Investigation of a high-forced cooling system for the elements of heat power installations

• Autorzy: Genbach A. A. , Bondartsev D. Y. , Iliev I. K.

Identyfikatory

DOI

10.5604/01.3001.0012.0937

• Języki publikacji: EN

Abstrakty

EN

The studies of the ultimate thermal flows have been carried out in metallic and poorly heat-conducting porous structures, which operate when gravitational and capillary forces act jointly and cool various devices of thermal power plants in order to create a scientific methodology. The mechanism of destruction of metal vaporizing surfaces and poorly heat-conducting coatings of low porosity made of natural mineral media (granite) has been described on the basis of the problem of thermoelasticity and experimental data. Thermal flow dependences on time of their action and depth of penetration of temperature perturbations were identified based on analogy. Capillary-porous systems have high intensity, heat transport ability, reliability, compactness. The results of calculations and experiment showed that the maximum thickness of the particles that detach under the influence of compression forces for granite coatings is (0.25÷0.3).10^-2 m. Sections of compression curves that determine the detachment of particles with dimensions of more than 0.3×10^-2 m for large thermal flows and short feed times, are screened by the melting curve, and in the case of small thermal flows and time intervals – the expansion curve.

Słowa kluczowe

EN

heat transfer control; capillary-porous coatings; natural mineral media; heat-transfer crisis; capillary-porous system; thermal power plant

• Wydawca: Wydawnictwo Wrocławskiej Rady FSNT NOT
• Czasopismo: Journal of Machine Engineering
• Rocznik: 2018
• Tom: Vol. 18, No. 2
• Strony: 106--117
• Opis fizyczny: Bibliogr. 17 poz., rys.

Twórcy

autor

Genbach A. A.

• Almaty University of Power Engineering and Telecommunications, Department of Heat Engineering Installations, Almaty, Kazakhstan

autor

Bondartsev D. Y.

• Almaty University of Power Engineering and Telecommunications, Department of Heat Engineering Installations, Almaty, Kazakhstan

autor

Iliev I. K.

• University of Ruse, Department of Thermotechnics, Hydraulics and Ecology, Ruse, Bulgaria

Bibliografia

• [1] POLYAEV V.M., GENBACH A.A., 1995, Methods of monitoring energy processes, experimental thermal and fluid science, International of Thermodynamics, Experimental Heat Transfer and Fluid Mechanics, Avenue of the Americas, New York, USA, 10, 273-286.
• [2] POLYAEV V.M. GENBACH A.A., 1991, A limit condition of a surface at thermal influence, Teplofizika Vysokikh Temperatur, 29, 923-934, (in Russian).
• [3] GENBACH A.A., JAMANKYLOVA N.O., BAKIC VUKMAN V., 2017, The processes of Vaporization in the Porous Structures Working with the Excess of Liquid, Thermal Science, 1, 21, 363-373.
• [4] GENBACH A.A., OLZHABAYEVA K.S., ILIEV I.K., 2016, Boiling process in oil coolers on porous elements, Thermal Science 5, 20, 1777-1789.
• [5] JAMIALAHMADI M., et al., 2008, Experimental and theoretical studies on subcooled flow boiling of pure liquids and multicomponent mixtures, Intern. J. Heat Mass Transfer, 51, 2482-2493.
• [6] OSE Y., KUNUGI T., 2011, Numerical Study on Subcooled Pool Boiling, Programme in Nuclear Science and Technology, 2, 125-129.
• [7] KREPPER E., et al., 2007, CFD Modeling subcooled boiling-concept, Validation and Application to Fuel Assembly Design, Nuclear Engineering and Design, 7, 716-731.
• [8] OVSYANIK A.V., 2012, Modeling of processes of heat exchange at boiling liquids (in Russian), Gomel State Technical University named after P.O., Sukhoy, Gomel, Belarus.
• [9] ALEKSEIK, O.S., KRAVETS V.Yu., 2013, Physical model of boiling on porous structure in the limited space, Eastern-European Journal of Enterprise Technologies, 64, 4/8, 26-31.
• [10] POLYAEV V.M., MAYOROV V.А., VASILEV L.L., 1998, Hydrodynamics and heat exchange in porous structural elements of aircrafts, Mechanical Engineering, 168, (in Russian).
• [11] KOVALEV S.A., SOLOVEV S.L., 1989, Evaporation and condensation in heat pipes, Science, 112, (in Russian).
• [12] KUPETZ М., JENI HEIEW E., HISS F., 2014, Modernization and extension of the life of steam turbine power plants in Eastern Europe and Russia, Heat power engineering, 6, 35-43, (in Russian).
• [13] GRIN Е.А., 2013, The possibilities of fracture mechanics in relation to the problems of strength, resource and justification for the safe operation of thermal mechanical equipment, Heat Power Engineering, 1, 25-32. (in Russian).
• [14] SHKLOVER E.G., 1991, Experimental study of heat transfer from porous surface in pool and forced – convection boiling at low pressures, Phase Change Heat Transfer ASME, 159, 75-80.
• [15] BARTHAU G., 1992, .Active nucleation site density and pool boiling heat transfer, Int. J. Heat Mass Transfer, 35, 271-278.
• [16] NOVOTNY L., SINDLER J., FIALA S., SVEDA J., 2016, Modelling and Optimization of Machine Tools on Foundations, Journal of Machine Engineering, 16/1, 43-56.
• [17] PERZYNSKI K., et al., 2016, Numerical Evaluation of Gear Ring Behaviour During Various Cooling Conditions, Journal of Machine Engineering, 16/2, 18-26.

Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).