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Optimization of thermophysical processes in power equipment of power plants


Presented by the Odessa National Polytechnic University

The authors: Dr.of Sc. Korolyov A.V., Dr.of Sc. Oborskiy G.A., Dr.of Sc. Pismennyy E.N., Dr.of Sc. Kozlov I.L., Cand.of Sc. Gershuni A.N., Cand.of Sc. Nishchik A.P., Cand.of Sc. Razumovskiy V.G.


The goal of the work is to increase the efficiency, reliability and safety of the operation of power plant equipment through in-depth analysis, intensification and optimization of thermophysical processes in it, development and implementation of scientifically sound technical solutions on its improvement.

On the basis of the studies carried out, the physical mechanism of self-organization of two-phase flow transition to its crisis mode has been revealed, the reasons of acoustic phenomena in the case of high-parameters coolant leakage have been identified,the behavior of a two-phase flow through the pipeline sections with local hydraulic resistances have been clarified and the ways of reducing their vibration have been found out, the conditions for the formation of hydrodynamic shocks in the pipeline systems of power equipment caused by an  oscillatory and aperiodic thermohydrodynamic instability have been established, the determining criterion for optimizing effective strategies for power equipment reliability managing has been established.

As a result of complex thermophysical studies of thermal hydraulic processes under supercritical parameters of the coolant in the fuel assemblies of promising nuclear reactors, convective heat transfer processes in developed heat transfer surfaces and heat transfer characteristics of evaporation-and- condensation systems, new regularities of the processes were discovered and analyzed, new methods for intensifying heat transfer were proposed and, on this basis, functional correlations for calculating and optimizing the parameters of  heat transfer systems are determined and the methods of their rational design are developed.

A unique method for determining the conditions on the onset and intensity of a hydrodynamic shock resulted from aperiodic instability during the valves been closing is proposed. An original technical solution to use steam energy for feeding the NPP steam generators under the conditions of its complete blackout is presented.

The results of the performed studies are used in the compulsory normative documents on design of the boilers and convective surfaces, heat recovery units and other heat exchangers of new types that leads to an increase in the energy efficiency of the main equipment, is implemented in original technical solutions on passive heat removal and thermal protection systems to strengthen safety barriers in nuclear power engineering.

The devices, methods, and recommendations developed and implemented at the power plants do not have world analogues.

Number of publications: 707 in all, of which 17 are monographs (5 in foreign publishing houses), 7 textbooks and tutorials, 682 papers (104 in foreign publishing houses), 1 patent. According to the SCOPUS database, the total number of references to the authors' publications is 143, the h-index is 5. According to the Google Scholar database, the total number of references to the authors’ publications is 701, and the h-index is 12. On the topic of the work, 9 doctoral and 30 candidate dissertations are defended.