Tests Regarding the Transitory Regimes of Putting off Load of the Hydroagregate
Journal Title: Analele Universitatii "Eftimie Murgu" Resita. Fascicula de Inginerie - Year 2015, Vol 22, Issue 2
Abstract
For high power and high revolution aggregates it is required that the operation should take place in safe conditions, for all the running regimes. The most difficult regimes for a hydro aggregate are the transitory regimes. Although, these regimes generally last a rather short period of time, for high power aggregates these regimes are accompanied by electric and mechanic solicitations which sometimes can surpass the admitted values. In the present paper, we present an evaluation method of the rotating parts’ dynamic stability of the hydro aggregates in the transitory regime of putting off load. We present the results obtained from the recordings of putting off load and those obtained after the dynamic equilibration of the hydro aggregate’s rotor.
Authors and Affiliations
Marcel Romulus Jurcu, Ioan Pădureanu, Laurentiu Padeanu, Ladislau Augustinov, Cornel Hațiegan
Power System Health Monitoring Based on Energy Losses using Genetic Algorithm
System health assessment becomes ever more important as consumers take for granted the apparent infallible character of power supply and the extremely high costs of prolonged down times. A system that achieves minimum op...
Modernization of the Grinding Electromechanical Drive System of the Automated Coffee Machine
The paper refers to espresso coffee machines high quality and some possibilities to increase the level of automation and productivity. Existing machines require manual adjustment of coffee grinder depending on the qualit...
Motion without Friction of a Particle on a Mobile Surface with Bilateral Constraints
In this paper we present the equations of motion of a particle in a multi-body type form on a mobile surface. The particle is considered to be acted by a resultant force. At this resultant, the normal reaction is also ad...
Sensitivity Modeling and Evaluation of Evapo-transpiration Effects on Flow Discharge of River Owena in Nigeria
Analysis of discharges, precipitation and temperature and some other meteorological-hydrological variables from 1996-2011 at the section of Owena River Basin. The evaluation, correlations, and the relationship between pr...
Localized Modes at Defects in Sonic Composites
The paper discusses a sonic composite with a linear defect. Such structures allow localization of modes in the vicinity of the line defect with propagation along this line. The material in the vicinity of the line behave...