Two-Layer Model for the Heat Transfer to Supercritical CO 2
|
|
- Griffin McCarthy
- 6 years ago
- Views:
Transcription
1 5th International CO 2 Poer Cycles Symposium March 28-31, 2016, San Antonio, USA To-Layer Model for the Heat Transfer to Supercritical CO 2 E. Laurien, S. Pandey Institute of Nuclear Technology and Energy Systems University of Stuttgart, Germany D.M. McEligot* Nuclear Engineering Division University of Idaho, USA
2 Outline Introduction To-Layer Model for a Supercritical Fluid Extension to Take Account of Buoyancy Application to the Lo-Temperature Recuperator Application to the Reject Heat Exchanger Conclusion Starflinger Institutsversammlung
3 Temperature T [ C] Supercritical CO 2 -Loop for Energy Conversion MIT-Study 800 ~77 ar HighTemp Recuparator Lo Temp Recuparator % ar 78 ar advanced design 5 4 Input HX Reject HX Alternator 1 Turine Re-Compressor Main Compressor V. Dostal, M.J. Driscoll, P. Hejzlar: A Supercritical Caron Dioxide Cycle for Next Generation Nuclear Reactors, MIT- ANP-TR-100 (2004) 3 ~200 ar 60% Lo-Temp Recuperator ar ar 6 critical point 8 0 1,0 1 1,5 2,0 2,5 3,0 entropy s [kj/kg] [entropy s kj/kgk]
4 Fluid Properties oc CO2 Dichte dyn. Zähigkeit Wärmeleitfähigkeit Temperatur vs. Enthalpie "S-Kurve" T pc h pc W. Lemmon, Marcia L. Huer, and Mark O. McLinden Thermophysical Properties Division National Institute of Standards and Technology Program. REFPROP (2014)
5 Starflinger Institutsversammlung
6 Experiments y Kim et al ar heated all Starflinger Institutsversammlung
7 Integration Domain an Governing Equations Su-Headline pipe axis all T (x) Theoretical Description Methods: Lookup Tale D/2 CFD (RANS and DNS) dx x, u G y, y + (x) r, R q g 1-dimensional theory y Laurien 2012 Explicit or implicit formulas (model equations), correlations e Nu a Re 1 Pr e2 e3 e4 e5 c c p e6
8 u u To-Layer Method Constant Properties u Re Velocity la of the all 1 u ( y ) ln y D u C u Re 8 c f C ( T q W W T ) u c p T Temperature la of the all PrT T ( y ) ln y (Pr) Pr T u y T Pr y y y u y u y laminar (viscous) su-layer y vs turulent all layer 11.6 laminar (conducting) su-layer y cs turulent all layer y Pr vs 1 3
9 Heat Transfer Friction temperature increase all shear stress Headline Su-Headline y Scaling ith ulk quantities y u u y Scaling ith all quantities y u u created at the all Re 1 c f um D 2 log 10 D Re c f c f c f c f 8 u 2 m turulent Layer (tur) T tur T tur T q W PrT tur u c ln R ln y cs conducting sulayer (cs) T cs Tcs u q c W 2/3 T cs Pr yvs T T cs T T cs T T tur cs
10 Temperature T Result of the Original Method Experiment Li et al Bulk fluid enthalpy h (kj/kg) deterioration can e predicted, ut some iaccuracies remain
11 Headline Su-Headline Recycle inlet r z g q L 1 =5D L 2 =30D/60D Re Autor: Xu Chu, IKE Code: OpenFoam Cray XC-40 'HazelHen' des HLRS ca CPU-cores L 2 30D 60D + r z (R θ) no of cells Mio. 150 Mio.
