HEAT-AND-POWER ENGINEERING FUNDAMENTALS
D.V.Ananyev, G.R. Halitova
THE HEAT TRANSFER INTENSIFICATION IN LAMINAR FLOW OF A HIGHLY PARAFFINIC OIL IN A ROUND TUBE // Transactions of Academenergo. -2014. -N 2. –P. 7-16.
e-mail: Dima211083@yandex.ru
Research Center for Power Engineering Problems of the Russian Academy of Sciences
Keywords : intensification, heat transfer, round tube, discrete roughness, non-Newtonian fluid, laminar flow, oil, the cross annular knurl.
Abstract
In work the results of a numerical study of heat transfer and hydrodynamics in laminar flow of non-Newtonian fluid in a round tube with a transverse annular knurled as semi projections on the inner surface of the pipe wall is presents. As a non-Newtonian fluid a highly paraffinic oil with pseudoplastic properties of the Mamurinsk oil field well number 7 is studied. In work standard error of the method does not exceed 8 %. The geometry of discrete roughness, which provides the best heat transfer intensification of a highly paraffinic oil flow is found. The energy efficiency of transverse annular rolling significantly higher for the non-Newtonian fluid than for a Newtonian is determined.
Yu.A. Kirsanov
FAST THERMAL CONDUCTIVITY IN FLOWING STREAM // Transactions of Academenergo. -2014. -N 2. –P. 17-32.
e-mail: kirsanov-yury@mail.ru
Research Center for Power Engineering Problems of the Russian Academy of Sciences
Keywords : hyperbolic heat conduction, model, the oscillatory wave thermal processes.
Abstract
The literature data on the hyperbolic equation of thermal conductivity in flowing stream is analyzed. Proposed integro-differential equation of thermal conductivity of an incompressible flow the environment for short-term thermal processes. Examples of numerical calculation of boundary-value problem for parallel plates stream shows the adequacy of mathematical thermal model by proposed integro-differential equation to modern physical notions of thermal processes. Is identified the conditions under which the thermal oscillatory wave may be in the stream.
I.A. Yatcenko, R.S Gareev, A.N. Sabirzyanov, V.A. Fafurin, V.B. Yavkin
EXEPERIMENTAL INVESTIGATIONS OF END-HOLED CONSTRICTION DEVICES // Transactions of Academenergo. -2014. -N 2. –P. 33-42.
e-mail: office@ooostp.ru , ANSabirzyanov@kai.ru , vd.yavkin@gmail.com
Kazan National Research Technical University
Keywords: gas flowrate, end-holed nozzle, end-holed orifice, mass flowrate standard, discharge coefficient, Reynolds number, measurement, uncertainty.
Abstract
Article describes the results of experimental investigations of discharge coefficient of end-holed constriction devices (nozzle and orifice) without upstream section. Experiments have been held on a national standard of mass flow rate at Federal State Unitary Enterprise “All-Russian Research Institute of Flow Metering”. As a result a dependence of discharge coefficient of end-holed nozzle and orifice on Reynolds number and relative diameter has been acquired. The empiric equation for the discharge coefficient of end-holed orifice has been clarified.
POWER GENERATION STATIONS
V.V. Nedavniy, A.S. Laskin
USE OF CYLINDERS INCREASED FLOW CAPACITY FOR high power STEAM TURBINES // Transactions of Academenergo. -2014. -N 2. –P. 43-52.
e-mail: Nedavniy_VV@lmz.power-m.ru , ener-mash-nv@mail.ru
Saint Petersburg State Polytechnical University. OJSC «Power Machines»
Keywords: nuclear power station,steam turbine, low-pressure cylinder, a bunk stage, Bauman’s stage.
Abstract
Actual problem in the area of steam turbines for nuclear power plants is the creation of turbine unit capacity of over 1,200 MW, with an efficiency of above 37% unit and the specific metal content of less than 2,4 tons/MWh. Reducing the size of the existing turbine set, keeping the overall efficiency unit lead to the creation competitive power plant. The basic reserve of reducing the number of LPC flows and increasing the unit capacity of the cylinder can serve to further increase summary area of the end “exhausts”. Increasing the steam load and the area “exhaust” LPC at a fixed speed turbine and conditionally “limiting” length of the last stages blades, achieved by using of bunk last stages in LPC. In the above stages first part of the flow goes through the lower tier, and the last stage, and second part of it is expanded in the upper tier to the condenser pressure. Such stages allows to reduce number of LPC in the existing turbine unit and their metal content, as well as create a turbine with increased bandwidth for the future turbines with 1600-1800 MW capacity. Therefore development and researching of bunk stages and low-pressure cylinder with increased bandwidth is relevant and practically important task, designed to improve technical and economic parameters, saving work and material resources in manufacturing turbines. The report shows an analysis the spectra and the application of bunk stages identify the most promising.
One of the most preferable options using a LPC sesquialteral turbine exhaust is NPP in depth vacuum conditions, a cooling water temperature 5-10 ° C. This saves (with minimal changes) heat scheme turbine set and its arrangement. LPC well as perspective options with sesquialteral exhaust are:
– NPP turbines for vacuum decay with two LPC (instead of three);
– development of full-speed high capacity turbine NPP to 1800 MW;
– at designing of turbine thermal power plants and steam turbines for combined cycle .
V.A. Khrustalev * , D.O. Bashlikov ** , A.S. Lyapin ***
COMBINED ENERGY COMPLEKS BASED OF NPP AND GTP WITH RESERVE STARTING BOILER AS WASTE HEAT RCOVERY BOILER // Transactions of Academenergo. -2014. -N 2. –P. 53-59.
e-mail: khroustalevva@mail.ru , dmitry1238@yandex.ru
* Saratov Scientific Center of the Russian Academy of Sciences .
