The Development of Device for On-Line Monitoring Circulating Cooling Water Stability

2014 ◽  
Vol 672-674 ◽  
pp. 1743-1747
Author(s):  
Li Qiang Zhang ◽  
Mo Jie Sun ◽  
Ting Zhang ◽  
Zhao Li ◽  
Huan Wei Wang
Keyword(s):  
Power Plants ◽  
Cooling Water ◽  
Stability Index ◽  
Scientific Basis ◽  
Water Quantity ◽  
Water Stability ◽  
Circulating Cooling Water ◽  
On Line ◽  
The Stability ◽  
And Control

China is a country lacking of freshwater. With the water pollution from bad to worse, saving water become a serious matter which needs to be settled at once. In order to ensure the system working safely and the water quality, most power plants enable the circle cooling water to work in the low consistence, need more drainage and complement water which will make large waste of water. The good water quantity means that the water doesn’t make the furring and make cautery to the equipment. So we can improve the concentrated multiples of the cycle cooling water to save the water. Based on the specialty of the water used in the power plants, this subject study how to estimate the stability, doing the instrument and watching the stability degree, providing the scientific basis for disposing the circling water. After lots of experiments, we use the stability index as the estimation and use the pH determination as the alkalinity determination.The instrument uses the date collecting card to collect and use computer to dispose the date and control the instrument. The system inspects the stability of the cycle cooling water real time automatically.

Research and Discussion on Electro-Magnetic Treatment in Circulating Cooling Water of Power Plant

2013 ◽  
Vol 732-733 ◽  
pp. 382-386
Author(s):  
Ni Zhang Xiao ◽  
Nan Zhang Xiao ◽  
Long Wu Wen ◽  
Rui Ju Zhao ◽  
Chun Lei Zhang
Keyword(s):  
Power Plant ◽  
Chemical Treatment ◽  
Power Plants ◽  
Water System ◽  
Cooling Water ◽  
Magnetic Treatment ◽  
Treatment Technology ◽  
Cooling Water System ◽  
Circulating Cooling Water ◽  
Electro Magnetic

The effects of anti-scale, anti-corrosion and disinfection of circulating cooling water with electro-magnetic treatment and chemical treatment in the laboratory are compared. The applications of electro-magnetic treatment in power plants are summarized and discussed. The results of both experiments and applications in power plants show that the electro-magnetic treatment can be used in particular conditions, but the development of electro-magnetic treatment technology is immature. This technology used in circulating cooling water system in power plants should be further proved by more experiments and field applications.

A Risk-Informed On-Line Test and Maintenance Framework for Redundant Instrumentation and Control Systems in Nuclear Power Plants

2004 ◽  
Author(s):  
Lixuan Lu ◽  
Jin Jiang
Keyword(s):  
Reliability Analysis ◽  
Control Systems ◽  
Nuclear Power ◽  
Safety Assessment ◽  
Power Plants ◽  
Nuclear Power Plants ◽  
Energy Market ◽  
On Line ◽  
Line Test ◽  
And Control

Deregulation forces Nuclear Power Plants (NPPs) to operate not only safely, but also more economically. Instrumentation and Control (I&C) systems in NPPs play an important role to reduce operational related costs. Therefore, a well-planned test and maintenance (T&M) strategy for I&C systems is more important then ever in this deregulated energy market. This paper presents a general T&M framework for digital I&C systems in NPPs. There are three main parts within this framework: probabilistic safety assessment (PSA), reliability analysis, and costs evaluation. PSA is used to set risk-informed unavailability limits. Reliability analysis is used to derive the relation between the unavailability and the T&M interval. Costs associated with not only T&M, but also reactor mal-shutdowns are evaluated. The Shutdown System Number One (SDSI) in Canadian Deuterium-Uranium (CANDU) based NPPs is used as an example system to illustrate the proposed framework.