12 Re = 5400 Vertikales eheiztes Rohr Ref.: DNS: Xu Chu, IKE, 2015 aufärts thermisch stail aärts thermisch instail g Visualisierung der Turulenzstrukturen mit dem λ 2 Kriterium g
13 Caliration of the Method Starflinger Institutsversammlung
14 Extension of the Method to take account of acceleration and uoyancy Implementation in the method Acceleration Parameter 4q u K h m v ; 2 GD h c p y 11.8 c vs v K v Parameter for the 'structural' effect of uoyancy Gr Ri 2 Re y cs 11.8 Pr 1 3 cs c uoyin, Ri Parameter for the 'external' effect of uoyancy Gr 2 3 g D T T 7 z 5D 2, mod c uoyex, 10 Gr 1 e
15 Lo-Temperature Recuperator, Secondary Side 200 ar upard flo all shear stress all temperature
16 Lo-Temperature Recuperator, Secondary Side 200 ar donard flo all shear stress all temperature
17 Lo-Temperature Recuperator, Primary Side 80 ar cooling all shear stress all temperature
18 Reject-Heat Exchanger 80 ar cooling all shear stress all temperature
19 Conclusion The to-layer model has een modified to take account of uoyancy and acceleration in a vertical (upeard or donard) supercritical pipe flo at lo Reynolds numers (Re < 10000) Wall temperature and all shear stress are determined as a function of pressure, pipe diameter, all heat flux (heating or cooling), mass flux, and ulk enthalpy Empirical model parameters have een determined using to results of Direct Numerical Simulations must e extended y further ork (in progress) Model is applied to flos in the lo-temperature recuperator and the reject-heat exchanger
Two-Layer Model for the. Heat Transfer to Supercritical CO 2. E. Laurien, S. Pandey, and D. M. McEligot*
5 th International Supercritical CO Poer Cycles Symposium March 8-31, 016 San Antonio, USA To-Layer Model for the Heat Transfer to Supercritical CO E. Laurien, S. Pandey, and D. M. McEligot* University
More informationThe Dominant Thermal Resistance Approach for Heat Transfer to Supercritical-Pressure Fluids
The Dominant Thermal Resistance Approach for Heat Transfer to Supercritical-Pressure Fluids Donald M. McEligot 1,2, Eckart Laurien 3, Shuisheng He 4 and Wei Wang 4,5 1. Nuclear Engineering Division, U.
More informationDirect numerical simulation database for supercritical carbon dioxide
Direct numerical simulation database for supercritical carbon dioxide S. Pandey 1, X. Chu 2, E. Laurien 3 Emails: sandeep.pandey@ike.uni-stuttgart.de 1 xu.chu@itlr.uni-stuttgart.de 2 laurien@ike.unistuttgart.de
More informationAkshay Khadse, Lauren Blanchette, Mahmood Mohagheghi, Jayanta Kapat
Impact of S-CO2 Properties on Centrifugal Compressor Impeller: Comparison of Two Loss Models for Mean Line Analyses The Supercritical CO2 Power Cycles Symposium 2016 Akshay Khadse, Lauren Blanchette, Mahmood
More informationThe dominant thermal resistance approach for heat transfer to supercritical-pressure fluids
The 6th International Supercritical CO 2 Power Cycles Symposium March 27-29, 2018, Pittsburgh, Pennsylvania The dominant thermal resistance approach for heat transfer to supercritical-pressure fluids Donald
More informationIntroduction to Heat and Mass Transfer. Week 14
Introduction to Heat and Mass Transfer Week 14 Next Topic Internal Flow» Velocity Boundary Layer Development» Thermal Boundary Layer Development» Energy Balance Velocity Boundary Layer Development Velocity
More informationcen29305_ch08.qxd 11/30/05 3:05 PM Page 451 INTERNAL FORCED CONVECTION CHAPTER 8 Liquid or gas flow through pipes or ducts is commonly used in heating
cen29305_ch08.qxd 11/30/05 3:05 PM Page 451 INTERNAL FORCED CONVECTION CHAPTER 8 Liquid or gas flow through pipes or ducts is commonly used in heating and cooling applications. The fluid in such applications
More informationForced Convection: Inside Pipe HANNA ILYANI ZULHAIMI
+ Forced Convection: Inside Pipe HANNA ILYANI ZULHAIMI + OUTLINE u Introduction and Dimensionless Numbers u Heat Transfer Coefficient for Laminar Flow inside a Pipe u Heat Transfer Coefficient for Turbulent
More informationTutorial 1. Where Nu=(hl/k); Reynolds number Re=(Vlρ/µ) and Prandtl number Pr=(µCp/k)
Tutorial 1 1. Explain in detail the mechanism of forced convection. Show by dimensional analysis (Rayleigh method) that data for forced convection may be correlated by an equation of the form Nu = φ (Re,
More informationMulti-Fidelity Computational Flow Assurance for Design and Development of Subsea Systems and Equipment Simon Lo
Multi-Fidelity Computational Flow Assurance for Design and Development of Subsea Systems and Equipment Simon Lo CD-adapco, Trident House, Basil Hill Road, Didcot, OX11 7HJ, UK Multi-Fidelity Computational
More informationThe Meaning and Significance of Heat Transfer Coefficient. Alan Mueller, Chief Technology Officer
The Meaning and Significance of Heat Transfer Coefficient Alan Mueller, Chief Technology Officer The Meaning of Heat Transfer Coefficient I kno the meaning of HTC! Why should I aste my time listening to
