Plate Coil Thermal Verification:
Daniel K. Inouye Solar Telescope
Michael GormanSyracuse University
The DKISTSolar Effects and Dome SeeingCarousel Cooling System
The Plate CoilTesting and AnalysisResultsFurther Recommendations
Introduction
● To observe our closest star, The Suno Solar Flareso Thermal Imagingo Plasma Analysiso Solar Impacts on Earth
“Understanding the Sun and Sun-Earth connection is crucial for understanding planetary systems (solar and extrasolar) in general.”- DKIST
Daniel K Inouye Solar Telescope
● Dome Seeing Effectso Convective Air Flowo Mirage
● Night Time Sub-Coolingo Pan-STARRSo Faulkes
Solar Effects on Viewing
● Plate Coilso Heat reactive panelso At or below ambient (at all hours of the day)o 8’ x 5’, SA-240 Steel
● Dynalene HC-20o -22°F Freezingo 230°F Boiling
● 63 Zoneso Series and Parallelo 63 SUP/RET lines
Carousel Cooling System
10:00 PM
● Set up in a similar environmento 3055 m: Altitudeo 20.71° N: Longitudeo 156.25° W: Latitude
● To confirm the theoretical designo Built to average area (40 ft2)
● Pump Systemo Booster, Chiller
Test Rig
● Angle of Attack● Solar Radiation● Ambient Temperature● Relative Humidity● Soil Temperature● Wind Velocity/Direction● Plate Coil Surface Temperature● Chiller, Supply and Return
o Temperatureo Pressureo Flow
Data Collection
MatLAB Coding
Start
Input Environment
Data
Augment Units to SI
Define Constants
Calculate Convection & Conduction
Calculate Convection Coefficients
Calculate Hydraulic Diameter
Define View Factors
Calculate Enclosure Radiation
Calculate Soil Radiation
Calculate Atmosphere
Radiation
Calculate Heat
Deposition
Calculate Heat Load
Display effectiveness of the data
Generate Graphs
End
Total Heat Deposition = Solar Radiation - Enclosure Radiation + Soil Radiation + Atmospheric Radiation
Heat Load = Mass Flow * Specific Heat * Temperature * Density△
Equations
● The design and test rig hoses were set up differently
● I noticed that the supply and return hoses were swapped on the test rig
● Tests were done comparing the two of them to observe differences
Notes
● 23% Error from modeled data○ Assumptions done in modeled data○ 23% more heat load predicted to be removed
● Disparity in data between July 1st, 2003 and July, 2015
● Actual Heat Loads Modeled Heat Loads ⋡○ Chiller too small for the Plate coil.
Results
Results
Date Heat Deposition [kW]
Heat Load [kW] Ambient / Skin Temp [ºC]
4/2014 0.769 3.56 32.25 / 33.04
9/5/2014 0.916 1.65 13.59 / 17.825
2/23/2015 0.666 1.30 14.01 / 16.08
6/30/2015 0.767 2.22 13.5 / 15.83
7/1/2015 0.735 2.07 12.69 / 14.48
7/15/2015 0.777 1.51 13.81 / 17.84
● NOTE: These are all averaged values for that data set. ● No major difference between hose swapping
● Settle on a singular piping material● Record additional data
○ Various weather possibilities○ Late night testing
● Larger Chiller○ Set to a colder temperature (Ambient - 10
degrees)
Further Analysis/ Recommendations
Acknowledgements:● Chriselle Galapon● LeEllen Phelps● Guillermo Montijo Jr.● The DKIST Staff● The Akamai Internship Program
Thank You
The 2015 Akamai Internship Program is part of the Akamai Workforce Initiative, in partnership with the Univ. of California, Santa Cruz; the Univ. of Hawai'i Institute for Astronomy; and the Thirty Meter Telescope (TMT) International Observatory. Funding is provided by the Air Force Office of Scientific Research (FA9550-10-1-0044); Univ. of Hawai'i; and TMT International Observatory."
The research reported herein is based in part on data collected with the Daniel K. Inouye Solar Telescope (DKIST), a facility of the National Solar Observatory (NSO). NSO is funded by the National Science Foundation under a cooperative agreement with the Association of Universities for Research in Astronomy, Inc
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