The Study on Water Conservation in Thermal Power Plants

2014 ◽  
Vol 675-677 ◽  
pp. 1716-1720 ◽  
Author(s):  
Jian Lei Zhou ◽  
Yu Yun Fu
Keyword(s):  
Water Conservation ◽  
Power Plants ◽  
Thermal Power ◽  
Water System ◽  
Cooling Water ◽  
Working Fluid ◽  
Feed Water ◽  
Thermal Power Plants ◽  
Transfer Energy ◽  
Circulating Cooling Water

As the main working fluid pair to transfer energy and cool down the equipment, water is used in a large amount in thermal power plants. It will promote water conservation and resource recycling if the water use is managed effectively in production and the wastewater, which come from circulating cooling water system, the pretreatment in boiler feed water preparation system, desalination system and condensate polishing system, is disposed and recycled well.

The Coking Wastewater Treatment and Reuse of Depth

2011 ◽  
Vol 347-353 ◽  
pp. 1310-1313
Author(s):  
Xiu Hui Zhu ◽  
Yue Shen ◽  
Ting Ting Peng ◽  
Lian Yu He ◽  
Geng Han Yang ◽  
...  
Keyword(s):  
Water Quality ◽  
Cooling Water ◽  
Effluent Treatment ◽  
Coking Wastewater ◽  
Circulating Cooling Water ◽  
Added Water ◽  
Quality Stability ◽  
Level 1 ◽  
Combination Of Methods ◽  
And Control

Use water quality stability theory, through the experiment find coking wastewater as cooling water added water treatment and control technology. The static and dynamic combination of methods, will coking wastewater biochemical treatment to countries after “the comprehensive sewage discharge standards “(GB8978-1996 level 1) as an experimental water, water by the MBR membrane bioreactor, deep treatment after deep treatment of water corrosion and scale water quality stable, and the effluent treatment can satisfy enterprise circulating cooling water added water quality requirements.

scholarly journals Integrated allocation model of water quantity and quality and its application in the Yellow River

2020 ◽  
Vol 20 (8) ◽  
pp. 3768-3778
Author(s):  
Ke Zhou
Keyword(s):  
Data Transmission ◽  
Yellow River ◽  
Water Quantity ◽  
The Yellow River ◽  
Time Data ◽  
Allocation Model ◽  
Line Identification ◽  
On Line ◽  
And Control ◽  
Water Quantity And Quality

Abstract Taking a typical reach of the Yellow River as the research object, using decomposition, coordination, coupling and control technology and through real-time data transmission and feedback, the simultaneous coupling of water quantity and quality is realized. Based on the identification parameters of water intake, section discharge and water quality index in the water function areas, the on-line identification and process control of the allocation target are realized, and an integrated model of water quantity and quality with the functions of cycle iteration, on-line feedback and rolling correction is established. Taking the natural runoff from 1956 to 2000 as input and the water demand and sewage discharge from the upper reaches of the Yellow River in 2015 as an example and through optimization, an integrated water quantity and quality allocation scheme for the typical reach of the Yellow River is put forward. It is shown that the model can realize the integrated allocation of water quantity and quality in the Yellow River.

Thermodynamic modelling and simulation of geothermal power plants: case studies and environmental impact

2021 ◽  
Author(s):  
Vitantonio Colucci ◽  
Angelo Damone ◽  
Giampaolo Manfrida ◽  
Daniele Fiaschi
Keyword(s):  
Power Plants ◽  
Liquid Mixtures ◽  
Pollutant Emissions ◽  
Geothermal Fluids ◽  
Framework Model ◽  
On Line ◽  
Geothermal Power ◽  
And Control ◽  
Excellent Tool ◽  
Complicated Task

<p>The emissions associated with Geothermal power plant (GTPP) due to geothermal fluids represents a compelling challenge addressed in the last decades. The on-line measuring of pollutants generated by GTPP might result in a complicated task to handle. Simulation of GTPP has become an excellent tool to monitor and control the emission of pollutants. In the present work, the pollutant emissions of GTPP of Hellisheidi (Island), Chiusdino, and Castelnuovo (Italy) are modelled and developed with Unisim Design R480 using well understood thermodynamical models implemented in OLI. The presence of brine in the thermodynamical models has been taken into account. Carbon dioxide, methane, and hydrogen sulfide are the chemical pollutants considered for the process simulation. The AQ framework model in OLI is being used for binary mixtures and non-condensable gas. Furthermore, for liquid mixtures containing more than two components, the MSE-SRK Thermodynamic model is desirable depending on the original geothermal fluid source. The simulation process outcome agrees with experimental data for pressure between 30 and 100 bar within 5% deviation. A systematic study of the spatial distribution of the emissions has been made for the area surrounding the GTPP. Furthermore, an economic evaluation overview has been performed to highlight the equipment needed for maintenance and tool substitution.</p>

scholarly journals Real-time voltage stability monitoring model of wind power plant penetration in electrical power system networks