More informationHEAT TRANSFER AT SUPERCRITICAL PRESSURES (SURVEY) 1
HEAT TRANSFER AT SUPERCRITICAL PRESSURES (SURVEY) 1 Igor Pioro*, Hussam Khartail and Romney Duffey Chalk River Laoratories, AECL, Chalk River, ON, Canada K0J 1J0 Keywords: Supercritical pressure, forced
More informationAdvanced Heat and Mass Transfer by Amir Faghri, Yuwen Zhang, and John R. Howell
Laminar external natural convection on vertical and horizontal flat plates, over horizontal and vertical cylinders and sphere, as well as plumes, wakes and other types of free flow will be discussed in
More informationPresented at The 5th International Symposium Supercritical CO2 Power Cycles March 28-31, 2016, San Antonio, Texas
1 Use of 1-D Finite Enthalpy Method for a High-Temperature Recuperator Made of Polymer Derived Ceramic Composite for a Supercritical Carbon Dioxide Power System Mahmood Mohagheghi, Husam Zawati, Jihua
More informationCOMPARISON OF MEASURED AND ANALYTICAL PERFORMANCE OF SHELL-AND-TUBE HEAT EXCHANGERS COOLING AND HEATING SUPERCRITICAL CARBON DIOXIDE
The 4th International Symposium - Supercritical CO Power Cycles September 9-10, 014, Pittsburgh, Pennsylvania COMPARISON OF MEASURED AND ANALYTICAL PERFORMANCE OF SHELL-AND-TUBE HEAT EXCHANGERS COOLING
More informationطراحی مبدل های حرارتی مهدي کریمی ترم بهار HEAT TRANSFER CALCULATIONS
طراحی مبدل های حرارتی مهدي کریمی ترم بهار 96-97 HEAT TRANSFER CALCULATIONS ١ TEMPERATURE DIFFERENCE For any transfer the driving force is needed General heat transfer equation : Q = U.A. T What T should
More informationIntroduction to Heat and Mass Transfer. Week 14
Introduction to Heat and Mass Transfer Week 14 HW # 7 prob. 2 Hot water at 50C flows through a steel pipe (thermal conductivity 14 W/m-K) of 100 mm outside diameter and 8 mm wall thickness. During winter,
More informationPrinciples of Convection
Principles of Convection Point Conduction & convection are similar both require the presence of a material medium. But convection requires the presence of fluid motion. Heat transfer through the: Solid
More informationLaminar flow heat transfer studies in a twisted square duct for constant wall heat flux boundary condition
Sādhanā Vol. 40, Part 2, April 2015, pp. 467 485. c Indian Academy of Sciences Laminar flow heat transfer studies in a twisted square duct for constant wall heat flux boundary condition RAMBIR BHADOURIYA,
More informationINVESTIGATION OF THE THERMAL BOUNDARY LAYER DEVELOPMENT LENGTH IN ANNULAR UPWARD HEATED SUPERCRITICAL FLUID FLOWS
INVESTIGATION OF THE THERMAL BOUNDARY LAYER DEVELOPMENT LENGTH IN ANNULAR UPWARD HEATED SUPERCRITICAL FLUID FLOWS JURRIAAN W. R. PEETERS Delft University of Technology, Department of Radiation, Radionuclides
More information6. Laminar and turbulent boundary layers
6. Laminar and turbulent boundary layers John Richard Thome 8 avril 2008 John Richard Thome (LTCM - SGM - EPFL) Heat transfer - Convection 8 avril 2008 1 / 34 6.1 Some introductory ideas Figure 6.1 A boundary
More informationHeat Transfer to Sub- and Supercritical Water at Low Mass Fluxes: Numerical Analysis and Experimental Validation
Heat Transfer to Sub- and Supercritical Water at Lo Mass Fluxes: Numerical Analysis and Experimental Validation Samuel O. Odu a, Pelle Koster a, Aloijsius G. J. van der Ham a,*, Martin A.van der Hoef b,
More informationLecture 30 Review of Fluid Flow and Heat Transfer
Objectives In this lecture you will learn the following We shall summarise the principles used in fluid mechanics and heat transfer. It is assumed that the student has already been exposed to courses in
More informationCOMPARISON STUDY FOR FORCED CONVECTION HEAT TRANSFER OF SUPERCRITICAL CARBON DIOXIDE FLOWING IN A PIPE
HEFAT214 1 th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics 14 26 July 214 Orlando, Florida COMPARISON STUDY FOR FORCED CONVECTION HEAT TRANSFER OF SUPERCRITICAL CARBON
More informationTankExampleNov2016. Table of contents. Layout
Table of contents Task... 2 Calculation of heat loss of storage tanks... 3 Properties ambient air Properties of air... 7 Heat transfer outside, roof Heat transfer in flow past a plane wall... 8 Properties
More informationEXPERIMENTAL INVESTIGATION OF EFFECTS OF BUOYANCY ON SUPERCRITICAL CARBON DIOXIDE HEAT TRANSFER IN ROUND TUBES
The 4th International Symposium - Supercritical CO2 Power Cycles September 9-10, 2014, Pittsburgh, Pennsylvania EXPERIMENTAL INVESTIGATION OF EFFECTS OF BUOYANCY ON SUPERCRITICAL CARBON DIOXIDE HEAT TRANSFER
More informationLectures on Applied Reactor Technology and Nuclear Power Safety. Lecture No 6
Lectures on Nuclear Power Safety Lecture No 6 Title: Introduction to Thermal-Hydraulic Analysis of Nuclear Reactor Cores Department of Energy Technology KTH Spring 2005 Slide No 1 Outline of the Lecture
More informationConvection. forced convection when the flow is caused by external means, such as by a fan, a pump, or atmospheric winds.
