scholarly journals Perfis verticais dos espectros das velocidades turbulentas em uma torre micrometeorológica de 140 m

2018 ◽  
Vol 40 ◽  
pp. 229
Author(s):  
Otávio Costa Acevedo ◽  
Pablo Eli Soares de Oliveira ◽  
Claudio Alberto Teichrieb ◽  
Franciano Scremin Puhales ◽  
Luis Gustavo Nogueira Martins ◽  
...  
Keyword(s):  
Power Plant ◽  
Thermal Power Plant ◽  
Thermal Power ◽  
Vertical Component ◽  
Low Frequency ◽  
Vertical Wind ◽  
The Other ◽  
Horizontal Wind ◽  
Temporal Scales ◽  
Spectral Maximum

Multiresolution spectra of both horizontal and vertical wind components observed at a 140-m micrometeorological tower are analysed. The tower is located at the township of Linhares, ES, Brazil, at 4 km from the coast and nest to a thermal power plant. At nighttime, the spectral maximum is located at the largest temporal scales analyzed, being therefore related to nonturbulent low-frequency processes. During the day, spectral maxima of the horizontal wind components show little variation above 20 m.For the vertical component, on the other hand, the temporal scale of such maxima increases steadily with height.

ESTIMATION OF THERMAL POWER PLANT WORKERS EXPOSURE TO MAGNETIC FIELDS AND SIMULATION OF HAZARD ZONES

2020 ◽  
Vol 190 (3) ◽  
pp. 289-296
Author(s):  
Majid Bagheri Hosseinabadi ◽  
Narges Khanjani ◽  
Mohammad Hossein Ebrahimi ◽  
Jamal Biganeh
Keyword(s):  
Power Plant ◽  
Magnetic Fields ◽  
Transmission Lines ◽  
Thermal Power Plant ◽  
Power Transmission ◽  
Thermal Power ◽  
Low Frequency ◽  
Exposure Level ◽  
Power Transmission Lines ◽  
Indoor Space

Abstract Extremely low-frequency magnetic fields (ELF-MFs) have raised some concerns due to their possible effects on workers’ health. In this study ELF-MFs were measured in different units of the thermal power plant based on gridding the indoor space. The exposure level was measured by spot measurement based on the IEEE Std C95.3.1 and then simulated in units with the highest magnetic field intensity by using ArcGIS software. The operators and balance of plant (BOP) technicians (12.64 ± 9.74 μT) and office workers (2.41 ± 1.22 μT) had the highest and lowest levels of both measured and estimated ELF-MFs exposure. The highest measured ELF-MFs were in the vicinity of the power transmission lines in the transformers’ building (48.2 μT). Our simulation showed the high and low exposure areas and ranked exposure well; but, the actual measurements of ELF-MFs exposure were in all cases higher than the estimated values, which means we still need to improve our estimations.

Study on Aseismic Behavior of Shear Wall with Frame Column in the Large Thermal Power Plant

2012 ◽  
Vol 446-449 ◽  
pp. 621-625
Author(s):  
Zhao Wu Shen ◽  
She Liang Wang ◽  
Xiang Zhao
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Power Plant ◽  
Thermal Power Plant ◽  
Thermal Power ◽  
Low Frequency ◽  
Shear Wall ◽  
The Finite Element Method ◽  
Element Analysis ◽  
Element Method

In order to analyze aseismic behavior of the high reinforced concrete (R.C.) shear wall with frame column in the large thermal power plant, the model structure has been taken test with method of low frequency cyclic repeated load that has 1/15 scaling factor to practical structure. At same time the model has been analyzed by the finite element method which takes the Hognestad concrete constitutive model and ideal elastic-plasticity steel reinforcement constitutive equation. It has been found that the hysteretic curve is relatively full and energy dissipation capacity is better through the experiment. The bearing capacity, deformation and fracture results to the Shear wall of finite element analysis are closely with the test results. In general, the R.C. shear wall with frame column in the large thermal power plant has good aseismic performance. The finite element method can be taken to analyzed the similarity structure.

Nonlinear Trend Analysis of Mill Fan System Vibrations for Predictive Maintenance and Diagnostics

2012 ◽  
Vol 58 (4) ◽  
pp. 351-356
Author(s):  
Mincho B. Hadjiski ◽  
Lyubka A. Doukovska ◽  
Stefan L. Kojnov
Keyword(s):  
Power Plant ◽  
Trend Analysis ◽  
Thermal Power Plant ◽  
Power Plants ◽  
Thermal Power ◽  
Balkan Peninsula ◽  
Predictive Maintenance ◽  
Nonlinear Trend ◽  
The Subject ◽  
The Given

Abstract Present paper considers nonlinear trend analysis for diagnostics and predictive maintenance. The subject is a device from Maritsa East 2 thermal power plant a mill fan. The choice of the given power plant is not occasional. This is the largest thermal power plant on the Balkan Peninsula. Mill fans are main part of the fuel preparation in the coal fired power plants. The possibility to predict eventual damages or wear out without switching off the device is significant for providing faultless and reliable work avoiding the losses caused by planned maintenance. This paper addresses the needs of the Maritsa East 2 Complex aiming to improve the ecological parameters of the electro energy production process.

FLY ASH FROM THERMAL POWER PLANT, RAW MATERIAL FOR GLASS-CERAMIC

2013 ◽  
Vol 12 (2) ◽  
pp. 337-342 ◽  
Author(s):  
Firuta Goga ◽  
Roxana Dudric ◽  
Calin Cormos ◽  
Florica Imre ◽  
Liliana Bizo ◽  
...  
Keyword(s):  
Fly Ash ◽  
Power Plant ◽  
Glass Ceramic ◽  
Thermal Power Plant ◽  
Thermal Power ◽  
Raw Material ◽  
Plant Raw Material

Estimation of chromosome disorders in workers at coal thermal power plant

2019 ◽  
pp. 149-154 ◽  
Author(s):  
V. I. Minina ◽  
Yu. A. Nelyubova ◽  
Ya. A. Savchenko ◽  
A. A. Timofeeva ◽  
Ye. A. Astafieva ◽  
...  
Keyword(s):  
Power Plant ◽  
Chromosomal Aberrations ◽  
Thermal Power Plant ◽  
Reference Group ◽  
Thermal Power ◽  
West Siberia ◽  
Kuznetsk Coal ◽  
Chromosomal Disorders ◽  
Occupational Environment ◽  
Industrial Enterprises

Introduction. Coal heat power stations are characterized by severe hazardous eff ect of occupational environment on workers. Objective. To analyze chromosomal disorders in workers of thermal power plant working on coal from Kuznetsk coal fi eld (West Siberia). Materials and methods. Th e authors studied level and specter of chromosomal aberrations in blood lymphocytes of 185 workers of Kemerovo thermal power plant and 218 inhabitants of the same location, not working on industrial enterprises (Kemerovo, Russia). For every individual, average number of 200 metaphase plates of high quality was analyzed. Results. Findings are that the workers of thermal power plant have levels of chromosomal aberrations signifi cantly higher than those of reference group (3,01±0,13% vs. 1,45±0,08%; р<0,00001). With that, increased frequency is seen both for chromatid aberrations and for chromosomal ones — that indicates complex exposure to chemical and radiation factors. Conclusions. Th e results obtained necessitate elaboration of measures to decrease genotoxic hazards in the occupational environment.

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