scholarly journals Performance evaluation of a large-scale thermal power plant based on the best industrial practices

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Yousef S. H. Najjar ◽  
Amer Abu-Shamleh
Keyword(s):  
Power Plant ◽  
Thermal Efficiency ◽  
Thermal Power Plant ◽  
Large Scale ◽  
Best Practice ◽  
Thermal Power ◽  
Capacity Factor ◽  
Target Value ◽  
Target Values ◽  
Installed Capacity

AbstractThe aim of this study is to assess and evaluate the performance of a large-scale thermal power plant (TPP). The performance rating was conducted in compliance with the statistical principles. The data for this analysis were obtained for a TPP with an installed capacity of 375 MW during a span of 8 years (2010–2017). Four parameters were used to evaluate the performance of the TPP including the availability, the reliability, the capacity factor, and the thermal efficiency. These parameters were calculated using a set of equations and then compared to the international best practices and target values. The results indicate that approximately 91% of the expected capacity was available throughout the studied period against the industry best practice of 95%. However, the average TPP’s reliability was found to be approximately 95% against the target value of 99.9%. Furthermore, the average capacity factor throughout the studied period is 70% as against the international value of 40–80%. Moreover, the thermal efficiency of the TPP is 40% against the target value of 49%. Due to the outage hours and malfunctions, the power losses throughout the studied period reached 846 MW. Overall, the analysis indicates that the studied TPP is not within the scope of the best industrial practices.

Influence of Condensed Water Temperature on Thermal Efficiency of Coal-Fired Power Plant and Energy Strategy

2014 ◽  
Vol 953-954 ◽  
pp. 818-824
Author(s):  
De Liang Zeng ◽  
Shu Wen Diao ◽  
Yong Hu ◽  
Shan Gao ◽  
Qing Li
Keyword(s):  
Power Plant ◽  
Water Temperature ◽  
Energy Saving ◽  
Steam Turbine ◽  
Wind Power ◽  
Thermal Efficiency ◽  
Thermal Power Plant ◽  
Large Scale ◽  
Thermal Power ◽  
Condensed Water

For the problem of the abandoned large-scale wind power currently, in order to improve the utilization of wind power and make full use of wind resources, a method of using wind power to heat the condensed water through electrothermal furnace is proposed. On the basis of mass and energy conservation, through analyzing variable condition of the regenerative heating system and water-cooled condenser, the dynamic mathematical model is created and then the dynamic influence of condensed water temperature on the economy of thermal power plant is studied. This paper, taking a typical 660MW water-cooled unit as an example, discusses the dynamic characteristics of steam turbine and energy-saving effects of this method. Results show that obvious economic effects can be obtained through non-grid-connected wind power heating the low-pressure condensed water, which can reduce the steam extraction flow from steam turbine, improve the thermal efficiency of thermal power plant and save the amount of coal. It has positive significance to digging energy-saving potential of plant.

scholarly journals CONSTRUCTION OF THE LARGE-SCALE JETTY AT MAIZURU THERMAL POWER PLANT

2002 ◽  
Vol 18 ◽  
pp. 641-646
Author(s):  
Masashi TERADA ◽  
Toshiaki NAKAMURA ◽  
Yasushi OOMASA ◽  
Keiichi OOMURA ◽  
Nobuhiro AKISATO
Keyword(s):  
Power Plant ◽  
Thermal Power Plant ◽  
Large Scale ◽  
Thermal Power

Dual Receiver Concept for Solar Towers up to 100 MW

2005 ◽  
Vol 128 (3) ◽  
pp. 293-301 ◽  
Author(s):  
M. Eck ◽  
R. Buck ◽  
M. Wittmann
Keyword(s):  
Power Plant ◽  
Power Consumption ◽  
Steam Generator ◽  
Thermal Efficiency ◽  
Heat Exchangers ◽  
Thermal Power Plant ◽  
Thermal Power ◽  
Solar Thermal Power ◽  
Hot Air ◽  
Central Receiver

The dual receiver concept presented in this paper improves the adaptation of the central receiver to the steam cycle in a solar thermal power plant. By combination of an open volumetric air heater and a tubular evaporator the dual receiver concept profits from the advantages of these two concepts while their characteristic problems are avoided. The water is evaporated directly in the tubular steam generator; preheating and superheating are done in heat exchangers by using the hot air from the volumetric receiver. This paper presents a concept study that extends previous work on the 10MWel level (Buck et al., 2004, “Dual Receiver Concept for Solar Towers,” Proc. 12th Solar PACES Int. Symposium, Oct. 6–8, Oaxaca, Mexico) to a level of 100MWel, which is the expected power range of future plants. The results confirm the benefits of the new concept, resulting from higher thermal efficiency of the receiver and lower parasitic power consumption. The annual mean efficiency is increased from 13% to 16%. Advantageous are also the reduced thermal loads in the receiver components.