Convection The convection heat transfer mode is comprised of two mechanisms. In addition to energy transfer due to random molecular motion (diffusion), energy is also transferred by the bulk, or macroscopic,
More informationHeat processes. Heat exchange
Heat processes Heat exchange Heat energy transported across a surface from higher temperature side to lower temperature side; it is a macroscopic measure of transported energies of molecular motions Temperature
More informationHeat Transfer Convection
Heat ransfer Convection Previous lectures conduction: heat transfer without fluid motion oday (textbook nearly 00 pages) Convection: heat transfer with fluid motion Research methods different Natural Convection
More informationOverview of Convection Heat Transfer
Overview of Convection Heat Transfer ME 448/548 Notes Gerald Recktenwald Portland State University Department of Mechanical Engineering gerry@me.pdx.edu February 23, 2012 ME 448/548: Convection Heat Transfer
More informationNumerical Investigation on The Convective Heat Transfer Enhancement in Coiled Tubes
Numerical Investigation on The Convective Heat Transfer Enhancement in Coiled Tubes Luca Cattani Department of Industrial Engineering - University of Parma Excerpt from the Proceedings of the 2012 COMSOL
More informationOverview of Convection Heat Transfer
Overview of Convection Heat Transfer ME 448/548 Notes Gerald Recktenwald Portland State University Department of Mechanical Engineering gerry@me.pdx.edu February 23, 2012 ME 448/548: Convection Heat Transfer
More informationConvective Mass Transfer
Convective Mass Transfer Definition of convective mass transfer: The transport of material between a boundary surface and a moving fluid or between two immiscible moving fluids separated by a mobile interface
More informationUniversity of Rome Tor Vergata
University of Rome Tor Vergata Faculty of Engineering Department of Industrial Engineering THERMODYNAMIC AND HEAT TRANSFER HEAT TRANSFER dr. G. Bovesecchi gianluigi.bovesecchi@gmail.com 06-7259-727 (7249)
More informationConvection Heat Transfer. Introduction
Convection Heat Transfer Reading Problems 12-1 12-8 12-40, 12-49, 12-68, 12-70, 12-87, 12-98 13-1 13-6 13-39, 13-47, 13-59 14-1 14-4 14-18, 14-24, 14-45, 14-82 Introduction Newton s Law of Cooling Controlling
More informationConvection in Three-Dimensional Separated and Attached Flow
Convection in Three-Dimensional Separated and Attached Flow B. F. Armaly Convection Heat Transfer Laboratory Department of Mechanical and Aerospace Engineering, and Engineering Mechanics University of
More informationIsentropic Efficiency in Engineering Thermodynamics
June 21, 2010 Isentropic Efficiency in Engineering Thermodynamics Introduction This article is a summary of selected parts of chapters 4, 5 and 6 in the textbook by Moran and Shapiro (2008. The intent
More informationAN EXPERIMENTAL STUDY OF MIXED CONVECTION HEAT TRANSFER IN AN INCLINED RECTANGULAR DUCT EXPOSED TO UNIFORM HEAT FLUX FROM UPPER SURFACE
AN EXPERIMENTAL STUDY OF MIXED CONVECTION HEAT TRANSFER IN AN INCLINED RECTANGULAR DUCT EXPOSED TO UNIFORM HEAT FLUX FROM UPPER SURFACE Dr. Ahmed F. Khudheyer Ali Jawad Obaid Mazin Y. Abdul-Kareem ahyaja@yahoo.com
More informationME Thermodynamics I
HW-22 (25 points) Given: 1 A gas power cycle with initial properties as listed on the EFD. The compressor pressure ratio is 25:1 Find: 1 Sketch all the processes on a p-h diagram and calculate the enthalpy,
More informationEntropy Generation in Steady Laminar Boundary Layers with Pressure Gradients
Entropy 2014, 16, 3808-3812; doi:10.3390/e16073808 Letter OPEN ACCESS entropy ISSN 1099-4300 www.mdpi.com/journal/entropy Entropy Generation in Steady Laminar Boundary Layers with Pressure Gradients Donald
More informationUsing NASA s GFSSP Code for Steady State and Transient Modeling of Gas Cooled Reactor Passive Safety Systems
Using NASA s GFSSP Code for Steady State and Transient Modeling of Gas Cooled Reactor Passive Safety Systems Wesley C. Williams, PhD, PE Craft and Hawkins Department of Petroleum Engineering Louisiana
More informationNumerical Study of the Capability of Various Turbulence Models to Predict the Heat Transfer Characteristics of Supercritical Water Flow
International Journal of Computational Engineering Research Vol, 03 Issue, 8 Numerical Study of the Capability of Various Turbulence Models to Predict the Heat Transfer Characteristics of Supercritical
More informationConvection. U y. U u(y) T s. T y
Convection Heat transfer in the presence of a fluid motion on a solid surface Various mechanisms at play in the fluid: - advection physical transport of the fluid - diffusion conduction in the fluid -
