 1995 aquatic macrophyte composition was observed in the lower part of the reservoir of the hydroelectric power plant of Balbina (Amazonas, Brazil).
Ilse WALKER, Roberto MIYAI, M. D. Amaral de MELO   +2 more
doaj   +1 more source

Intelligent System for Dispatch Ranking of Generating Units in Thermoelectric Power-Plants

Brazilian Archives of Biology and Technology, 2022
The multicriteria decision-making process is still an open problem, especially when the decision criteria are not numerical or fully outlined. Several numerical, intelligent, or hybrid techniques have been developed, creating contributions to this ...
Ricardo Barbosa de Almeida Campos, Frederico de Oliveira Assunção, Elvis Ricardo de Oliveira, Luiz Eduardo Borges da Silva, Erik Leandro Bonaldi, Germano Lambert-Torres, Levy Ely de Lacerda de Olivieira, Herbert Antonio Marques da Costa, Vinicius Martins Gontijo, Rodrigo Oliveira Rosa Bizinotto   +9 more
doaj   +1 more source

DEVELOPMENT OF AUTOMATION OF PROTECTION OF THE HOME ELECTRICITY OF POWER-PLANTS [PDF]

Biomedicinskaâ Inženeriâ i Èlektronika, 2017
The main types and classification of safety fuses are considered. The advantages of a grid protection network against overload are highlighted. The methodology and the scheme of the home network protection automaton from overload are presented.
Novikova L.V. , Novikov O.O., Nikonova O.V.   +2 more
doaj   +1 more source