This article discusses the principles of developing technologies for processing new materials, different processing methods, their advantages and disadvantages.
Posts in category RES. 2016. Issue 3
Shkulova N. V., Ivanova E. S., Guseinov Y. S.Method of improving the efficiency of the heat exchange equipment of the hot water boiler ТВГ-8М on terms of the long life service
The processes of incrustation are caused by huge amounts of dissolved salts in the heat medium. When being exploited the evaporation of the heat medium leads to the ion concentration in it and reaches its satiation. Further increase of the ion concentration leads to scaling. Heated shielding pipes are subjected to scaling more than any other elements of the heat generator.
Scaling makes the exploitation of the heat boiler more difficult and leads to some negative effects: valve exchange piping is reduced, heating area is overheated, fuel consumption is increased, fan efficiency is reduced, service life of the system is decreased, extra restorations grow in number, and consequently restoration and service
costs are increased.
There are two main methods of descaling: chemical and non-chemical. When the chemical method is applied acid solvents are used for descaling. The nonchemical method is introduced in RD 153-34.1-37.410-00 and it is composed of magnetic, mechanical, hydromechanical, electrohydropulsed and ultrasonic methods.
The non-chemical ultrasonic method of descaling is the most preferable in ecological and economic aspects as it makes it possible to carry out descaling when the heat generating equipment is being exploited without switching it off. This method is widely used in power systems, but it can’t be applied in heat generators with the complicated geometry of shielding pipes.
The ultrasonic method based on acoustic cavitation is the most effective one, because without having close contact with the descaled surface the intensity of ultrasonic field in the liquid is distributed evenly thus making it possible to descale the surfaces with the complicated geometry.
The use of ultrasonic cavitation method in the boilers TVG-8M is considered in this abstract. The acoustic converters (D) connected with the external piping of the heat generator are offered to use. The ultrasonic cavitation method and the scheme of connection of acoustic converters to the external piping of the boiler TVG-8M allow to distribute the cavitation field of descaling in the calorific surface of shielding pipes to its limit and the special design of the node of connection makes it possible to eliminate negative effects of ultrasonic alternating fluctuations to the walls of the pipes of the heat exchanger.
The technological process of descaling of the heat exchanging surfaces of TVG-8M can be carried out in the exploitation as well as in the off-preventive modes.
Applying the acoustic cavitation method of descaling in the internal surface of the heat exchange in the boilers TVG-8M makes it possible to keep the design sizes of the heat generator at the adjusted hydraulic parameters during the whole life service and to make fuel consumption effective due to the lack of scaling on the surfaces of the heat exchange thus providing trouble-free operation of the heat generator.
This article is about actual problem of unsatisfactory work of system of heating of cycle air on GPA-32 Ladoga compressor unit on CS-48: there were emergency stops, caused by insufficient heating of inlet air of axial compressor. Offering solutions in this article are:
1) changing the design of complex air-cleaning device. There is analysis of current design, calculations of parameters of air flow and estimation of processes according to aerodynamics;
2) justification of creation of anti-icing system, based on the principle of infrared heating. To do this the mathematical model GTU GPA-32 was written in Mathcad 15 in the form of the system of linear equations (verification of the results of the calculations and technical specifications was also completed). The influence of heating of air on the operating parameters of the gas turbine in case of increasing heating power assesses on the basis of the mathematic model. According to the analysis of the results, conclusion is made about the optimality of the infrared de-icing system because it requires neither any direct air heating, no consumption of compressed air from the axial compressor of the gas turbine, so it is economically effective.
Proposed impregnation technique with liquid glass of fine-grained concrete for the manufacture of thin-walled reinforced concrete structures in the Arctic zone. The effectiveness of the method is confirmed experimentally: significant increase of physical-mechanical properties – compressive strength, frost resistance, etc. Application of the method in the Arctic zone will increase the longevity of constructed buildings and structures.
Medvedev A. V.Features of the organization of the local (facility) monitoring and groundwater quality control of subsurface facilities of Gazprom OJSC and Gazprom Transgaz Ukhta LLC
The article analyzes the methodology and specifics of conducting local monitoring and qualitative characteristics of extracted groundwater in the system of PJSC “Gazprom” and OOO “Gazprom transgaz Ukhta” as of January 1, 2015 based. On the basis of the analysis appropriate recommendations are given.
This article discusses in detail the concept of restructuring, each of which focuses on a single target, or in certain areas and activities. It offers insight into the restructuring of the enterprise as the type of control and the process involving a change of the quantitative and qualitative composition of the structure of the enterprise as an integrated complex with the aim to better suit the objective function. After studying in the field of modern management theory and practice directions are highlighted the most relevant concepts, which can be used in the restructuring of real enterprises. In general, discussed guidelines of a diagram of the enterprise restructuring process, in which there is quite a tough sequence of the stages of preparation and restructuring.
The paper considers the tax base of the organization, which has a huge impact on the formation of the results of operations of the organization and the size of the profit remaining at the disposal of the organization. Tax burden of the organization that applies the simplified system of taxation, with the object income, is calculated. On the basis of the analysis was set with a priority position tax management tax system and the efficiency of the transition to other systems of taxation.
The main reasons of lost circulation which is one of the most frequently and expensive troubles at well construction are depicted in the article. Methods and procedures of prevention and elimination of lost circulation are presented, experience of lost circulation control is analysed. It is specified that traditional procedures for lost circulation control are ineffective, mudding is the most effective and advanced procedure.
Isaev A. A., Malykhin V. I., Sharifullin A. A., Borodin N. A., Afanasyeva L. A., Khasanov L. R.Development of means for catching the suspended solids in extracted fluid
Decrease of service life of pumping rods was determined as the viscosity of extracted fluid is growing. Analysis of repairs of Cavity Pumping Units was performed. Means with a proven efficiency for catching the suspended solids in extracted fluid – a tail pipe, a slurry trap and a gas-sand anchor have been developed. Fluids with various viscosities were obtained for determining the sedimentation rate of solids.
The article made the analysis of the existing methodology for the design of pile foundations, its correspondence to the experimental data and introduced a new approach to the design of pile foundations for ultimate limit state based on the author’s model piles and pile foundation.
Summarized the reasons for the violation of the dynamic stability of the drill string in the drilling process. The conditions for vibration-free running of the drill string. It is shown experimentally that oscillatory processes in the electrical drive–drill string adequately describes the two-mass model, which allows the development of the structure of electromechanical systems effectively damping oscillations of the drill string due to the capabilities of the drive.
In the article value and strong contribution of the oil industry to the budget of the country is characterized, dynamics of revenues of the budget of Russia for the cast 5 years is reflected, changes in collection of a tax on mining are reflected, calculation of tax burden of the largest oil companies is made, the perspective directions of improvement of the operating system of the taxation on the example of the large vertically integrated oil company are revealed.
Andrukhov V. A.Assessment of the quality of working life as a method of revealing of reserves of increase of labour productivity in gas transportation enterprises
The article presents the basic concepts and components of quality of working life of the organization, the basic group of parameters, the possibility of increase of efficiency of work of the gas transportation organization based on the assessment of the quality of working life.