scholarly journals NATURAL TESTS OF THE EXPERIMENTAL SAMPLE OF THE THERMOELECTRIC SYSTEM, BASED ON JOINT USE OF HIGH-CURRENT THERMOELECTRIC BATTERIES AND ALL-METAL THERMAL CONDUCTORS

2019 ◽  
Vol 45 (3) ◽  
pp. 68-75
Author(s):  
D. V. Evdulov ◽  
T. A. Ismailov ◽  
R. Sh. Kazumov ◽  
T. E. Sarkarov
Keyword(s):  
Power Plants ◽  
Thermal Power ◽  
Experimental Studies ◽  
High Heat ◽  
Heat Conducting ◽  
Thermal Power Plants ◽  
Experimental Sample ◽  
High Current ◽  
Temperature Changes ◽  
Combined Use

Objectives. The aim of the article is to develop and study a thermoelectric system based on the combined use of high-current thermoelectric batteries and heat pipelines made of high-heatconducting material (e.g. copper or aluminum), to conduct full-scale experimental studies of the experimental sample of thermal power plants.Method. The design of the device of the experimental stand of the prototype on the basis of the combined use of high-current thermoelectric batteries and heat pipelines made of high-heat-conducting material is presented. The technique of full-scale tests of the prototype on a specially created laboratory bench to confirm the adequacy of the results of thermal power plants.Result. Temperature changes in different points of thermal power plants at fixed and different supply currents, temperature changes at the end of the heat pipeline in time at different supply currents of thermal power plants are investigated. The comparison of experimental and calculated data of the prototype is carried out.Conclusion. The results of experimental studies have shown the effectiveness of the developed thermoelectric system for remote separation of the cold source and the cooling object. It is shown that it is possible to increase the efficiency of thermal power plants with the combined use of high-current batteries and heat pipelines made of high-heat-conducting material.

RESEARCH OF COMPLEX MODIFICATION OF HEAVY CONCRETE

2021 ◽  
Vol 96 (4) ◽  
pp. 107-112
Author(s):  
YU.S. FILIMONOVA ◽  
◽  
E.G. VELICHKO ◽  
Keyword(s):  
Compressive Strength ◽  
Fly Ash ◽  
Power Plants ◽  
High Efficiency ◽  
Thermal Power ◽  
Thermal Power Plants ◽  
Complex Chemical ◽  
Composition And Structure ◽  
Combined Use ◽  
Mineral Additive

Modification of the composition and structure of heavy concrete with the use of a complex chemical-mineral additive consisting of fly ash from thermal power plants, a superplasticizer, a high-valence hardening accelerator AC and a fine-dispersed clinker component is considered. Modified concrete is characterized by an increase in compressive strength at a brand age by 67%, a decrease in the water content of a concrete mixture by 13.6% and an improvement in its workability by 11-12 cm. With the combined use of a superplasticizer and a high-valence hardening accelerator AC a significant synergistic effect is observed in the format of enhancing their plasticizing effect. The high efficiency of the application of the mixed-dispersed clinker component has been established.

Production of Ceramic Brick Based on Aluminum-Silicate Wastes

2016 ◽  
Vol 683 ◽  
pp. 156-161 ◽  
Author(s):  
Viktor A. Vlasov ◽  
Nelli K. Skripnikova ◽  
Ivan Yu. Yuriev ◽  
Pavel V. Kosmachev ◽  
Viktoria A. Litvinova ◽  
...  
Keyword(s):  
Power Plants ◽  
Thermal Power ◽  
Experimental Studies ◽  
Raw Material ◽  
Optimum Operating ◽  
Aluminum Silicate ◽  
Operating Parameters ◽  
Chemical Compositions ◽  
Thermal Power Plants ◽  
Ceramic Brick

The paper focuses on the production of ceramic brick based on aluminum silicate waste generated by thermal power plants. The grain size and chemical compositions of the raw material are investigated. Experimental studies are carried out to identify optimum operating parameters of the ceramic brick production. It is shown that the use of aluminum silicate waste, namely, 40–60 % ash together with clay raw material allows obtaining ceramic brick possessing 20–25 MPa compressive strength, 10–15 % water absorption, and frost resistance of over 60 cycles.

A Joint Research Project to the Control of Rapid Temperature Changes in Industrial Components

2015 ◽  
Author(s):  
Ralf Trieglaff ◽  
Detlef Rieck ◽  
Axel Schulz
Keyword(s):  
Power Plants ◽  
Thermal Power ◽  
Measurement Techniques ◽  
Project Work ◽  
Thermal Power Plants ◽  
Martensitic Steels ◽  
Research Project ◽  
Joint Research ◽  
Temperature Changes ◽  
Joint Research Project

The control of rapid and numerous temperature changes is an urgent requirement in many industrial processes, particularly for thermal power plants in flexible operation. The paper describes objectives, partners and methodical approaches of the ongoing German research project THERRI. The project scope is to establish essential Fracture Mechanics basics for an industrial application of a Damage Tolerance concept to thick-walled components of thermal power plants. One key issue of the stipulated works is to provide an experimental data base for fatigue crack propagation in high-temperature ferritic-martensitic steels in the relevant temperature range from 300°C to 600°C. This will be supplemented by simulation calculations (XFEM) and the further development of ultrasonic measurement techniques. The research project has been started but not finished yet. Therefore this paper is a snapshot of the ongoing project work and shows — besides the methodological work — first but not final results.

On the prospect of introduction of plasma ignition in power boilers

2019 ◽  
Vol 12 (1) ◽  
pp. 22-28
Author(s):  
V. Ye. Mikhailov ◽  
S. P. Kolpakov ◽  
L. A. Khomenok ◽  
N. S. Shestakov
Keyword(s):  
Russian Federation ◽  
Solid Fuel ◽  
Power Plants ◽  
Thermal Power ◽  
Fuel Oil ◽  
Solid Fuels ◽  
Thermal Power Plants ◽  
Plasma Ignition ◽  
The Russian Federation ◽  
Capital Construction

One of the most important issues for modern domestic power industry is the creation and further widespread introduction of solid propellant energy units for super-critical steam parameters with high efficiency (43–46%) and improved environmental parameters. This will significantly reduce the use of natural gas.At the same time, one of the major drawbacks of the operation of pulverized coal power units is the need to use a significant amount of fuel oil during start-up and shutdown of boilers to stabilize the burning of the coal torch in the variable boiler operating modes.In this regard, solid fuel TPPs need to be provided with fuel oil facilities, with all the associated problems to ensure the performance (heating of fuel oil in winter), reliability and safety. All of the above problems increase both the TPP capital construction costs, and the electricity generating cost.A practical solution to the above problems at present is the use of a plasma technology for coal torch ignition based on thermochemical preparation of fuel for combustion. The materials of the developments of JSC “NPO CKTI” on application of plasmatrons in boilers of thermal power plants at metallurgical complexes of the Russian Federation are also considered.Plasma ignition systems for solid fuels in boilers were developed by Russian specialists and were introduced at a number of coal-fi red power plants in the Russian Federation, Mongolia, North Korea, and Kazakhstan. Plasma ignition of solid fuels is widely used in China for almost 30% of power boilers.The introduction of plasma-energy technologies will improve the energy efficiency of domestic solid-fuel thermal power plants and can be widely implemented in the modernization of boilers.During the construction of new TPPs, the construction of fuel oil facilities can be abandoned altogether, which will reduce the capital costs of the construction of thermal power plants, reduce the construction footprint, and increase the TPP safety.

Sign in / Sign up

Export Citation Format

Share Document