use of the thompson wind tunnel data set – a few examples
DESCRIPTION
Use of the Thompson wind tunnel data set – a few examples. Ruwim Berkowicz and Helge Rørdam Olesen. Excel workbooks. The subsequent charts are copied from Excel workbooks that are freely available through http://www.dmu.dk/International/Air/Models/Background/Thompson_Intro.htm - PowerPoint PPT PresentationTRANSCRIPT
National Environmental Research Institute, University of Aarhus, Denmark
Use of the Thompson wind tunnel data set – a few examples
Ruwim Berkowicz and Helge Rørdam Olesen
National Environmental Research Institute, University of Aarhus, Denmark
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Excel workbooks
• The subsequent charts are copied from Excel workbooks that are freely available through
• http://www.dmu.dk/International/Air/Models/Background/Thompson_Intro.htm
• • Each workbook contains a chart, depicting a stack, a
building and a concentration profile. • This chart is dynamic, so the user can vary the stack
height or the stack location (using arrow keys in Excel).
• The chart shows the resulting changes in concentrations according to both measurements and models.
National Environmental Research Institute, University of Aarhus, Denmark
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Layout of chart: Sketch of stack and building
Hs=150 Hb=150 Wb=150 Lb=150
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Xs=-150 AerMod Xs=-150 OML Xs=-150 no building AerMod no building OML no building
Wind
Full-drawn black curve: Measured concentration at ground-level along a line through the center of the building.
Both stack and building height is 150 units.
National Environmental Research Institute, University of Aarhus, Denmark
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The chart holds curves modelled by several models: AERMOD and OML (standard version).Dashed curves refer to situation without building
Wind
Hs=150 Hb=150 Wb=150 Lb=150
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Xs=-150 AerMod Xs=-150 OML Xs=-150no building AerMod no building OML no building
National Environmental Research Institute, University of Aarhus, Denmark
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Cube building
• The stack is at roof height.• We move the stack relative to the building.
• In the Excel sheet, the building can be moved by simply pressing an arrow key.
• The subsequent slides mimic the way the Excel sheets work.
National Environmental Research Institute, University of Aarhus, Denmark
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First, the building is 10 building heights downwind of the stack
Hs=150 Hb=150 Wb=150 Lb=150
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-1500 -1000 -500 0 500 1000 1500 2000 2500 3000
Xs=-1500 (.missing.) (.missing.)no building AerMod no building OML no building
National Environmental Research Institute, University of Aarhus, Denmark
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Moving closer: Watch Xs, indicating distance from the building’s upwind face to the stack, counted positive along X axis
Hs=150 Hb=150 Wb=150 Lb=150
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-1500 -1000 -500 0 500 1000 1500 2000 2500 3000
Xs=-1200 (.missing.) (.missing.)no building AerMod no building OML no building
XS
National Environmental Research Institute, University of Aarhus, Denmark
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Hs=150 Hb=150 Wb=150 Lb=150
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0.5
1
1.5
2
2.5
-1500 -1000 -500 0 500 1000 1500 2000 2500 3000
Xs=-900 AerMod Xs=-900 (.missing.)no building AerMod no building OML no building
XS
National Environmental Research Institute, University of Aarhus, Denmark
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Hs=150 Hb=150 Wb=150 Lb=150
0
0.5
1
1.5
2
2.5
-1500 -1000 -500 0 500 1000 1500 2000 2500 3000
Xs=-600 (.missing.) (.missing.)no building AerMod no building OML no building
National Environmental Research Institute, University of Aarhus, Denmark
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Hs=150 Hb=150 Wb=150 Lb=150
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0.5
1
1.5
2
2.5
-1500 -1000 -500 0 500 1000 1500 2000 2500 3000
Xs=-300 AerMod Xs=-300 OML Xs=-300no building AerMod no building OML no building
National Environmental Research Institute, University of Aarhus, Denmark
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Hs=150 Hb=150 Wb=150 Lb=150
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0.5
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1.5
2
2.5
-1500 -1000 -500 0 500 1000 1500 2000 2500 3000
Xs=-150 AerMod Xs=-150 OML Xs=-150no building AerMod no building OML no building
National Environmental Research Institute, University of Aarhus, Denmark
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Hs=150 Hb=150 Wb=150 Lb=150
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1.5
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-1500 -1000 -500 0 500 1000 1500 2000 2500 3000
Xs=0 AerMod Xs=0 OML Xs=0no building AerMod no building OML no building
National Environmental Research Institute, University of Aarhus, Denmark
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Hs=150 Hb=150 Wb=150 Lb=150
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1.5
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-1500 -1000 -500 0 500 1000 1500 2000 2500 3000
Xs=75 AerMod Xs=75 OML Xs=75no building AerMod no building OML no building
National Environmental Research Institute, University of Aarhus, Denmark
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Hs=150 Hb=150 Wb=150 Lb=150
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0.5
1
1.5
2
2.5
-1500 -1000 -500 0 500 1000 1500 2000 2500 3000
Xs=150 AerMod Xs=150 OML Xs=150no building AerMod no building OML no building
National Environmental Research Institute, University of Aarhus, Denmark