scholarly journals An Optimization Model for Tramp Ship Scheduling considering Time Window and Seaport Operation Delay Factors

2021 ◽  
Vol 2021 ◽  
pp. 1-19
Author(s):  
Ang Yang ◽  
Yu Cao ◽  
Kang Chen ◽  
Qingcheng Zeng ◽  
Zigen Chen
Keyword(s):  
Power Plant ◽  
Thermal Power Plant ◽  
Large Scale ◽  
Time Window ◽  
Programming Model ◽  
Thermal Power ◽  
Scale Model ◽  
Mixed Integer ◽  
Ship Scheduling ◽  
Operation Cost

The quantity of electrical coal transported through the tramp shipping network is increasing due to the high demands. This trend has increased the scheduling difficulty combined with the underdevelopment of the private thermal power plant port. The high coal consumption and low port storage capacity requires the scheduling of the tramp ship to be on a strict time window to ensure the continuous operation of the thermal power plant. The low port unloading capacity often leads to the port congestion and delay of the unloading operation. This paper develops a mixed-integer-programming model for the optimization of the tramp ship scheduling to reduce the total operation cost, including the transportation cost and the unloading waiting cost, and the branch-and-price algorithm is adopted to solve this large-scale model. The model and algorithm are tested with historical operation data from the thermal power plant in the southern coastal areas of China. The optimized scheme significantly reduces the total operation cost by reducing the unloading waiting time and the number of active vessels in certain periods. The results also demonstrate the algorithm improvement in the aspects of the optimization quality and efficiency comparing with the heuristic solution.

Cause Analysis of Plate Pitting Corrosion in Lubricating Oil Cooler of Main Equipment in Datang Weihe Thermal Power Plant

2013 ◽  
Vol 634-638 ◽  
pp. 1677-1681 ◽  
Author(s):  
Zhou Ping Li ◽  
Xiao Jian Hu ◽  
Hai Yan Ma ◽  
Si Wei Yan ◽  
Ai Jun Yan ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Heat Exchanger ◽  
Power Plant ◽  
Thermal Power Plant ◽  
Large Scale ◽  
Thermal Power ◽  
Cooling Water ◽  
304 Stainless Steel ◽  
Lubricating Oil ◽  
Oil Cooler

The plate heat exchanger in oil cooler of unit 2 in a thermal power plant became corrosion perforation after 2-year running, and severe pits were found on its surface. The material and scale composition of the lubricating oil cooler was analyzed, and it was found that the oil cooler was made of 304 stainless steel, instead of the 316 stainless steel provided by factory. The corrosion products on the corroded surface were composed of some characteristic elements in cooling water. The analysis suggested that the reason for corrosion perforation of the heat exchanger could be associated with its material composition, and the under scale corrosion formed under the action of scale deposition could also cause corrosion perforation and large-scale pits.

scholarly journals Possible efficiency improvement by application of various operating regimes for the cooling water pump station at thermal power plant - Bitola

2012 ◽  
Vol 16 (1) ◽  
pp. 263-270
Author(s):  
Vladimir Mijakovski ◽  
Vangelce Mitrevski ◽  
Nikola Mijakovski
Keyword(s):  
Power Plant ◽  
Thermal Power Plant ◽  
Cooling Tower ◽  
Thermal Power ◽  
Cooling Water ◽  
Operating Characteristics ◽  
Pump Station ◽  
The Republic ◽  
Installed Capacity ◽  
Operating Regimes

Thermal power plant (TPP) - Bitola is the largest electricity producer in the Republic of Macedonia with installed capacity of 691 MW. It is a lignite fired power plant, in operation since 1982. Most of the installed equipment is of Russian origin. Power plant's cold end comprised of a condenser, pump station and cooling tower is depicted in the article. Possible way to raise the efficiency of the cold end by changing the operating characteristics of the pumps is presented in the article. Diagramic and tabular presentation of the working characteristics of the pumps (two pumps working in paralel for one block) with the pipeline, as well as engaged power for their operation are also presented in this article.

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