Hydraulic Characterization of the Full Scale Mock-Up of the DEMO Divertor Outer Vertical Target

In the frame of the pre-conceptual design activities of the DEMO work package DIV-1 “Divertor Cassette Design and Integration” of the EUROfusion program, a mock-up of the divertor outer vertical target (OVT) was built, mainly in order to: (i) demonstrate the technical feasibility of manufacturing procedures; (ii) verify the hydraulic design and its capability to ensure a uniform and proper cooling for the plasma facing units (PFUs) with an acceptable pressure drop; and (iii) experimentally validate the computational fluid-dynamic (CFD) model developed by the University of Palermo. In this context, a research campaign was jointly carried out by the University of Palermo and ENEA to experimentally and theoretically assess the hydraulic performances of the OVT mock-up, paying particular attention to the coolant distribution among the PFUs and the total pressure drop across the inlet and outlet sections of the mock-up. The paper presents the results of the steady-state hydraulic experimental test campaign performed at ENEA Brasimone Research Center as well as the relevant numerical analyses performed at the Department of Engineering at the University of Palermo. The test facility, the experimental apparatus, the test matrix and the experimental results, as well as the theoretical model, its assumptions, and the analyses outcomes are herewith reported and critically discussed.

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Prediction of Fouling and Slagging in Pulverized-Coal Fired Furnaces

Volume 1: Fuels and Combustion, Material Handling, Emissions; Steam Generators; Heat Exchangers and Cooling Systems; Turbines, Generators and Auxiliaries; Plant Operations and Maintenance ◽

10.1115/power2013-98045 ◽

2013 ◽

Author(s):

Ezra Bar-Ziv ◽

Efim Korytnyi ◽

Miron Perelman ◽

Roman Saveliev ◽

Boris Chudnovsky

Keyword(s):

Fly Ash ◽

South African ◽

Fluid Dynamic ◽

Test Facility ◽

Mineral Matter ◽

Ash Deposition ◽

Dynamic Simulations ◽

Good Comparison ◽

Combustion Experiment

The objective of this paper is to develop a method for predicting the fouling dynamics and thermal resistance of a certain coal and its fly ash in a coal-fired utility boiler as well as determine the emissivity of the fly ash in order to optimize soomblowing procedures for fouling clean-up. The methodology comprises combustion experiment in a 50kW test facility, characterization of the coal and its mineral matter and the consequent fly ash as well a series of computational fluid dynamic simulations. Ash deposition from Cerrejon D Colombian and Billiton-Prime South African coals were studied and their behavior predicted in 575MW tangentially-fired and 550MW opposite-wall boilers. Good comparison was obtained between predicted results and actual data from the boilers.

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Preliminary CFD Assessment of an Experimental Test Facility Operating with Heavy Liquid Metals

Science and Technology of Nuclear Installations ◽

10.1155/2017/1949673 ◽

2017 ◽

Vol 2017 ◽

pp. 1-11 ◽

Cited By ~ 2

Author(s):

Matteo Lizzoli ◽

Walter Borreani ◽

Francesco Devia ◽

Guglielmo Lomonaco ◽

Mariano Tarantino

Keyword(s):

Experimental Data ◽

Liquid Metals ◽

Fluid Dynamic ◽

Operating Conditions ◽

Test Facility ◽

Cfd Analysis ◽

Cfd Model ◽

Cfd Simulations ◽

Pressure Drops ◽

Venturi Nozzle

The CFD analysis of a Venturi nozzle operating in LBE (key component of the CIRCE facility, owned by ENEA) is presented in this paper. CIRCE is a facility developed to investigate in detail the fluid-dynamic behavior of ADS and/or LFR reactor plants. The initial CFD simulations have been developed hand in hand with the comparison with experimental data: the test results were used to confirm the reliability of the CFD model, which, in turn, was used to improve the interpretation of the experimental data. The Venturi nozzle is modeled with a 3D CFD code (STAR-CCM+). Later on, the CFD model has been used to assess the performance of the component in conditions different from the ones tested in CIRCE: the performance of the Venturi is presented, in terms of pressure drops, for various operating conditions. Finally, the CFD analysis has been focused on the evaluation of the effects of the injection of an inert gas in the flow of the liquid coolant on the performance of the Venturi nozzle.

