scholarly journals APPLICATION OF CALIBRATION CERTIFICATE OF DIGITAL LEVELING SYSTEMS IN THE MONITORING OF STRUCTURES: A CASE STUDY AT THE GOVERNADOR JOSÉ RICHA HYDROELECTRIC POWER PLANT - PR

2018 ◽  
Vol 24 (2) ◽  
pp. 235-249 ◽  
Author(s):  
Alyne Raminelli Siguel Gemin ◽  
Érica Santos Matos ◽  
Pedro Luís Faggion
Keyword(s):  
Power Plant ◽  
Hydroelectric Power Plant ◽  
Hydroelectric Power ◽  
Calibration System ◽  
First Order ◽  
The Past ◽  
Over Time ◽  
Equipment Performance

Abstract: The monitoring of the vertical behavior of benchmarks installed in the dam crest of the Governador José Richa hydroelectric power plant (UHGJR) has been performed by the first-order differential leveling method with the use of digital leveling systems which are composed of a digital level and a invar barcode rod. By default, the scales of these instruments are the same, but over time both can change, degrading the observations. In the past, the simultaneous calibration of these systems was not considered in the determination of UHGJR settlements, however, after the development of the first calibration system of digital leveling systems in Brazil, it was possible to investigate the equipment performance as well as to determine a scale factor to be applied to correct the level readings. The results achieved are the systems calibration used in the monitoring of the UHGJR and the calibration certificate application in leveled sections in November 2016. The maximum correction applied to the elevation differences was of the order of nine tenths of millimeters, result attributed to the region observed in the rod, since the deviations obtained in the calibration vary according to the reading position at the rod.

On-line cleaning technique for mitigation of biofouling in heat exchangers: A case study of a hydroelectric power plant in Brazil

2014 ◽  
Vol 53 ◽  
pp. 197-206 ◽  
Author(s):  
M.N. Frota ◽  
E.M. Ticona ◽  
A.V. Neves ◽  
R.P. Marques ◽  
S.L. Braga ◽  
...  
Keyword(s):  
Power Plant ◽  
Heat Exchangers ◽  
Hydroelectric Power Plant ◽  
Hydroelectric Power ◽  
On Line

scholarly journals Electromagnetic reflection survey 1986 at the Inland Ice margin of the Pâkitsoq basin, central West Greenland

1987 ◽  
Vol 135 ◽  
pp. 87-95
Author(s):  
L Thorning ◽  
E Hansen
Keyword(s):  
Power Plant ◽  
Hydroelectric Power Plant ◽  
Field Work ◽  
Ice Thickness ◽  
Data Sets ◽  
Hydroelectric Power ◽  
Subglacial Topography ◽  
Series Of Experiments ◽  
Inland Ice

The first successful application of electromagnetic ref1ection (EMR) techniques for determination of ice thickness in the outermost margin of the Inland Ice adjacent to the Pâkitsoq basin took place in luly 1985 (Thorning et al., 1986). Although the survey was planned as a series of experiments to examine why previous attempts had not worked, the EMR data acquired were of very good quality and could be compiled into a preliminary map of ice thickness and a map of the subglacial topography over part of the region. Thus, by early 1986 it Rapp. Grønlands geol. Unders. 135, 87-95 (1987) was known that the method worked and could be compiled through to the final product. With the increasing interest in this region, which is the planned location of the first hydroelectric power plant in Greenland, it was necessary to return in 1986 to survey the area in greater detail and to extend the coverage to the east. This note describes the field work carried out in April 1986 and the subsequent compilation and analysis of the combined EMR data sets from 1985 and 1986.

scholarly journals A Data-Driven Approach to Extend Failure Analysis: A Framework Development and a Case Study on a Hydroelectric Power Plant

Energies ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 6400
Author(s):  
Sara Antomarioni ◽  
Marjorie Maria Bellinello ◽  
Maurizio Bevilacqua ◽  
Filippo Emanuele Ciarapica ◽  
Renan Favarão da Silva ◽  
...  
Keyword(s):  
Power Plant ◽  
Failure Analysis ◽  
Power Plants ◽  
Failure Modes ◽  
Real Life ◽  
Hydroelectric Power Plant ◽  
Data Driven ◽  
Hydroelectric Power ◽  
Data Driven Approach

Power plants are required to supply the electric demand efficiently, and appropriate failure analysis is necessary for ensuring their reliability. This paper proposes a framework to extend the failure analysis: indeed, the outcomes traditionally carried out through techniques such as the Failure Mode and Effects Analysis (FMEA) are elaborated through data-driven methods. In detail, the Association Rule Mining (ARM) is applied in order to define the relationships among failure modes and related characteristics that are likely to occur concurrently. The Social Network Analysis (SNA) is then used to represent and analyze these relationships. The main novelty of this work is represented by support in the maintenance management process based not only on the traditional failure analysis but also on a data-driven approach. Moreover, the visual representation of the results provides valuable support in terms of comprehension of the context to implement appropriate actions. The proposed approach is applied to the case study of a hydroelectric power plant, using real-life data.

EXPERIMENTAL DETERMINATION OF THE DISCHARGE COEFFICIENT OF A FLOODGATE AND THE SURFACE ROUGHNESS SCALE IN A PHYSICAL MODEL OF A SMALL HYDROELECTRIC POWER PLANT

2020 ◽  
Author(s):  
Hélio Augusto Goulart Diniz ◽  
Lúcio Sant'Anna Purri Miranda ◽  
Gleberson Marques Humia ◽  
MATHEUS PHILIP MENEZES ROCHA ◽  
Henrique Mendes Sampaio ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Power Plant ◽  
Experimental Determination ◽  
Physical Model ◽  
Discharge Coefficient ◽  
Hydroelectric Power Plant ◽  
Hydroelectric Power

Determination of crushed stone volume in concrete cores from hydroelectric power plant dams by three-dimensional tomography

2009 ◽  
Vol 51 (12) ◽  
pp. 654-659 ◽  
Author(s):  
R Mendes ◽  
K F Portella ◽  
W C Godoi ◽  
J C A Galvão ◽  
A Joukoski ◽  
...  
Keyword(s):  
Power Plant ◽  
Three Dimensional ◽  
Hydroelectric Power Plant ◽  
Crushed Stone ◽  
Hydroelectric Power
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