scholarly journals Analysis of Coal-Fired Power Unit Operation in Reduced Minimum Safe Load Regime

2018 ◽  
Author(s):  
Piotr Żymełka ◽  
Maciej Żyrkowski ◽  
Maciej Bujalski
Keyword(s):  
Power Unit ◽  
Unit Operation ◽  
Load Regime ◽  
Safe Load

A Data Mining Rule Extraction Method for Thermal Power Unit Operation Optimization

2009 ◽  
Vol 42 (13) ◽  
pp. 683-688
Author(s):  
Yang Tingting ◽  
Zeng Deliang ◽  
Chang Taihua ◽  
Zhang Zhigang ◽  
Liu Jizhen
Keyword(s):  
Data Mining ◽  
Power Unit ◽  
Extraction Method ◽  
Thermal Power ◽  
Rule Extraction ◽  
Unit Operation ◽  
Operation Optimization

scholarly journals Improving the power unit operation flexibility by the turbine start-up optimization

Energy ◽  
2020 ◽  
Vol 198 ◽  
pp. 117303 ◽  
Author(s):  
Grzegorz Nowak ◽  
Andrzej Rusin ◽  
Henryk Łukowicz ◽  
Martyna Tomala
Keyword(s):  
Power Unit ◽  
Unit Operation ◽  
Start Up ◽  
Operation Flexibility

scholarly journals Off-line washing effectiveness on a multistage axial compressor

2021 ◽  
Vol 312 ◽  
pp. 11016
Author(s):  
Nicola Aldi ◽  
Nicola Casari ◽  
Ettore Fadiga ◽  
Riccardo Friso ◽  
Stefano Oliani ◽  
...  
Keyword(s):  
Power Unit ◽  
Gas Turbines ◽  
Water Flow Rate ◽  
Axial Compressor ◽  
Operating Conditions ◽  
Unit Operation ◽  
Compressor Unit ◽  
Water Droplets ◽  
Washing Process ◽  
Multistage Axial Compressor

The interaction between gas turbines and airborne particles determines detrimental effects on the performance, efficiency, and reliability of the power unit. When it is possible, the interaction is reduced by the use of inlet separators and filtration systems. In an aero engine, these barriers are difficult to implement, and only bigger particles (usually greater than 10 μm) are separated from the airflow. Small units, especially those equips helicopters, are usually affected by fouling issues, especially when the aircraft is employed in harsh environments such as firefighting and rescue activities. To recover this contamination, the unit is washed after the mission by ground operations to restore the unit performance by removing the deposits. This operation occurs during a sub-idle unit operation, and the washing process has to be effective when the engine operates in this off-design condition. In this paper, the evaluation of the washing performance during a sub-idle unit operation is carried out. The compressor unit is a multistage axial compressor that equips the Allison 250-C18 engine. The washing operation was performed by water, and a sensitivity analysis is carried out to discover the capability of water droplets to remove the contaminants. The experimental analysis involves the contamination of the unit by micro-sized soot particles and a washing operation by micro-sized water droplets. These experimental results are compared to numerical simulations to discover the effects of the washing operation on a small power unit during sub-idle operating conditions. The off-design regime imposes a specific evaluation of the proper setup of the washing strategy: flow separations involve wider regions in the compressor unit, and the removal capability is strongly related to the droplet path through the stages. The results show how in the off-design washing operation, the droplet diameter has greater importance than the water flow rate for reducing the deposits over the compressor stages.

Assessment of the rise in the turbine operation risk due to increased cyclicity of the power unit operation

Energy ◽  
2016 ◽  
Vol 96 ◽  
pp. 394-403 ◽  
Author(s):  
Andrzej Rusin ◽  
Michał Bieniek ◽  
Marian Lipka
Keyword(s):  
Power Unit ◽  
Unit Operation ◽  
Operation Risk

Approximation of Payback Period of Fuel Cell Auxiliary Power Unit for Large Trucks

2009 ◽  
Vol 129 (2) ◽  
pp. 228-229
Author(s):  
Noboru Katayama ◽  
Hideyuki Kamiyama ◽  
Yusuke Kudo ◽  
Sumio Kogoshi ◽  
Takafumi Fukada
Keyword(s):  
Fuel Cell ◽  
Power Unit ◽  
Payback Period ◽  
Auxiliary Power Unit ◽  
Auxiliary Power

Polycaprolactone based membranes for the degradation of diclofenac present in water samples using ZnO nanoparticles as the active agent

MRS Advances ◽  
2020 ◽  
Vol 5 (61) ◽  
pp. 3153-3161
Author(s):  
Marco Antonio Juárez Sánchez ◽  
Miguel Ángel Meléndez Lira ◽  
Celestino Odín Rodríguez Nava
Keyword(s):  
Zno Nanoparticles ◽  
Wastewater Treatment Plants ◽  
Active Agent ◽  
Heterogeneous Photocatalysis ◽  
Nano Particles ◽  
Electrical Characteristics ◽  
Unit Operation ◽  
Fields Of Study ◽  
Drug Contamination ◽  
Positive Results

AbstractDrug contamination in water is one of the current fields of study. Since 1990, the presence of drugs in drinking water has been a concern to scientists and public. In Mexico, these organic compounds are not efficiently removed in wastewater treatment plants; therefore, alternative methodologies have been studied that allow these compounds to have a high percentage of degradation or be completely degraded. One example of these techniques is heterogeneous photocatalysis which has obtained positive results in the degradation of drugs using ZnO nanoparticles. These are commonly selected for their electrical characteristics, even though they disperse in water and an additional unit operation is required to separate them from the liquid medium. To eliminate drugs with nano particles in a single stage, polycaprolactone-based membranes with adhered ZnO nanoparticles, by means of electrospinning, were prepared to degrade drugs such as diclofenac. The technique used has shown to efficiently break down diclofenac in 4 hours according to the capillary electrophoresis readings.

Analyzing the Parameters of a Synchronous Generator with Superconducting Windings for a Self-Contained Electric Power Unit

2018 ◽  
Vol 5 (5) ◽  
pp. 33-38
Author(s):  
Konstantin L. KOVALEV ◽  
◽  
Vladimir T. PENKIN ◽  
Valery S. SEMENIKHIN ◽  
Yekaterina Ye TULINOVA ◽  
...  
Keyword(s):  
Electric Power ◽  
Power Unit ◽  
Synchronous Generator

The replacement of the T-250/300-23,5 turbine at power unit no. 9 Of CHPP-22, MOSENERGO PJSC

2018 ◽  
Vol 11 (1) ◽  
pp. 68-74
Author(s):  
V. M. Neuymin
Keyword(s):  
Power Unit

Electric auxiliary power unit for Shuttle evolution

1989 ◽  
Author(s):  
DOUG MEYER ◽  
KENT WEBER ◽  
WALTER SCOTT
Keyword(s):  
Power Unit ◽  
Auxiliary Power Unit ◽  
Auxiliary Power

Withdrawal: Numerical Investigation of a VTOL Power Unit Based on Gas-Driven Fan

2019 ◽  
Author(s):  
Yang Zhou ◽  
Guoping Huang ◽  
Lei Li
Keyword(s):  
Numerical Investigation ◽  
Power Unit
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