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Wyszukujesz frazę "high temperature reactor" wg kryterium: Temat


Wyświetlanie 1-5 z 5
Tytuł:
Preliminary computational and experimental design studies of the ISHTAR thermostatic rig for the high-temperature reactors materials irradiation
Autorzy:
Talarowska, Anna
Lipka, Maciej
Wojtania, Grzegorz
Powiązania:
https://bibliotekanauki.pl/articles/2055665.pdf
Data publikacji:
2021
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
high-temperature reactor
HTR
irradiation
materials
reactor MARIA
Opis:
The Ir radiation System for High-Temperature Reactors (ISHTAR) thermostatic rig will be used to irradiate advanced core material samples in conditions corresponding to those prevailing in the high-temperature reactors (HTRs): these conditions include a stable temperature extending up to 1000°C in the helium atmosphere. Computational and experimental studies concerning the design have been conducted, proving the possibility of these conditions’ fulfi llment inside the rig while maintaining the safety limits for MARIA research reactor. The outcome is the thermostatic rig design that will be implemented in the MARIA reactor. Appropriate irradiation temperature will be achieved by a combination of electric heating with the control system, gamma heating, and a helium insulation gap with precisely designed thickness. The ISHTAR rig will be placed inside the vertical irradiation channel, which is located in the reactor pool. The device is being developed from scratch at the Nuclear Facilities Operation Department of the National Centre for Nuclear Research as a part of the GOSPOSTRATEG programme
Źródło:
Nukleonika; 2021, 66, 4; 127--132
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thermodynamic analysis of modular high-temperature nuclear reactor coupled with the steam cycle for power generation
Autorzy:
Dudek, Michał
Jaszczur, Marek
Kolenda, Zygmunt
Powiązania:
https://bibliotekanauki.pl/articles/240411.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
modular high-temperature nuclear reactor HTR
rankine cycle
steam turbine
Opis:
Consumption of energy is one of the important indicators in developing countries, but a lot of companies from the energy sector have to cope with three key challenges, namely how to reduce their impact on the environment, how to ensure the low cost of the energy production and how to improve the system overall performance? For Polish energy market, the number of challenges is greater. The growing demand for electricity and contemporary development of nuclear power technology allow today’s design, implement new solutions for high energy conversion system low unit cost for energy and fuel production. In the present paper, numerical analysis of modular high-temperature nuclear reactor coupled with the steam cycle for electricity production has been presented. The analysed system consists of three independent cycles. The first two are high-temperature nuclear reactor cycles which are equipped with two high-temperature nuclear reactors, heat exchangers, blowers, steam generators. The third cycle is a Rankine cycle which is equipped with up to four steam turbines, that operate in the heat recovery system. The analysis of such a system shows that is possible to achieve significantly greater efficiency than offered by traditional nuclear reactor technology.
Źródło:
Archives of Thermodynamics; 2019, 40, 4; 49-66
1231-0956
2083-6023
Pojawia się w:
Archives of Thermodynamics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Lab-scale simulation of coal-nuclear synergy. Utilization of high temperature reactor excess heat in synthesis gas and hydrogen-rich gas production
Badania symulacyjne synergii węglowo-jądrowej. Zastosowanie ciepła nadmiarowego z reaktora HTR w procesie zgazowania węgla do gazu syntezowego i gazu bogatego w wodór
Autorzy:
Smoliński, A
Powiązania:
https://bibliotekanauki.pl/articles/282901.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Instytut Gospodarki Surowcami Mineralnymi i Energią PAN
Tematy:
High Temperature Reactor
HTR
coal gasification
excess heat
synthesis gas
hydrogen
wysokotemperaturowy reaktor jądrowy
zgazowanie węgla
ciepło nadmiarowe
gaz syntezowy
wodór
Opis:
The paper presents the results of the experimental study on simulated application of High Temperature Reactor (HTR) excess heat in the allothermal coal gasification to synthesis gas and hydrogen-rich gas. The effects of application of gasification agents pre-heating was tested in a laboratory scale fixed bed reactor installation. The installation was equipped with a specially designed auxiliary pre-heating system for gasification agents applied (air, oxygen or steam), simulating the utilization of the HTR excess heat. The results of the study proved the feasibility of the utilization of the external excess heat in air and steam coal gasification.
