The WGC-2005 World Geothermal Congress

Povarov, O. A.; Tomarov, G. V.

doi:10.1134/s0040601506030128

Cited by 7 publications

(3 citation statements)

References 2 publications

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“…This film remains stable and unaltered for an extended period (over 2 years) after dosing, 29,33 enabling the conservation of power plant equipment during short or long shutdown periods. 3,4,29,32,[34][35][36] The aliphatic groups are interconnected through attractive van der Waals forces, which enhance the adhesion of FFA onto the metal surface. Considering the lack of sufficient data and the existence of different theories, with some supporting a monolayer 27 and others favoring a multiple layer 7 adsorption mechanism, further research on this subject is warranted.…”

Section: Physical and Chemical Properties Of Ffamentioning

confidence: 99%

Thermal stability of film forming amines‐based corrosion inhibitors in high temperature power plant water solutions

Vidojkovic,

Mijajlovic,

Lindeboom

et al. 2023

Energy Science & Engineering

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Film forming amines (FFA) are corrosion inhibitors added to power plant water. The major concern associated with their application is the thermal stability in the high temperature power plant water medium, along with the risk of decomposition into low molecular weight organic acids that can cause corrosive damages in the water/steam cycle. However, there is still a lack of sufficient data on the thermal stability of FFA corrosion inhibitors. This paper presents a comprehensive critical review and state‐of‐the‐art assessment of the results obtained from studying the thermolysis of FFA corrosion inhibitors in power plant water/steam cycle conditions, highlighting the relevance for practical application and research needs. Temperature, exposure time, initial concentration, and alkalizing agents were identified as key factors influencing the thermal stability of FFA in high temperature power plant water. Organic acids are found in concentrations harmless to metal tubes. Advanced scientific background information and additional research are required on this topic.

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Section: Physical and Chemical Properties Of Ffamentioning

confidence: 99%

Thermal stability of film forming amines‐based corrosion inhibitors in high temperature power plant water solutions

Vidojkovic,

Mijajlovic,

Lindeboom

et al. 2023

Energy Science & Engineering

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“…One of the most effective ways of saving organic primary fuel in heat supply systems is the use of heat pump plants allowing transforming low-temperature renewable natural energy and secondary low-potential heat to higher temperatures suitable for heat supply [8][9][10][11]. Heat pumps use (utilize) diffused heat of natural (thermal energy of water, air, soil) or technogenic origin (heat of industrial and sewage water, ventilation pipes and flue gases, technological processes, etc.).…”

Section: Ways Of Utilizing Diffused Heatmentioning

confidence: 99%

Use of low potencial wastewater heat

et al. 2019

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The article points out that exhaustion of fossil stocks of fuel and negative impacts of fuel burning on environment determined a significant interest in technologies of heat utilization of low-potential sources in many developed countries of the world. Therefore the solution of the problem of using heat utilization technologies of low-potential sources will be of great importance for preserving people's habitats. In Russia, the most promising area of using unconventional energy sources is heat supply systems of houses and buildings. The conducted analysis shows that one of the effective directions of energy saving is heat pump systems of heat supply, using the most available low potential heat source of flooded massif of soil. It is noted that a huge energy potential of water pumped from closed mines is practically unused because of considerable distance of heat consumers from water purification complexes.

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“…Этому процессу подвержены практически все элементы конденсатно-питательного и парового трактов турбоустановок АЭС и ТЭС. Другие виды износа металла в большинстве случаев протекают совместно с этим процессом, как показано в научных трудах [1][2][3][4][5]. Сосуды давления и трубопроводные системы ядерных энергетических установок относятся к категории критически важных элементов, в значительной степени определяющих их ресурс, надежность, живучесть и безопасность эксплуатации.…”

Section: Introductionunclassified

The research of the stress-strain state with local thinning in pipelines and determination of allowable values of concentration stress and strain

Kuzmin

Александрович²,

Andreenkova

et al. 2019

Struct. Mech. of Eng. Const. and Build

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Relevance. The nuclear power plant contains a large number of equipment and pipelines subject to flow acceleration corrosion. As a result of a combination of various parameters - sizes (diameters, wall thickness), operational parameters (internal pressure, temperature), steels and elements types - the number of design cases is tens of thousands, without counting the possible forms of thinning. The process of maintenance and repair at the stations are doing an assessment of the accordance of actual and allowable values of wall thicknesses. The ensuring safe operations of equipment and pipelines have been introduced correction functions for regulatory functions, taking into account the forms of thinning, to determine the permissible thinning. The aim of the work. The task is to determine the influence of the forms and types of thinning on the stress-strain state and to determine the most critical thinning for straight sections of pipelines subject to flow acceleration corrosion taking into account emergency conditions. Methods. The allowable values of stress concentration factors (deformations) of pipelines subject without flow acceleration corrosion was determined taking into account allowable values, the requirements of the federal norms and rules for emergency operating conditions. For researches of the stress concentration coefficients were used the finite element method and analytical methods for various shapes, sizes and depths of thinning. Results. A method has been developed, that allows getting the maximum allowable values of stress concentration factors (deformations) for emergency operation, which afford to determine the maximum allowable depth of thinning in emergency conditions - an above criterion. The researches have been carried out definition of the stress concentration factors for local thinning with various types of these thinning. The functions of concentration coefficients depending on the geometric parameters of local thinning wall thickness were determined for a straight section of the pipeline. As a result of the research, the dependences of the sizes of thinning on the concentration coefficients for straight pipelines were created and a master-curve was obtained. The researches were carried out take into account the load from internal pressure and bending moment.

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The WGC-2005 World Geothermal Congress

Cited by 7 publications

References 2 publications

Thermal stability of film forming amines‐based corrosion inhibitors in high temperature power plant water solutions

Thermal stability of film forming amines‐based corrosion inhibitors in high temperature power plant water solutions

Use of low potencial wastewater heat

The research of the stress-strain state with local thinning in pipelines and determination of allowable values of concentration stress and strain

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