Gleitz M. - Fusion reactors cooling. High heat flux cooling Hypervapotron (Work in progress)

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Ukrainian Nuclear Society

Презентація учасника VIII Міжнародної літньої ядерної школи, яка пройшла на Рівненській АЕС у липні 2019 року

Government & Nonprofit

Miroslav Gleitz
miroslav.gleitz@fs.cvut.cz
Fusion reactors cooling
High heat flux cooling
Hypervapotron
(Work in progress)
www.energetika.cvut.cz

1
Miroslav Gleitz
CTU in Prague, Fakulty of Mechanical Engineering,
Energy Engineering department (Power engineering)
• Doctor‘s studium (PhD), first year
• Part time job
UJV Energoproject, Nuclear Engineering department
• Part time job

Miroslav Gleitz
Bachelor‘s degree thesis (2016)
Design of heat pump
Master‘s degree thesis (2018)
A study of an energy cycle for Small Modular Reactor 30 MWt
(sCO2 cycle)
Doctor‘s degree (present)
Cooling system of fusion reacotrs
2

Cooling of Fusion Reacors
JET Tokamak inside, Culham in Oxfordshire
3

Cooling of Fusion Reactors
Many possible geometries for intensification of heat transfer
Disadvantage:
• Difficult (expensive)
• Pressure drops
• Lower possible heat flux
(against hypervapotron)
4

Hypervapotron
• Not Transformer
• Hyper, Vapor
5

Advantages of hypervapotron
• Relativly low pressure drops
• Allows higher possible heat flux
Hypervapotron
7

Hypervapotron
8
Concept of ITER‘s first wall hypervapotron
• Material CuCrZn
Up to 350 °C
• In DEMO reactor EUROFER
Up to 550 °C

Hypervapotron
• How to solve?
• Ansys Fluent 16.2 – has problems (Písek, 2016)
• Ansys CFX – possible (Milnes 2010, Pitoňák 2017)
• StarCCM+ – potentionally possible
(one of objects of this work)
9

Two methods how to solve two phase flow
• One phase flow (boiling included)
• Two phase flow
Hypervapotron (Star CCM+)
14

There is 7 types of two (and more) phase flow:
• Eulerian Multiphase (EMP)
• Mixture Multiphase (MMP)
• Volume Of Fluid (VOF)
• Dispersed Multiphase (DMP)
• Fluid Film (Film)
• Lagrangian Multiphase (LMP)
• Discrete Element Method (DEM)
Hypervapotron (Star CCM+)
15

Phase interaction
• Interphase Forces
- Drag
- Lift (Due to shear)
- Virtual Mass (Due to acceleration)
- Wall Lubrication Force (Due to shear in boundary layer)
- Turbulent Dispersion Force (Accounts interaction with turbulent eddies)
- User Potential Force (For applications such as foams and flow in porous media where
capillary or osmotic pressure is important)
• Interphase Mass Transfer
- Wall and Bulk Boiling
- Reactions
- Single Component Crystal Growth
• Interphase Energy Transfer
Eulerian Multiphase (EMP)
16

Srovnání modelů distribuce rozptýlené fáze
Eulerian Multiphase (EMP)
17

Hypervapotron
25
Harmonogram:
1. Concept and construction of experimental loop,
Concept of experimental canal
2. Design of experimental canal
a) Solidworks, StarCCM+
b) CAD model, Canal manufacturing
3. Connection of the experimental canal to the experimantal loop,
setting the loop to run properly
4. Data collection, validation
5. Evaluation

Testovací smyčka
Pitoňák 2017
26
• Primarily from heating part
• Dominating material Cu ->
-> water regime (higher pH)

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