More informationReview Article Review of the Wall Temperature Prediction Capability of Available Correlations for Heat Transfer at Supercritical Conditions of Water
Hindawi Pulishing Corporation Energy Volume 2013, Article ID 159098, 13 pages http://dx.doi.org/10.1155/2013/159098 Review Article Review of the Wall Temperature Prediction Capaility of Availale Correlations
More informationThermal-Hydraulic Simulation of Supercritical-Water-Cooled Reactors
Thermal-Hydraulic Simulation of Supercritical-Water-Cooled Reactors 8 Markku Hänninen and Joona Kurki VTT Technical Research Centre of Finland Tietotie 3, Espoo, FI-02044 VTT, Finland 1. Introduction At
More informationCFD Study of the Turbulent Forced Convective Heat Transfer of Non-Newtonian Nanofluid
Reduction of Parasitic Currents in Simulation of Droplet Secondary Breakup with Density Ratio Higher than 60 by InterDyMFoam Iranian Journal of Chemical Engineering Vol. 11, No. 2 (Spring 2014), IAChE
More informationHideki Kamide 1. A. Ono 1, N. Kimura 1, J. Endoh 2 and O. Watanabe 2
International Conference on Fast Reactors and Related Fuel Cycles: Safe Technologies and Sustainable Scenarios (FR13) Hideki Kamide 1 A. Ono 1, N. Kimura 1, J. Endoh 2 and O. Watanabe 2 1: Japan Atomic
More informationThe 5th International Symposium Supercritical CO2 Power Cycles March 28-31, 2016, San Antonio, Texas ABSTRACT
The 5th International Symposium Supercritical CO2 Power Cycles March 28-31, 2016, San Antonio, Texas Use of 1-D Finite Enthalpy Method for a High-Temperature Recuperator Made of Polymer Derived Ceramic
More informationTutorial for the heated pipe with constant fluid properties in STAR-CCM+
Tutorial for the heated pipe with constant fluid properties in STAR-CCM+ For performing this tutorial, it is necessary to have already studied the tutorial on the upward bend. In fact, after getting abilities
More informationThe exergy of asystemis the maximum useful work possible during a process that brings the system into equilibrium with aheat reservoir. (4.
Energy Equation Entropy equation in Chapter 4: control mass approach The second law of thermodynamics Availability (exergy) The exergy of asystemis the maximum useful work possible during a process that
More informationPHYSICAL MECHANISM OF CONVECTION
Tue 8:54:24 AM Slide Nr. 0 of 33 Slides PHYSICAL MECHANISM OF CONVECTION Heat transfer through a fluid is by convection in the presence of bulk fluid motion and by conduction in the absence of it. Chapter
More informationHeat Transfer Predictions for Carbon Dioxide in Boiling Through Fundamental Modelling Implementing a Combination of Nusselt Number Correlations
Heat Transfer Predictions for Carbon Dioxide in Boiling Through Fundamental Modelling Implementing a Combination of Nusselt Number Correlations L. Makaum, P.v.Z. Venter and M. van Eldik Abstract Refrigerants
More informationLaminar and Turbulent developing flow with/without heat transfer over a flat plate
Laminar and Turbulent developing flow with/without heat transfer over a flat plate Introduction The purpose of the project was to use the FLOLAB software to model the laminar and turbulent flow over a
More informationChapter 3 NATURAL CONVECTION
Fundamentals of Thermal-Fluid Sciences, 3rd Edition Yunus A. Cengel, Robert H. Turner, John M. Cimbala McGraw-Hill, 2008 Chapter 3 NATURAL CONVECTION Mehmet Kanoglu Copyright The McGraw-Hill Companies,
More informationComputation of turbulent natural convection at vertical walls using new wall functions
Computation of turbulent natural convection at vertical alls using ne all functions M. Hölling, H. Herig Institute of Thermo-Fluid Dynamics Hamburg University of Technology Denickestraße 17, 2173 Hamburg,
More informationUNIT II CONVECTION HEAT TRANSFER
UNIT II CONVECTION HEAT TRANSFER Convection is the mode of heat transfer between a surface and a fluid moving over it. The energy transfer in convection is predominately due to the bulk motion of the fluid
More informationTHERMAL ACCELERATION OF SCW FLOW IN HEAT-GENERATING CHANNELS AS A FACTOR OF HEAT TRANSFER DETERIORATION
Technical Meeting on Heat Transfer, Thermal-Hydraulics and System Design for Supercritical Water Cooled Reactors 4 August 06 The Diamond, The University of Sheffield Sheffield, United Kingdom THERMAL ACCELERATION
More informationEmpirical Co - Relations approach for solving problems of convection 10:06:43
Empirical Co - Relations approach for solving problems of convection 10:06:43 10:06:44 Empirical Corelations for Free Convection Use T f or T b for getting various properties like Re = VL c / ν β = thermal
More informationInternal Forced Convection. Copyright The McGraw-Hill Companies, Inc. Permission required for reproduction or display.
