scholarly journals Characterization of power plant noise by coherence technique

1978 ◽  
Vol 64 (S1) ◽  
pp. S12-S12
Author(s):  
S. P. Ying ◽  
K. R. Baki ◽  
E. E. Dennison
Keyword(s):  
Power Plant

Characterization of surge superposition following 2-stage load rejection in hydroelectric power plant

2016 ◽  
Vol 43 (9) ◽  
pp. 844-850 ◽  
Author(s):  
Sheng Chen ◽  
Jian Zhang ◽  
Xichen Wang
Keyword(s):  
Power Plant ◽  
Analytical Formula ◽  
Hydroelectric Power Plant ◽  
Hydroelectric Power ◽  
Surge Tank ◽  
Time Intervals ◽  
Interval Time ◽  
Unexpected Phenomenon

When calculating the maximum upsurge in surge tank due to load rejection in a hydroelectric power plant, it has been natural and customary to believe that the maximum surge amplitude occurs in simultaneous load rejection of all units at 100% load. As 2-stage load rejection (2-stage LR), involving a step-wise reduction in load, is not considered since it is assumed to produce less severe surge conditions. This study formulates the surge superposition associated with 2-stage LR and shows, surprisingly but significantly, that such 2-stage LR sometimes produces more severe surge conditions than simultaneous and complete load rejection (SCLR). The results indicate that this unexpected phenomenon is ascribable to the resistant effect of throttled surge tank, whose increase will lead to a greater difference in the maximum upsurges between 2-stage LR and SCLR conditions. Different time intervals during 2-stage LR correspond to different maximum upsurges. The analytical formula predicting the worst interval time is derived exactly and verified with two numerical cases.

Use of Ashes from Biomass Combustion as an Aggregate for Concrete

2019 ◽  
Vol 958 ◽  
pp. 111-115
Author(s):  
V.A.S. Schein ◽  
G. Conte ◽  
Marilena Valadares Folgueras ◽  
L.V.O. Dalla Valentina ◽  
M.R. Medeiros
Keyword(s):  
Compressive Strength ◽  
Power Plant ◽  
Environmentally Friendly ◽  
Biomass Combustion ◽  
Chemical Analyses ◽  
Structural Concrete ◽  
Mixing Ratios ◽  
Physical And Chemical ◽  
Biomass Ashes

This paper discusses an environmentally-friendly destination for the residual ashes resulting from the firing of biomass (wood wastes) at the Engie Brasil Cogeneration Power Plant located in Lages, Santa Catarina, Brazil. The study proposes reusing the residue as a substitution for crushed stones in the production of concrete. Environmental, physical, and chemical analyses were performed for characterization of the ashes. Specimens prepared with ash and subjected to testing presented a compressive strength of around 18.63 Mpa (2700 psi), which is in compliance with the ACI-213R and ASTM C330-5 specifications. With pretreatment and proper mixing ratios, biomass ashes may be employed as an aggregate in the manufacture of lightweight structural concrete.

Characterization of Tube Repair Weld in Thermal Power Plant Made of a 12%Cr Tempered Martensite Ferritic Steel

2016 ◽  
pp. 151-169
Author(s):  
Gordana M. Bakic ◽  
Milos B. Djukic ◽  
Bratislav Rajicic ◽  
Vera Sijacki Zeravcic ◽  
Aleksandar Maslarevic ◽  
...  
Keyword(s):  
Power Plant ◽  
Thermal Power Plant ◽  
Ferritic Steel ◽  
Thermal Power ◽  
Tempered Martensite ◽  
Tube Repair

Radiological characterization of Cayırhan coal-fired power plant in Turkey

Fuel ◽  
2007 ◽  
Vol 86 (16) ◽  
pp. 2509-2513 ◽  
Author(s):  
U. Cevik ◽  
N. Damla ◽  
S. Nezir
Keyword(s):  
Power Plant ◽  
Radiological Characterization

Modeling and Control of Subcritical Coal-Fired Power Plant Components for Fault Detection

2020 ◽  
Author(s):  
Selorme Agbleze ◽  
Fernando V. Lima ◽  
Natarianto Indrawan ◽  
Rupendranath Panday ◽  
Paolo Pezzini ◽  
...  
Keyword(s):  
Power Plant ◽  
Fault Detection ◽  
Power Plants ◽  
Energy Content ◽  
Leak Detection ◽  
Primary Component ◽  
Plant Performance ◽  
Saturated Steam ◽  
Power Sources

Abstract Due to the increased penetration of renewable power sources into the electric grid, the current number of existing coal-fired power plants shifting from baseload to load-following operations has also increased. This shift creates challenges especially for the power industry as coal-fired power plants were not designed for ramping situations, leading to added stress on major components of these plants. This stress causes the system to degrade over time and eventually develop faults. As boilers are still the primary component that fails and causes forced outages, accurate characterization of faults and fractures of boilers is now becoming increasingly critical to reduce plant downtime and extend the plant life during cycling operations. This work focuses on modeling sections of a subcritical coal-fired power plant and proposes algorithms for fault detection in MATLAB/Simulink. The developed model simulates the process dynamics including steam and feedwater flow regulating valves, drum-boiler, and heat rate on the regulation of pressure, drum level and production of saturated steam. The model also simulates the dynamics of superheaters for increasing the energy content of steam, and a spray section for regulating the temperature of steam upstream of the high-pressure turbine to allow for power output adjustment within a given valve operating range. Furthermore, an extension to a leak detection framework proposed by co-authors in previous work is explored. The new framework includes a modification to the threshold analysis portion of the previous work. The extended framework is then applied to a subcritical coal-fired power plant model for leak detection. In particular, this framework analyzes mismatches or deviations in expected plant dynamics with an identified transfer function model. The mismatch is flagged after it exceeds a threshold. The developed algorithm thus aids in rapid detection of faults to reduce impeded plant performance. The results of this work will support real plant operations by providing an accurate characterization of faults in the operation of coal-fired power plants.

scholarly journals Correction to: Characterization of feed coal and combustion by-products from Kemerkoy power plant in Turkey

2019 ◽  
Vol 12 (11) ◽  
Author(s):  
Gul Akar Sen ◽  
Hatice Yilmaz ◽  
Sezai Sen ◽  
Vedat Arslan ◽  
Uner Ipekoglu
Keyword(s):  
Power Plant ◽  
Feed Coal ◽  
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