Results 21 to 30 of about 2,662 (201)

Optimized design on the thermohydraulic performance of the helical coil heat exchanger

International Journal of Thermofluids, 2023
The helical coil heat exchanger (HCHX) is one of the most popular heat transfer devices in heat pump water heaters. In this study, the Computational Fluid Dynamics (CFD) software, ANSYS FLUENT, was employed to predict the thermohydraulic performance of ...
Yang-Cheng Shih, Yen-Chen Lee, Kuan-Chun Lin   +2 more
doaj   +1 more source

Impact of variable porosity models on the safety of high temperature pebble bed gas-cooled reactors

Brazilian Journal of Radiation Sciences, 2021
The Very High Temperature Reactor (VHTR) is one of the candidates of next generation of the nuclear reactors according to IAEA. Predicting the thermohydraulic behavior of High Temperature Reactors (HTR) is an important contribution to the development of ...
ABEL GÁMEZ RODRÍGUEZ, Leorlen Y Rojas Mazaira, Daniel Milian Perez, Dany Sanchez Dominguez, Carlos Rafael García Hernández, Carlos Alberto Brayner de Oliveira Lira   +5 more
doaj   +1 more source

Heat Transfer Slot Matrix for Compact Rotary Heat Exchangers with Ultra-High Regeneration Ratio for Microturbines [PDF]

Problems of the Regional Energetics, 2023
This paper considers the problem of the influence of distancing elements in slot matrix channels on the thermohydraulic characteristics of the matrix of a rotary heat exchanger having various values of the height of the slot channels. The following tasks
Kostyukov A. V., Kosach L. A.
doaj   +1 more source

Thermohydraulic code coupling for steam generators

This report presents the work carried out during a six-month internship at Framatome’s DTIMGFH section, focused on the thermohydraulic coupling of two simulation codes for modeling steam generator behavior. The objective was to enhance and automate the coupling between STAR-CCM+, a CFD-based software, and GENEPI+, a 3D two-phase thermal-hydraulic code ...
Pereyron, Edgar
core   +3 more sources

Investigation of the small break conditions in the primary circuit of a VVER-1000 reactor [PDF]

Nuclear Energy and Technology, 2019
Modes with violation of the reactor plant cooling conditions on the primary circuit side of a VVER reactor were simulated using the TRAC-PD2 and Open FOAM thermohydraulic codes (TRAC-PD2 1981, OpenFOAM User Guide Version 1.6.
Vladimir I. Belozerov, Mikhail M. Zhuk, Anna M. Terekhova   +2 more
doaj   +3 more sources

Effect of Novel Stepped Airfoil Fin Inserts on Heat Transfer Enhancement and Fluid Flow Characteristics of Printed Circuit Heat Exchanger [PDF]

Journal of Applied Fluid Mechanics
In recent years, researchers have shown considerable interest in supercritical carbon dioxide (sCO₂) Brayton cycle-based power plants due to their unique characteristics and higher efficiency compared with conventional Rankine cycle systems.
A. P. Raji, S. Ranganathan, B. S. Arputharaj, V. Raja   +3 more
doaj   +1 more source

Enhanced forced convection heat transfer of a heat exchanger tube utilizing serrated-ring turbulators

Case Studies in Thermal Engineering, 2021
Experiments were performed to study the thermohydraulic behaviors of heating tubes equipped with serrated-ring bundles as turbulators. Their thermohydraulic characteristics are reported in terms of Nusselt numbers (Nu) and friction factors (f) as well as
M. Pimsarn, P. Samruaisin, P. Eiamsa-ard, N. Koolnapadol, P. Promthaisong, S. Eiamsa-ard   +5 more
doaj   +1 more source

Experimental research on the thermal method of drilling by melting the well in ice mass with simultaneous controlled expansion of its diameter

Записки Горного института, 2022
During the seasonal work of the 64th Russian Antarctic Expedition in 2018-2019 at the “Vostok” drilling facility named after B.B.Kudryashov (“Vostok” station, Antarctic) specialists of Saint Petersburg Mining University conducted experimental ...
Danil V. Serbin, Andrey N. Dmitriev
doaj   +1 more source

Mapping the Thermohydraulic Performance of Turbulence Promoters

Chemical Engineering Transactions, 2022
As a result of the wide use of tubular heat exchangers in industry and considering the main heat transfer and friction limitations they possess compared to new technologies, heat transfer promoters of different shapes have appeared in recent years to improve their thermohydraulic performance.
Duran-Plazas Leidy Paola, Picon-Nunez Martin, Minchaca-Mojica Jesus lsaac   +2 more
openaire   +2 more sources

Development of a 3D thermohydraulic-neutronic coupling model for accident analysis in research miniature neutron source reactor (MNSR)

Nuclear Engineering and Technology, 2019
To accurately analyze the accidents in nuclear reactors, a thermohydraulic-neutronic coupling calculation is required to solve fluid dynamics and nuclear reactor kinetics equations in fine cells simultaneously and evaluate the local effects of neutronic ...
M. Ahmadi, A. Rabiee, A. Pirouzmand
doaj   +1 more source