Internal Forced Convection Copyright The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Introduction Pipe circular cross section. Duct noncircular cross section. Tubes small-diameter
More informationHeat Transfer. Solutions for Vol I _ Classroom Practice Questions. Chapter 1 Conduction
Heat ransfer Solutions for Vol I _ lassroom Practice Questions hapter onduction r r r K K. ns: () ase (): Higher thermal conductive material is inside and lo thermal conductive material is outside K K
More informationOutlines. simple relations of fluid dynamics Boundary layer analysis. Important for basic understanding of convection heat transfer
Forced Convection Outlines To examine the methods of calculating convection heat transfer (particularly, the ways of predicting the value of convection heat transfer coefficient, h) Convection heat transfer
More information6.2 Governing Equations for Natural Convection
6. Governing Equations for Natural Convection 6..1 Generalized Governing Equations The governing equations for natural convection are special cases of the generalized governing equations that were discussed
More informationThermal-hydraulic performance of discontinuous fin heat exchanger geometries using Supercritical CO2 as the working fluid
The 6th International Supercritical CO2 Power Cycles Symposium March 27-29, 2018, Pittsburgh, Pennsylvania Thermal-hydraulic performance of discontinuous fin heat exchanger geometries using Supercritical
More informationExperimental and Theoretical Investigation of Hydrodynamics Characteristics and Heat Transfer for Newtonian and Non-newtonian Fluids
International Journal of Energy Science and Engineering Vol. 2, No. 3, 2016, pp. 13-22 http://www.aiscience.org/journal/ijese ISSN: 2381-7267 (Print); ISSN: 2381-7275 (Online) Experimental and Theoretical
More informationStatus and Future Challenges of CFD for Liquid Metal Cooled Reactors
Status and Future Challenges of CFD for Liquid Metal Cooled Reactors IAEA Fast Reactor Conference 2013 Paris, France 5 March 2013 Ferry Roelofs roelofs@nrg.eu V.R. Gopala K. Van Tichelen X. Cheng E. Merzari
More informationEXPERIMENTAL AND NUMERICAL STUDIES OF A SPIRAL PLATE HEAT EXCHANGER
THERMAL SCIENCE: Year 2014, Vol. 18, No. 4, pp. 1355-1360 1355 EXPERIMENTAL AND NUMERICAL STUDIES OF A SPIRAL PLATE HEAT EXCHANGER by Rangasamy RAJAVEL Department of Mechanical Engineering, AMET University,
More informationHEAT TRANSFER CAPABILITY OF A THERMOSYPHON HEAT TRANSPORT DEVICE WITH EXPERIMENTAL AND CFD STUDIES
HEAT TRANSFER CAPABILITY OF A THERMOSYPHON HEAT TRANSPORT DEVICE WITH EXPERIMENTAL AND CFD STUDIES B.M. Lingade a*, Elizabeth Raju b, A Borgohain a, N.K. Maheshwari a, P.K.Vijayan a a Reactor Engineering
More informationSimulation of Free Convection with Conjugate Heat Transfer
Simulation of Free Convection with Conjugate Heat Transfer Hong Xu, Chokri Guetari, Kurt Svihla ANSYS, Inc. Abstract This study focuses on free convective and conjugate heat transfer in a naturally ventilated,
More informationESO201A: Thermodynamics
ESO201A: Thermodynamics First Semester 2015-2016 Mid-Semester Examination Instructor: Sameer Khandekar Time: 120 mins Marks: 250 Solve sub-parts of a question serially. Question #1 (60 marks): One kmol
More informationCFD ANALYSIS OF TURBULENT THERMAL MIXING OF HOT AND COLD AIR IN AUTOMOBILE HVAC UNIT
ISTP-6, 005, PRAGUE 6 TH INTERNATIONAL SYMPOSIUM ON TRANSPORT PHENOMENA CFD ANALYSIS OF TURBULENT THERMAL MIING OF HOT AND COLD AIR IN AUTOMOBILE HVAC UNIT Hideo Asano ((, Kazuhiko Suga (3, Masafumi Hirota
More informationValidation analyses of advanced turbulence model approaches for stratified two-phase flows
Computational Methods in Multiphase Flow VIII 361 Validation analyses of advanced turbulence model approaches for stratified two-phase flows M. Benz & T. Schulenberg Institute for Nuclear and Energy Technologies,