** Saratov State Technical University named after Gagarin Y. A.
*** Balakovo NPP
Keywords : gas turbine, energy complex, reserve boiler, adjusting range, satellite turbine, maneuverability, capacity factor, afterburning device, gas-vapor heat exchanger, gas-water heat exchanger, air condenser.
Abstract
Analyzed technical characteristics of reserve starting boilers of a number Russian NPP. The possibility of their use as waste heat boilers in energy complex based NPP and GTP, or for autonomous generation of steam and power facilities to improve the maneuverability characteristics, as well as to increase the power steam turbines NPP. Composed and calculated thermal scheme of energy complex on the basis of NPP with WWER-SCPI and GTP using reserve starting boiler as the recovery boiler. The technique of the comparative effectiveness of energy complex on the basis of nuclear power plants and gas turbines. Reviewed and compared four characteristic mode of energy complex from efficiency, value weighted average capacity factor and the adjustment range.
N.D. Chichirova, N.G.Shagiyev, Yu.V.Abasev, A.S.Makarov
BINARY WASHOUT COMPOSITIONS FOR REMOVAL OF IRON OXIDE DEPOSITS FROM SURFACES OF THE HEAT POWER EQUIPMENT // Transactions of Academenergo. -2014. -N 2. –P. 60-67.
e-mail: kgeu.tes@mail.ru
Kazan State Power Engineering University
Keywords : chemical cleanings of the heat power equipment, complexons, organic acids, monosolutions of washing reagents, binary washout compositions, iron oxide deposits, thermodynamic balances.
Abstract
Results of binary washout solutions using for carrying out chemical cleanings of the heat power equipment are given. There are shown the expediency of a combination in washing compositions of komplexing reagents belonging to various classes of organic substances. The calculating and experimental properties of binary trilone B and OEDPh compositions for removal of iron oxide deposits from surfaces of power equipment are given. The steel-20 corrosion speeds in trilone B, OEDPh and lemon acid washout solutions is carried out.
ECONOMICS, ECOLOGY, INNOVATIVE TECHNOLOGIES AND PROCESSES IN POWER ENGINEERING
R.Z.Aminov, A.F.Shkret
EVALUATION OF THE POSSIBLE EFFECT OF THE ALIGNMENT CHARTS ELECTRICITY TARIFF DIFFERENTIATION // Transactions of Academenergo. -2014. -N 2. –P. 68-78.
e-mail: oepran@inbox.ru
Department of energy problem of the SSC of the RAS
Keywords : differentiated rates , power consumption , system efficiency, in the off-peak electricity , capital investment, operating costs.
Abstract
The analysis of possible effects in the energy and power plants in the alignment of daily schedules of electricity. The formulas and the estimated cost savings by reducing the energy system: the power consumption at the maximum load, losses in electric networks of the alignment of the load curve, fuel stations grid through better equipment utilization, cost of repairs of equipment of power plants in the transition work units from AC mode to the base. Found that most of the effect falls on the possibility of reducing the installed capacity due to the reduction of the maximum load power system. The greatest effect in the energy transfer takes place at a power consumption of the base area during off-peak. Economic evaluation performed investment limit consumer by changing its schedules electricity through differentiated tariffs.
A.N. Bairamov
TECHNICAL AND ECONOMIC ASPECTS OF UNDERGROUND PLACEMENT OF STORAGE TANKS OF HYDROGEN AND OXYGEN IN THE COMPOSITION OF THE ENERGY COMPLEX WITH HYDROGEN FUEL // Transactions of Academenergo. -2014. -N 2. –P. 79-86.
e-mail: oepran@inbox.ru
Federal State Budget Institution Saratov Scientific Center of RAS
Keywords: safety, energy complex with hydrogen fuel, system storage of hydrogen and oxygen , underground location
Abstract
Aim is to develop and justification of the underground arrangement of the storage tanks of hydrogen and oxygen in the composition of energy complex with hydrogen fuel and estimate the specific investment per unit mass of the stored hydrogen and oxygen. It is based on the theory and methods of construction of underground structures, the principles of explosion protection. Analyzed the conditions of explosion explosive mixture of hydrogen and safety of hydrogen fuel. A developed scheme of arrangement of underground storage system of hydrogen and oxygen in the composition of the energy complex with hydrogen fuel. The estimations of the specific capital investments in the storage of hydrogen and oxygen, including the underground location.
V.N. Kovalnogov, Yu.E. Chamchiyan
SYSTEM ANALYSIS, SIMULATION AND RESEARCH THE EFFECTIVENESS OF CLIMATE ENSURE ENERGY SYSTEMS IN BUILDING // Transactions of Academenergo. -2014. -N 2. –P. 87-95.
e-mail: kvn@ulstu.ru , y.chamchiyan@ulstu.ru
Ulyanovsk State Technical University
Keywords : modeling, system analysis, climate, energy system, heat-mass transfer, efficiency
Abstract
Considered a range of issues related to the modeling, system analysis, research and development of efficient energy systems provide a microclimate of buildings with windows superior tightness. The results of simulation studies and modes of heat and ventilation in a building with windows superior tightness obtained using the original mathematical apparatus and software. It is shown that the real heat savings afforded by the introduction of windows superior tightness, reduced due to latent heat loss associated with the growth of the ventilation load to ensure a comfortable microclimate. The conditions and the way to the fullest realization of the technical and economic advantages of using windows superior tightness are presented.