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Hs=150 Hb=150 Wb=150 Lb=150
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0.5
1
1.5
2
2.5
-1500 -1000 -500 0 500 1000 1500 2000 2500 3000
Xs=300 AerMod Xs=300 OML Xs=300no building AerMod no building OML no building
National Environmental Research Institute, University of Aarhus, Denmark
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Hs=150 Hb=150 Wb=150 Lb=150
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1.5
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-1500 -1000 -500 0 500 1000 1500 2000 2500 3000
Xs=600 AerMod Xs=600 (.missing.)no building AerMod no building OML no building
National Environmental Research Institute, University of Aarhus, Denmark
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Hs=150 Hb=150 Wb=150 Lb=150
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1.5
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2.5
-1500 -1000 -500 0 500 1000 1500 2000 2500 3000
Xs=900 AerMod Xs=900 (.missing.)no building AerMod no building OML no building
National Environmental Research Institute, University of Aarhus, Denmark
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Hs=150 Hb=150 Wb=150 Lb=150
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0.5
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1.5
2
2.5
-1500 -1000 -500 0 500 1000 1500 2000 2500 3000
Xs=1200 (.missing.) (.missing.)no building AerMod no building OML no building
National Environmental Research Institute, University of Aarhus, Denmark
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Hs=150 Hb=150 Wb=150 Lb=150
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0.5
1
1.5
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2.5
-1500 -1000 -500 0 500 1000 1500 2000 2500 3000
Xs=1500 (.missing.) (.missing.)no building AerMod no building OML no building
National Environmental Research Institute, University of Aarhus, Denmark
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Effect of changing stack height
• We consider a stack located at the center of the roof.
• The building is a cube
National Environmental Research Institute, University of Aarhus, Denmark
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Stack at roof top (Hs = Hb)
Hs=150 Hb=150 Wb=150 Lb=150
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-1500 -1000 -500 0 500 1000 1500 2000 2500 3000
Xs=75 AerMod Xs=75 OML Xs=75no building AerMod no building OML no building
National Environmental Research Institute, University of Aarhus, Denmark
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Elevated stack (Hs = 1.5 Hb)
Hs=225 Hb=150 Wb=150 Lb=150
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-1500 -1000 -500 0 500 1000 1500 2000 2500 3000
Xs=75 AerMod Xs=75 OML Xs=75no building AerMod no building OML no building
National Environmental Research Institute, University of Aarhus, Denmark
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Even higher stack: Hs = 2 Hb
Hs=300 Hb=150 Wb=150 Lb=150
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1.5
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-1500 -1000 -500 0 500 1000 1500 2000 2500 3000
Xs=75 AerMod Xs=75 OML Xs=75no building AerMod no building OML no building
National Environmental Research Institute, University of Aarhus, Denmark
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Effect of changing building width – stack height 1.5 Hs
National Environmental Research Institute, University of Aarhus, Denmark
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Cube – measurements only
Hs=225 Hb=150 Wb=150 Lb=150
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-500 0 500 1000 1500 2000 2500 3000
Xs=75 AerMod Xs=75 OML Xs=75no building AerMod no building OML no building
National Environmental Research Institute, University of Aarhus, Denmark
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Wide building (2 cubes)
Hs=225 Hb=150 Wb=300 Lb=150
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-500 0 500 1000 1500 2000 2500 3000
Xs=75 AerMod Xs=75 OML Xs=75no building AerMod no building OML no building
National Environmental Research Institute, University of Aarhus, Denmark
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Very wide (4 cubes)
Hs=225 Hb=150 Wb=600 Lb=150
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-500 0 500 1000 1500 2000 2500 3000
Xs=75 AerMod Xs=75 OML Xs=75no building AerMod no building OML no building
National Environmental Research Institute, University of Aarhus, Denmark
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Cube, including model results
Hs=225 Hb=150 Wb=150 Lb=150
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0.1
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0.5
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-500 0 500 1000 1500 2000 2500 3000
Xs=75 AerMod Xs=75 OML Xs=75no building AerMod no building OML no building
National Environmental Research Institute, University of Aarhus, Denmark
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Wide building (2 cubes)
Hs=225 Hb=150 Wb=300 Lb=150
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
-500 0 500 1000 1500 2000 2500 3000
Xs=75 AerMod Xs=75 OML Xs=75no building AerMod no building OML no building
National Environmental Research Institute, University of Aarhus, Denmark
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Very wide building (4 cubes)
Hs=225 Hb=150 Wb=600 Lb=150
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0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
-500 0 500 1000 1500 2000 2500 3000
Xs=75 AerMod Xs=75 OML Xs=75no building AerMod no building OML no building
National Environmental Research Institute, University of Aarhus, Denmark
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Continue on your own...
• Four Excel workbooks are available for download, one for each building.
• See http://www.dmu.dk/International/Air/Models/Background/Thompson_Intro.htm