More informationInternational Journal of Heat and Mass Transfer
International Journal of Heat and Mass Transfer 56 (2013) 741 749 Contents lists available at SciVerse ScienceDirect International Journal of Heat and Mass Transfer journal homepage: www.elsevier.com/locate/ijhmt
More informationHIGH TEMPERATURE THERMAL HYDRAULICS MODELING
HIGH TEMPERATURE THERMAL HYDRAULICS MODELING OF A MOLTEN SALT: APPLICATION TO A MOLTEN SALT FAST REACTOR (MSFR) P. R. Rubiolo, V. Ghetta, J. Giraud, M. Tano Retamales CNRS/IN2P3/LPSC - Grenoble Workshop
More informationChapter 10 Flow in Conduits
Chapter 10 Flow in Conduits 10.1 Classifying Flow Laminar Flow and Turbulent Flow Laminar flow Unpredictable Turbulent flow Near entrance: undeveloped developing flow In developing flow, the wall shear
More informationEngineering Fluid Mechanics
Engineering Fluid Mechanics Eighth Edition Clayton T. Crowe WASHINGTON STATE UNIVERSITY, PULLMAN Donald F. Elger UNIVERSITY OF IDAHO, MOSCOW John A. Roberson WASHINGTON STATE UNIVERSITY, PULLMAN WILEY
More informationAngular momentum equation
Angular momentum equation For angular momentum equation, B =H O the angular momentum vector about point O which moments are desired. Where β is The Reynolds transport equation can be written as follows:
More informationvector H. If O is the point about which moments are desired, the angular moment about O is given:
The angular momentum A control volume analysis can be applied to the angular momentum, by letting B equal to angularmomentum vector H. If O is the point about which moments are desired, the angular moment
More informationInvestigation of heat transfer model for horizontal tubes at supercritical pressures of CO2
The 6th International Supercritical CO2 Power Cycles Symposium March 27-29, 2018, Pittsburgh, Pennsylvania Investigation of heat transfer model for horizontal tubes at supercritical pressures of CO2 Tae
More informationParallel Plate Heat Exchanger
Parallel Plate Heat Exchanger Parallel Plate Heat Exchangers are use in a number of thermal processing applications. The characteristics are that the fluids flow in the narrow gap, between two parallel
More informationCFD ANALYSIS OF TURBULENT MIXED CONVECTION UPWARD FLOW OF SUPERCRITICAL WATER IN A VERTICAL TUBE
CFD ANALYSIS OF TURBULENT MIXED CONVECTION UPWARD FLOW OF SUPERCRITICAL WATER IN A VERTICAL TUBE ABSTRACT Vladimir Agranat Applied Computational Fluid Dynamics Analysis Thornhill, Ontario, Canada vlad@acfda.org
More informationExternal Flows. Dye streak. turbulent. laminar transition
Eternal Flos An internal flo is surrounded by solid boundaries that can restrict the development of its boundary layer, for eample, a pipe flo. An eternal flo, on the other hand, are flos over bodies immersed
More information70 M. Mohseni and M. Bazargan Re Re t S k S " T u v x y + Greek Symbols Reynolds number Turbulent Reynolds number Source term in k equation Source ter
JAST, Vol. 7, No. 2, pp 69{79 c Iranian Aerospace Society, Summer-Fall 2010 Numerical Predictions of Turbulent Mixed Convection Heat Transfer to Supercritical Fluids Using Various Low Reynolds Number k-"
More informationFREE CONVECTIVE HEAT TRANSFER FROM AN OBJECT AT LOW RAYLEIGH NUMBER
Free Convective Heat Transfer From an Object at Low Rayleigh Number FREE CONVECTIVE HEAT TRANSFER FROM AN OBJECT AT LOW RAYLEIGH NUMBER Md. Golam Kader and Khandkar Aftab Hossain * Department of Mechanical
More informationChapter 10: Boiling and Condensation 1. Based on lecture by Yoav Peles, Mech. Aero. Nuc. Eng., RPI.
Chapter 10: Boiling and Condensation 1 1 Based on lecture by Yoav Peles, Mech. Aero. Nuc. Eng., RPI. Objectives When you finish studying this chapter, you should be able to: Differentiate between evaporation
More informationENGINEERING OF NUCLEAR REACTORS. Tuesday, October 9 th, 2014, 1:00 2:30 p.m.
