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Contextual Compression of Large-Scale Wind Turbine Array Simulations

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Contextual Compression of Large-Scale Wind Turbine Array Simulations

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Contextual*Compression*of*Large-Scale*Wind*
Turbine*Array*Simulations*
Kenny&Gruchalla,&Nicholas&Brunhart-Lupo,&Kristi&Potter,&John&Clyne (NCAR).
The&2nd International&Workshop&on&Data&Reduction&for&Big&Scientific&Data
November&17,&2017
Denver,&Colorado
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Motivation
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Background:*Turbine*Wake*Effects
Downstream&turbines
Reduced&power&performance&(50-60%)
Higher&gearbox&forces&(30%)
Shorter&lifespans
4
Data
atmospheric simulation
>3 km
>3 km
>1 km
150m
Minimum&size:&3000m&x&3000m&x&1000m&
Uniform&grid& w/&wesolution ~1m&
~&100&GB/timestep/variable
Unstructured&“nested”&grid&
10m&atmosphere&
1m&to&capture&wake&dynamics
~4&GB/timestep/variable&+&~40&GB&of&metadata&
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Objective
Full-Fidelity&Details
Low-Fidelity&Context
Show&the&detailed&flow&of&the&turbine&wakes&in&the&context&of&the&
atmospheric&conditions.
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VAPOR
Visualization&and&Analysis&Platform&for&Ocean,&Atmosphere,&and&Solar&Researchers&&
www.vapor.ucar.edu
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Example:*Two*Turbine*Uniform*Case
3008m&x&3008m&x&1024m&@&1m&resolution
9.2&billion&cells
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48*Turbine*Case
Unstructured
grid
Uniform
grid
Mixed*Resolution*
VDC
Reconstruction
n/a
CPU
CPU
Frame
rate
*
0.5&fps
0.5&fps
Render&time
*
2s
2s
Time
to&frame
hours
360s
300s
ū
volume&size
3.9&GB
38.7&GB
3.7&GB
Metadata
size
39.9&GB
673&KB
674&KB
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Custom*GPU*Renderer
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48*Turbine*Case
Unstructured
grid
Uniform
grid
Mixed*
Resolution*VDC
Mixed*
Resolution
VDC
Reconstruction
n/a
CPU
CPU
GPU
Frame
rate
*
0.5&fps
0.5&fps
3
-12&fps
Render&time
*
2s
2s
0.08
-0.33s
Time
to&frame
hours
360s
300s
70s
ū
volume&size
3.9&GB
38.7&GB
3.7&GB
3.7&GB
Metadata
size
39.9&GB
673&KB
674&KB
674&KB
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Contextualized*Compression
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Acknowledgements
This&work&was&supported&by&the&U.S.&Department&of&Energy&and&performed&using&
computational&resources&sponsored&by&its&Office&of&Energy&Efficiency&and&Renewable&
Energy.&
This&work&was&supported&by&the&Laboratory&Directed&Research&and&Development&(LDRD)&
program&at&the&National&Renewable&Energy&Laboratory.&
Special&Thanks&to:&
Matthew&Churchfield
Patrick&Moriarty
Michael&A.&Sprague
Julie&K.&Lundquist
Sang&Lee
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