2021 ◽  
Vol 926 (1) ◽  
pp. 012031
Author(s):  
A M Ilyas ◽  
A Suyuti ◽  
I C Gunadin ◽  
S M Said
Keyword(s):  
Real Time ◽  
Wind Power ◽  
Power Plants ◽  
Voltage Stability ◽  
Stability Index ◽  
Line Number ◽  
Monitoring Model ◽  
Wind Power Plants ◽  
South Sulawesi ◽  
The Stability

Abstract The intermittent output power of wind power plants can affect the stability of the power grid, so a real-time monitoring model is needed. This study uses data from the southern Sulawesi network which is interconnected with wind power plants in real-time, and the IEEE 30 bus data is used as method validation. The method used is the New Voltage Stability Index (NVSI) based on Matlab. The results of the stability index on the IEEE 30 bus data are < 1 or are at the standard of stable criteria, namely 0.95 p.u. The result of the stability index of the South Sulawesi network is line number 49 from Latuppa to Poso has the highest value of 0.0473, the second is line number 18 from Bosowa to Tello is 0.0390, and the third is line number 24 from Tello 30kV to Barawaja is 0.0221, the other bus voltages have lower values. So it can be concluded that the network of South Sulawesi is stable, and intermittent wind power has no effect on voltage stability.

Dynamic Simulation Study on Anti-Scaling Corrosion Inhibitors of Circulating Cooling Water for Thermal Power Plants

2012 ◽  
Vol 441 ◽  
pp. 772-776
Author(s):  
Mo Jie Sun ◽  
Peng Wang ◽  
Chun Guang Liu ◽  
Yu Han Shan ◽  
Chun Biao Zhang ◽  
...  
Keyword(s):  
Dynamic Simulation ◽  
Power Plants ◽  
Thermal Power ◽  
Cooling Water ◽  
National Standards ◽  
Test Method ◽  
Thermal Power Plants ◽  
High Concentration ◽  
Water Condition ◽  
Circulating Cooling Water

In order to choose one elixir from three anti-scaling inhibitors A, B and C that most suits for the circulating cooling water in thermal power plants under certain water condition, we used the dynamic simulation test method in this paper. Under high concentration rate (4.0), we comprehensively analyzed the three elixirs from the factors of their anti-scaling, corrosion and economical performances. According to the results, it was confirmed that elixir B displayed the relevant good properties for the water condition of the power plant. Meantime, the elixir components of the three elixirs were analyzed, and the results showed that all the indexes of them were in conformity with the national standards.

scholarly journals Area-Based COI-Referred Rotor Angle Index for Transient Stability Assessment and Control of Power Systems

2012 ◽  
Vol 2012 ◽  
pp. 1-23 ◽  
Author(s):  
Noor Izzri Abdul Wahab ◽  
Azah Mohamed
Keyword(s):  
Power Systems ◽  
Power System ◽  
Transient Stability ◽  
Stability Index ◽  
Test System ◽  
Emergency Control ◽  
Control Scheme ◽  
Rotor Angle ◽  
The Stability ◽  
And Control

This paper describes an index for judging the severity of transient events of power systems in simulation. The proposed transient stability index, known as the area-based COI-referred rotor angle index, is developed by considering the fact that a large-sized power system is divided into several areas according to the coherency of generators in a particular area. It can be assumed that an equivalent single large machine can represent all the generators in that area. Thus, the assessment of rotor angles for all generators can be simplified by only assessing the index of areas in a power system. The effectiveness of the proposed index in assessing the stability of power systems and its ability in pinpointing the weakest area in the power system is analyzed. Furthermore, this paper developed an emergency control scheme known as the combined UFLS and generator tripping in order to stabilize the system when unstable faults occurred in a power system. The proposed index is used to identify the generator to be tripped when the developed emergency control scheme operates. The performance of the proposed index and the combined UFLS and generator tripping scheme are evaluated on the IEEE 39-bus test system.

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