.31 ENGINEERING OF NUCLEAR REACTORS Tuesday, October 9 th, 014, 1:00 :30 p.m. OEN BOOK QUIZ 1 (solutions) roblem 1 (50%) Loss o condensate pump transient in a LWR condenser i) Consider the seaater in the
More informationAnalysis and interpretation of the LIVE-L6 experiment
Analysis and interpretation of the LIVE-L6 experiment A. Palagin, A. Miassoedov, X. Gaus-Liu (KIT), M. Buck (IKE), C.T. Tran, P. Kudinov (KTH), L. Carenini (IRSN), C. Koellein, W. Luther (GRS) V. Chudanov
More informationSummary of Dimensionless Numbers of Fluid Mechanics and Heat Transfer
1. Nusselt number Summary of Dimensionless Numbers of Fluid Mechanics and Heat Transfer Average Nusselt number: convective heat transfer Nu L = conductive heat transfer = hl where L is the characteristic
More informationUNIFORM FLOW CRITICAL FLOW GRADUALLY VARIED FLOW
UNIFORM FLOW CRITICAL FLOW GRADUALLY VARIED FLOW Derivation of uniform flow equation Dimensional analysis Computation of normal depth UNIFORM FLOW 1. Uniform flow is the flow condition obtained from a
More informationFundamental Concepts of Convection : Flow and Thermal Considerations. Chapter Six and Appendix D Sections 6.1 through 6.8 and D.1 through D.
Fundamental Concepts of Convection : Flow and Thermal Considerations Chapter Six and Appendix D Sections 6.1 through 6.8 and D.1 through D.3 6.1 Boundary Layers: Physical Features Velocity Boundary Layer
More informationCFD Simulation of high pressure real gas flows
CFD Simulation of high pressure real gas flows on the progress form art to physics :o) Maria Magdalena Poschner Prof. Dr. rer. nat. Pfitzner UNIVERSITÄT DER BUNDESWEHR MÜNCHEN Fakultät für Luft und Raumfahrt
More informationInternational Journal of Thermal Sciences
International Journal of Thermal Sciences 50 (2011) 2430e2442 Contents lists availale at ScienceDirect International Journal of Thermal Sciences journal homepage: www.elsevier.com/locate/ijts Development
More informationProblem 4.3. Problem 4.4
Problem 4.3 Problem 4.4 Problem 4.5 Problem 4.6 Problem 4.7 This is forced convection flow over a streamlined body. Viscous (velocity) boundary layer approximations can be made if the Reynolds number Re
More informationCircle one: School of Mechanical Engineering Purdue University ME315 Heat and Mass Transfer. Exam #2. April 3, 2014
Circle one: Div. 1 (12:30 pm, Prof. Choi) Div. 2 (9:30 am, Prof. Xu) School of Mechanical Engineering Purdue University ME315 Heat and Mass Transfer Exam #2 April 3, 2014 Instructions: Write your name
More informationwhere = rate of change of total energy of the system, = rate of heat added to the system, = rate of work done by the system
The Energy Equation for Control Volumes Recall, the First Law of Thermodynamics: where = rate of change of total energy of the system, = rate of heat added to the system, = rate of work done by the system
More informationSimulations of Fluid Dynamics and Heat Transfer in LH 2 Absorbers
Simulations of Fluid Dynamics and Heat Transfer in LH 2 Absorbers Kevin W. Cassel, Aleksandr V. Obabko and Eyad A. Almasri Fluid Dynamics Research Center, Mechanical, Materials and Aerospace Engineering
More informationBuoyancy-induced Flow:
Buoyancy-induced Flow: Natural Convection in a Unconfined Space If we examine the flow induced by heat transfer from a single vertical flat plat, we observe that the flow resembles that of a boundary layer.
More informationLectures on Applied Reactor Technology and Nuclear Power Safety. Lecture No 7
ectures on Nuclear Power Safety ecture No 7 itle: hermal-hydraulic nalysis of Single-Phase lows in Heated hannels Department of Energy echnology KH Spring 005 Slide No Outline of the ecture lad-oolant
More informationME 331 Homework Assignment #6
ME 33 Homework Assignment #6 Problem Statement: ater at 30 o C flows through a long.85 cm diameter tube at a mass flow rate of 0.020 kg/s. Find: The mean velocity (u m ), maximum velocity (u MAX ), and
More informationDIRECT NUMERICAL SIMULATION OF FLUID FLOW AT SUPERCRITICAL PRESSURE IN A VERTICAL CHANNEL
DIRECT NUMERICAL SIMULATION OF FLUID FLOW AT SUPERCRITICAL PRESSURE IN A VERTICAL CHANNEL W. Wang and S. He* Department of Mechanical Engineering, The University of Sheffield, Sheffield, S1 3JD, UK *s.he@sheffield.ac.uk
More information