Results 31 to 40 of about 142 (118)
Alternative method for assessing the effectiveness of heat exchangers
Measurement: Sensors, 2021 This article discusses an automated system for monitoring the thermal effectiveness of hydrogenerator heat exchangers (water-air). The proposed calculation methodology eliminates the need to measure the outlet air temperature (the heat exchanger hot ...
Mauricio N. Frota, PhD +3 more
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Energies, 2021 From the breakdown of the Kaplan rotor of a hydrogenerator unit and the monitored data collected during its operation before such a failure, this work presents a post-occurrence data analysis in which a previously developed hybrid method based on ...
Miguel A. C. Michalski +4 more
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The Methods of Three-Dimensional Modeling of the Hydrogenerator Thrust Bearing
Computation, 2022 In the presented scientific work, the basic design versions of the thrust bearings of Hydrogenerators are considered. The main causes of emergencies in the thrust bearing unit of a high-power Hydrogenerator are considered.
Oleksii Tretiak +4 more
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Research in Agricultural Engineering, 2005 The developed loading device with opened hydrostatic circuit for measurement of speed and dynamic characteristics of the tractor engine by power take off is presented. This loading device may also be used as a portable type for field measurement.
Š. Drabant +4 more
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IEEE Access, 2020 Hydrogenerators are strategic assets for power utilities. Their reliability and availability can lead to significant benefits. For decades, monitoring and diagnosis of hydrogenerators have been at the core of maintenance strategies. A significant part of
Ryad Zemouri +5 more
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Measuring Transducer for Air Gap Capacitive Sensor in Hydrogenerator
Приборы и методы измерений, 2020 One of the most important parameters of powerful hydro generators (HG) is the air gap between the rotor and the stator, and its deviation from the set norms is a defect that can lead to serious accidents.
A. S. Levytskyi +3 more
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Commissioning tests of the first hydro-generator of the Bajo de Mina HPP (Panama) [PDF]
E3S Web of Conferences, 2020 A mathematical model has been developed for calculating the distribution of azimuthal velocities and the shape of the free surface of oil in the compartments of an oil bath of a hydro-generator. The mathematical model of oil flow is verified by comparing
Zuikov Andrey
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The detection and localization of stator bar with electrical breakdown of insulation [PDF]
Zbornik Radova: Elektrotehnički Institut "Nikola Tesla", 2018 While in operation, the generators are exposed to various electrical, thermal, mechanical and chemical stresses, but also to pollutants that shorten their lifetime.
Klasnić Ilija +2 more
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The Journal of Engineering, 2019 The study of stator core vibrations generated by electromagnetic forces in electrical machines is of great practical and theoretical interest. An important part of the problem is the correct determination of mode shapes and eigen frequencies of the ...
Allan de Barros +9 more
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Journal of Hebei University of Science and Technology, 2021 In order to avoid the fault caused by over high temperature of the stator and ensure the normal performance of the hydro-generator,a temperature field distribution model of the hydro-generator was established,and a temperature prediction method was ...
Yong1 LI +4 more
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