The Experts below are selected from a list of 297 Experts worldwide ranked by ideXlab platform
Aleksandra B Nastasovic - One of the best experts on this subject based on the ideXlab platform.
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extensive Feedwater quality control and monitoring concept for preventing chemistry related failures of boiler tubes in a subcritical thermal power plant
Applied Thermal Engineering, 2013Co-Authors: Sonja Vidojkovic, Antonije Onjia, Branko Matovic, Nebojsa Grahovac, Vesna Maksimovic, Aleksandra B NastasovicAbstract:Abstract Prevention and minimizing corrosion processes on steam generating equipment is highly important in the thermal power industry. The maintenance of Feedwater quality at a level corresponding to the standards of technological designing, followed by timely respond to the fluctuation of measured parameters, has a decisive role in corrosion prevention. In this study, the comprehensive chemical control of Feedwater quality in 210 MW Thermal Power Plant (TPP) was carried out in order to evaluate its potentiality to assure reliable function of the boiler and discover possible irregularity that might be responsible for frequent boiler tube failures. Sensitive on-line and off-line analytical instruments were used for measuring key and diagnostic parameters considered to be crucial for boiler safety and performances. Obtained results provided evidences for exceeded levels of oxygen, silica, sodium, chloride, sulfate, copper, and conductivity what distinctly demonstrated necessity of Feedwater control improvement. Consequently, more effective Feedwater quality monitoring concept was recommended. In this paper, the explanation of presumable root causes of corrosive contaminants was given including basic directions for their maintenance in proscribed limits.
Sonja Vidojkovic - One of the best experts on this subject based on the ideXlab platform.
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extensive Feedwater quality control and monitoring concept for preventing chemistry related failures of boiler tubes in a subcritical thermal power plant
Applied Thermal Engineering, 2013Co-Authors: Sonja Vidojkovic, Antonije Onjia, Branko Matovic, Nebojsa Grahovac, Vesna Maksimovic, Aleksandra B NastasovicAbstract:Abstract Prevention and minimizing corrosion processes on steam generating equipment is highly important in the thermal power industry. The maintenance of Feedwater quality at a level corresponding to the standards of technological designing, followed by timely respond to the fluctuation of measured parameters, has a decisive role in corrosion prevention. In this study, the comprehensive chemical control of Feedwater quality in 210 MW Thermal Power Plant (TPP) was carried out in order to evaluate its potentiality to assure reliable function of the boiler and discover possible irregularity that might be responsible for frequent boiler tube failures. Sensitive on-line and off-line analytical instruments were used for measuring key and diagnostic parameters considered to be crucial for boiler safety and performances. Obtained results provided evidences for exceeded levels of oxygen, silica, sodium, chloride, sulfate, copper, and conductivity what distinctly demonstrated necessity of Feedwater control improvement. Consequently, more effective Feedwater quality monitoring concept was recommended. In this paper, the explanation of presumable root causes of corrosive contaminants was given including basic directions for their maintenance in proscribed limits.
Jiao Zeng-geng - One of the best experts on this subject based on the ideXlab platform.
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Simulation Modeling and Realization of Feedwater Pump with Regard to the Influence of Cavitation
Computer Simulation, 2005Co-Authors: Jiao Zeng-gengAbstract:According to the requirement of the steam power plant simulator, Feedwater pump's modeling and realization method are studied with regard to the influence of cavitation in this paper. Character of Feedwater pump used in the steam power plants changes frequently and enormously. Feedwater pump works at different speed, its simulation plays an important and key role in the complete simulation of the thermal-hydraulic character of steam power plant. Because its performance is influenced by cavitation greatly, simulation with regard to the influence of cavitation is of significance to the improvement of the simulation precision of the steam power plant simulator under different normal working situation as well as accidents. The model constructed has simple form, has high precision as well as covers the wide operation situation of the Feedwater pump. The simulation model and numerical method are referential to the same type of Feedwater pump.
Graham J Nathan - One of the best experts on this subject based on the ideXlab platform.
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impact of the operation of non displaced Feedwater heaters on the performance of solar aided power generation plants
Energy Conversion and Management, 2017Co-Authors: Jiyun Qin, Graham J NathanAbstract:Abstract Solar Aided Power Generation is a technology in which low grade solar thermal energy is used to displace the high grade heat of the extraction steam in a regenerative Rankine cycle power plant for Feedwater preheating purpose. The displaced extraction steam can then expand further in the steam turbine to generate power. In such a power plant, using the (concentrated) solar thermal energy to displace the extraction steam to high pressure/temperature Feedwater heaters (i.e. displaced Feedwater heaters) is the most popular arrangement. Namely the extraction steam to low pressure/temperature Feedwater heaters (i.e. non-displaced Feedwater heaters) is not displaced by the solar thermal energy. In a Solar Aided Power Generation plants, when solar radiation/input changes, the extraction steam to the displaced Feedwater heaters requires to be adjusted according to the solar radiation. However, for the extraction steams to the non-displaced Feedwater heaters, it can be either adjusted accordingly following so-called constant temperature strategy or unadjusted i.e. following so-called constant mass flow rate strategy, when solar radiation/input changes. The previous studies overlooked the operation of non-displaced Feedwater heaters, which has also impact on the whole plant’s performance. This paper aims to understand/reveal the impact of the two different operation strategies for non-displaced Feedwater heaters on the plant’s performance. In this paper, a 300 MW Rankine cycle power plant, in which the extraction steam to high pressure/temperature Feedwater heaters is displaced by the solar thermal energy, is used as study case for this purpose. It was found that plant adopting the constant temperature strategy is generally better than that adopting the constant mass flow rate strategy. However, if rich solar energy is available, adopting the constant mass flow rate strategy can achieve better performance.
Antonije Onjia - One of the best experts on this subject based on the ideXlab platform.
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extensive Feedwater quality control and monitoring concept for preventing chemistry related failures of boiler tubes in a subcritical thermal power plant
Applied Thermal Engineering, 2013Co-Authors: Sonja Vidojkovic, Antonije Onjia, Branko Matovic, Nebojsa Grahovac, Vesna Maksimovic, Aleksandra B NastasovicAbstract:Abstract Prevention and minimizing corrosion processes on steam generating equipment is highly important in the thermal power industry. The maintenance of Feedwater quality at a level corresponding to the standards of technological designing, followed by timely respond to the fluctuation of measured parameters, has a decisive role in corrosion prevention. In this study, the comprehensive chemical control of Feedwater quality in 210 MW Thermal Power Plant (TPP) was carried out in order to evaluate its potentiality to assure reliable function of the boiler and discover possible irregularity that might be responsible for frequent boiler tube failures. Sensitive on-line and off-line analytical instruments were used for measuring key and diagnostic parameters considered to be crucial for boiler safety and performances. Obtained results provided evidences for exceeded levels of oxygen, silica, sodium, chloride, sulfate, copper, and conductivity what distinctly demonstrated necessity of Feedwater control improvement. Consequently, more effective Feedwater quality monitoring concept was recommended. In this paper, the explanation of presumable root causes of corrosive contaminants was given including basic directions for their maintenance in proscribed limits.