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Development of Correlations for Pressure Loss/Drop Coefficients Obtained From Flow Testing of Fuel Assemblies in Framatome ANP’s PHTF

10th International Conference on Nuclear Engineering, Volume 3 ◽

10.1115/icone10-22428 ◽

2002 ◽

Author(s):

Imtiaz K. Madni ◽

Lance G. Stephens ◽

Dave M. Turner

Keyword(s):

Pressure Drop ◽

Pressure Loss ◽

Single Phase ◽

Test Facility ◽

Pressurized Water Reactor ◽

Hydraulic Test ◽

Pressurized Water ◽

Water Reactor ◽

Hydraulic Design ◽

Fuel Assemblies

Thermal-hydraulic analyses of pressurized water reactor (PWR) and boiling water reactor (BWR) fuel assemblies are generally performed for either assembly thermal-hydraulic design, thermal-hydraulic compatibility evaluation, or cycle licensing thermal-hydraulic characterization. A key issue in all cases is the hydraulic resistance characterization of the assembly in which the assembly, its components and support plates, etc., are represented by their respective pressure loss and pressure drop coefficients. These hydraulic coefficients can be determined by single-phase flow testing in an experimental facility such as the Framatome ANP Portable Hydraulic Test Facility (PHTF) located at Richland Test Facilities (RTF) in Richland, WA. The goal of this paper is to present a uniform and consistent methodology for the development of coefficient correlations from data obtained from single phase pressure drop testing of PWR and BWR fuel assemblies and their components performed in the PHTF. This methodology reflects the years of accumulated experience from an existing facility with an ongoing test program.

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Characterization of class 1 integrons carrying blaVIM-2 and blaVIM-4 gene cassette in Pseudomonas aeruginosa isolated in the University Clinical Hospital of Bialystok (northeastern Poland)

10.26226/morressier.56d6be75d462b80296c9763a ◽

2016 ◽

Author(s):

Pawel Sacha

Keyword(s):

Pseudomonas Aeruginosa ◽

Gene Cassette ◽

Clinical Hospital ◽

Class 1 Integrons ◽

Class 1 ◽

Northeastern Poland ◽

The University

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CHARACTERIZATION OF PRESSURE DROP AND VELOCITY FIELD IN A GAS-LIQUID CYCLONE SEPARATOR

10.26678/abcm.cobem2017.cob17-2270 ◽

2017 ◽

Author(s):

Juliana Loureiro ◽

Atila Pantaleão Silva Freire ◽

Gustavo Eduardo Oviedo Celis

Keyword(s):

Velocity Field ◽

Pressure Drop ◽

Cyclone Separator

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Scaling analysis of core pressure drop in reduced height integral test facility

Kerntechnik ◽

10.3139/124.110897 ◽

2018 ◽

Vol 83 (3) ◽

pp. 178-180

Author(s):

P. Ju ◽

B. Long ◽

L. Li ◽

Q. Su ◽

X. Wu ◽

...

Keyword(s):

Pressure Drop ◽

Test Facility ◽

Scaling Analysis ◽

Integral Test ◽

Reduced Height

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Development of a Multi-GHz Sampling Capability at the University of Maine UHF Test Facility

10.21236/ada392492 ◽

2001 ◽

Author(s):

Donald M. Hummels ◽

Fred Irons

Keyword(s):

Test Facility ◽

The University

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Clogging sensitivity of flow distributors designed for radially elongated hexagonal pillar array columns: a computational modelling

Scientific Reports ◽

10.1038/s41598-021-84178-w ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Farideh Haghighi ◽

Zahra Talebpour ◽

Amir Sanati-Nezhad

Keyword(s):

Pressure Drop ◽

Aspect Ratio ◽

Contact Zone ◽

Separation Efficiency ◽

Fluid Dynamic ◽

Computational Modelling ◽

Channel Width ◽

Fluid Distribution ◽

Design Parameters ◽

Pillar Array

AbstractFlow distributor located at the beginning of the micromachined pillar array column (PAC) has significant roles in uniform distribution of flow through separation channels and thus separation efficiency. Chip manufacturing artifacts, contaminated solvents, and complex matrix of samples may contribute to clogging of the microfabricated channels, affect the distribution of the sample, and alter the performance of both natural and engineered systems. An even fluid distribution must be achieved cross-sectionally through careful design of flow distributors and minimizing the sensitivity to clogging in order to reach satisfactory separation efficiency. Given the difficulty to investigate experimentally a high number of clogging conditions and geometries, this work exploits a computational fluid dynamic model to investigate the effect of various design parameters on the performance of flow distributors in equally spreading the flow along the separation channels in the presence of different degrees of clogging. An array of radially elongated hexagonal pillars was selected for the separation channel (column). The design parameters include channel width, distributor width, aspect ratio of the pillars, and number of contact zone rows. The performance of known flow distributors, including bifurcating (BF), radially interconnected (RI), and recently introduced mixed-mode (MMI) in addition to two new distributors designed in this work (MMII and MMIII) were investigated in terms of mean elution time, volumetric variance, asymmetry factors, and pressure drop between the inlet and the monitor line for each design. The results show that except for pressure drop, the channel width and aspect ratio of the pillars has no significant influence on flow distribution pattern in non-clogged distributors. However, the behavior of flow distributors in response to clogging was found to be dependent on width of the channels. Also increasing the distributor width and number of contact zone rows after the first splitting stage showed no improvement in the ability to alleviate the clogging. MMI distributor with the channel width of 3 µm, aspect ratio of the pillars equal to 20, number of exits of 8, and number of contact zones of 3 exhibited the highest stability and minimum sensitivity to different degrees of clogging.

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