W artykule przedstawiono wyniki badań symulacyjnych zastosowania ciepła nadmiarowego z wysokotemperaturowego reaktora jądrowego (HTR) w procesie allotermicznego zgazowania węgla do gazu syntezowego i gazu bogatego w wodór. Określono wpływ wstępnego przegrzania czynnika zgazowującego na wyniki procesu zgazowania w laboratoryjnej instalacji z reaktorem ze złożem stałym. Instalacja została wyposażona w specjalnie do tego celu zaprojektowany układ wstępnego przegrzania czynnika zgazowującego (powietrze, tlen lub para wodna), symulujący wykorzystanie ciepła nadmiarowego z reaktora HTR. Wyniki badań potwierdziły możliwość wykorzystania zewnętrznego źródła ciepła nadmiarowego w procesie zgazowania węgla powietrzem i para wodną.
Źródło:
Polityka Energetyczna; 2015, 18, 1; 69-83
1429-6675
Pojawia się w:
Polityka Energetyczna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assesment of advanced step models for steady state Monte Carlo burnup calculations in application to prismatic HTGR
Autorzy:
Kępisty, G.
Cetnar, J.
Powiązania:
https://bibliotekanauki.pl/articles/146581.pdf
Data publikacji:
2015
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
burnup
high temperature gas-cooled reactor (HTGR)
Monte Carlo
stability
step model
Opis:
In this paper, we compare the methodology of different time-step models in the context of Monte Carlo burnup calculations for nuclear reactors. We discuss the differences between staircase step model, slope model, bridge scheme and stochastic implicit Euler method proposed in literature. We focus on the spatial stability of depletion procedure and put additional emphasis on the problem of normalization of neutron source strength. Considered methodology has been implemented in our continuous energy Monte Carlo burnup code (MCB5). The burnup simulations have been performed using the simplified high temperature gas-cooled reactor (HTGR) system with and without modeling of control rod withdrawal. Useful conclusions have been formulated on the basis of results.
Źródło:
Nukleonika; 2015, 60, No. 3, part 2; 523-529
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thermal analysis of heat and power plant with high temperature reactor and intermediate steam cycle
Autorzy:
Fic, A.
Składzień, J.
Gabriel, M.
Powiązania:
https://bibliotekanauki.pl/articles/239939.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
cogeneration system
high-temperature reactor
exergy analysis
gas heat pumps
numerical simulation
system kogeneracyjny
reaktor wysokotemperaturowy
analiza egzergii
gazowe pompy ciepła
symulacja numeryczna
Opis:
Thermal analysis of a heat and power plant with a high temperature gas cooled nuclear reactor is presented. The main aim of the considered system is to supply a technological process with the heat at suitably high temperature level. The considered unit is also used to produce electricity. The high temperature helium cooled nuclear reactor is the primary heat source in the system, which consists of: the reactor cooling cycle, the steam cycle and the gas heat pump cycle. Helium used as a carrier in the first cycle (classic Brayton cycle), which includes the reactor, delivers heat in a steam generator to produce superheated steam with required parameters of the intermediate cycle. The intermediate cycle is provided to transport energy from the reactor installation to the process installation requiring a high temperature heat. The distance between reactor and the process installation is assumed short and negligable, or alternatively equal to 1 km in the analysis. The system is also equipped with a high temperature argon heat pump to obtain the temperature level of a heat carrier required by a high temperature process. Thus, the steam of the intermediate cycle supplies a lower heat exchanger of the heat pump, a process heat exchanger at the medium temperature level and a classical steam turbine system (Rankine cycle). The main purpose of the research was to evaluate the effectiveness of the system considered and to assess whether such a three cycle cogeneration system is reasonable. Multivariant calculations have been carried out employing the developed mathematical model. The results have been presented in a form of the energy efficiency and exergy efficiency of the system as a function of the temperature drop in the high temperature process heat exchanger and the reactor pressure.
Źródło:
Archives of Thermodynamics; 2015, 36, 1; 3-18
1231-0956
2083-6023
Pojawia się w:
Archives of Thermodynamics
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-5 z 5

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