research and developments in modularizing hvac elements for … · 2011. 6. 15. · ‣openfoam...
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Research and Developments in Modularizing HVAC Elements for
CFD Software
Masashi IMANO
The University of Tokyo, Japan The Open CAE Society of Japan
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Outline
1. Introduction
2. What is “CFD parts”?
3. CFD analysis using “CFD parts”
4. The Open CAE society of Japan
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1. Introduction
2. What is “CFD parts”?
3. CFD analysis using “CFD parts”
4. The Open CAE society of Japan
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Introduction‣CFD in the design of HVAC (Heating, Ventilating, and Air Conditioning) system✓More and more important these days‣For most HVAC design engineers✓CFD is still difficult!✓Reproducing complex HVAC elements‣anemostat air diffuser‣four-way cassette type outlet, etc.
‣To use HVAC elements more easily in CFD ✓very important to be solved
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Introduction (contʼd)
‣Academic committee has been established in Japan ✓R&D in modularizing HVAC elements into “CFD parts”✓to make it more usable for HVAC design engineers‣“CFD parts” is a package✓information✓geometry data✓boundary data✓field data➡for reproducing HVAC elements in CFD
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CFD Parts
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<CAEData xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../Schema/CAEdata.xsd" type="SimulationInput" version="0.1" byte_order="LittleEndian"> <Name lang="en">Anemostat type diffuser (Box method, heating)</Name>
‣The main file in CFD parts✓described in XML format
✓designed to share among various CFD software
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Academic committee‣Subcommittee of Integration of BIM and Modularization of HVAC Elements for CAE Software✓part of SHASE (the Society of Heating, Air-Conditioning and Sanitary Engineers of Japan)✓now making out• draft of this CFD parts format• guideline for making and use of CFD Parts✓Commercial CFD software vendors in this committee
(2009 - 2010)
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1. Introduction
2. What is “CFD parts”?
3. CFD analysis using “CFD parts”
4. The Open CAE society of Japan
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What is “CFD Parts”?CFD parts is a package of information, geometry, boundary and field data file for reproducing HVAC element in CFD
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Structure of a CFD Parts
main.xmlthumbnail.pnggeometry.vtpmodelledGeometry.vtpmodelledBoundaryWall.vtpoutlet1.vtpoutlet2.vtpoutlet3.vtpoutlet4.vtpinlet.vtp
FourWayCassetteTypeOutletsVertical.cae (zipped file)
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Schema of XML file
e.g. velocity
e.g. “outlet no.1”
e.g. fixedValue,zeroGradient
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1. Introduction
2. What is “CFD parts”?
3. CFD analysis using “CFD parts”
4. The Open CAE society of Japan
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Anemostat air diffuser
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CFD parts of anemostat air diffuser
Locationof anemostat
Inlet
CFD partsAnemostat
Prof. Momoi and Prof. Kotani in Osaka University measured in detail and modelled with box method (2001)
Real shape
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Current status of CFD software
FlowDesigner(read natively)
STREAM(converter)
WindPerfectDX(converter)
OpenFOAM+xmlCFD(utility for mapping boundary conditions)
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Four-way cassette type outlet
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Measurement by PIV(Particle Image Velocimetry)
Laser HeadCamere
System Hub PCLaser Controller
Seeding Generator
Section 4 Section 3 Section 5(x=200mm)
Section 2 Section 1(central, x=0mm)
150mm
200mm
PIV measurement system
Measurement area
Measurement sections
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計測結果:水平吹き
○速度ベクトルを平均
○吹き出し角度:約30度
断面3 断面4 断面5
断面1 断面2
断面1(中央断面,x=0mm)
断面5(x=200mm)
PIV measurement results of velocity
Flow direction: Horizontal
U [m/s]Section 1 Section 2
Section 3 Section 4 Section 5
Section 5 (x=200mm)
Section 1 (x=0mm)
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Creating CFD parts
Modeled withbox method
Real shape &Measured results
Modeled shape &boundary conditions
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CFD analysis using CFD parts
1.5[m]
1.5[m]
1.5[m]
Symmetry boundary
Calculation domain:1/4 of full domain
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Correlation of wind velocity between measurement and CFD
-1
0
1
2
3
4
5
6
-1 0 1 2 3 4 5 6
Velo
city
(CFD
) [m
/s]
Velocity (Measurement) [m/s]
R2(w)=0.916R2(v)=0.852
-2
-1
0
1
2
3
4
5
6
-2 -1 0 1 2 3 4 5 6Ve
loci
ty (C
FD) [
m/s
]Velocity (Measurement) [m/s]
R2(w)=0.876R2(v)=0.744
Wind direction: Horizontal
Wind direction:Vertical
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OpenFOAM analysis using CFD partsCFD parts
xmlCFD(Utility for
mapping boundary conditions from
CFD parts)
!"#$"%&'(%"
)"*&+,"-.(#/0/'1
234
56!7
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Future works
‣Fix format of CFD parts‣Create more and more CFD parts under cooperation with several air-conditioning and air supply outlet manufacturers‣Create Web site for distributing CFD parts‣Publish OpenFOAM utility‣Other CFD software
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1. Introduction
2. What is “CFD parts”?
3. CFD analysis using “CFD parts”
4. The Open CAE society of Japan
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The Open CAE Society of Japan
‣Established: since Nov 2009‣Members: 107 (Including 6 supporting member and 12 student member)‣Workshop: Two times a year‣Japanese translation of user guide‣Hands on seminar: OpenFOAM, ParaView, Blender, etc.
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Open CAE Workshop@University of Tokyo
80-100 attendees
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Japanese translation
‣OpenFOAM User guide 1.7.1‣OpenFOAM Programmer’s guide ‣The ParaView Tutorials
(a.k.a. SC08-09 ParaView Tutorials)‣ESP-r (Building simulation)
Open FOAMオープンソース ツールボックス
ユーザガイド和訳
一般社団法人 オープン 学会
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‣Established: since June 2010‣OpenFOAM Study Meetings: in Tokyo and Osaka‣Open Source CAE Study Meeting: in Gifu✓OpenFOAM, Paraview, Salome-Meca, Blender, etc.‣Ustream broadcasting and recording: in Tokyo
Monthly Open Source CAE Study Meetings in Japan
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See you at OpenFOAM workshopin Japan someday!
Thank you!
Any questions?
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