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Information × Registration Number 0212U008371, 0110U001317 , R & D reports Title Investigation of passive evaporative condensing heat transfer systems to improve the safe operation of nuclear power equipment. popup.stage_title Head Nikolaenko Yuri Egorovich, Registration Date 21-11-2012 Organization Faculty of аircraft and space systems NTUU "KPI" popup.description2 Object of research - passive systems of cooling, heatsink and thermal protection of evaporating-condensing type. The aim - to create a scientific base of development and implementation of highly effective passive heat transfer systems, heatsink and thermal protection to improve the reliability and safety of nuclear power equipment functioning. Research methods - the analysis of the existing status on the subject work, theoretical and experimental study of characteristics of processes in considered systems, carrying out optimization of characteristics of systems, development of main scientific and technological solutions on their creation. As a result of detection, research and analysis of several thermal factors limiting heat transfer ability of evaporating-condensing type's systems, regularities and dependencies defining values of the maximum heat fluxes as functions of design parameters, regime characteristics of processes, thermophysical properties of the heat-exchanging environments and intermediate heat carrier are received. Researched and analyzed methods of improving of heat-transport ability of evaporating-condensing systems, based on the creation of effective capillary-arterial system and separation of channels for passing of flows of steam and condensate. The problem of optimization of parameters of capillary structure heat transfer element of evaporating-condensing type from the point of view of minimization of its thermal resistance is delivered and solved. Based on the analysis of regularities of heat transfer processes, dependences for determination of optimal ratio of zone's lengths of evaporation and condensation heat transfer elements of trumpet packet of heat-exchanging system in case of which system has minimal thermal resistance to heat transfer are received. Basic provisions of thermal calculation method of passive systems of heatsink of evaporating-condensing type in relation to characteristic thermal heat transfer schemes are received. The research results of heat-technical characteristics of laboratory and experimental samples of passive systems of heatsink from metal constructions are received. The recommendations about rational constructioning of systems of heatsink, basic schematics solutions of systems and specific technological decisions are developed for support of efficiency and reliability of systems functioning. Scientific production created in this work is a necessary basis for further carrying out of developmental operations, development of the appropriate design and technological documentation on typical constructions of evaporating-condensing type's passive systems with different functional purpose and the organizations of production of such systems. The scientific and technical level of performed work responds international standards. In case of implementation of heat transfer evaporating-condensing systems expected their safe functioning without service and without reservation even in the absence of power leading to improving of weight-dimension indexes, lowering of metal consumption and thus reduction of manufacture and operation expenditures. They also will provide spatial separation of flows of heat-exchanging environments and therefore will exclude hit of radioactive materials in environment due to existence in each of heat transfer elements of double barrier between the environments. The results of work will be used by project, design and industrial organizations and enterprises functioning in nuclear power and as a whole in fuel & energy branch. Product Description popup.authors Гершуні О.Н. Ніщик О.П. popup.nrat_date 2020-04-02 Close