1. Plate Coil Thermal
Verification:
Daniel K. Inouye
Solar Telescope
Michael Gorman
Syracuse University

2. The DKIST
Solar Effects and Dome Seeing
Carousel Cooling System
The Plate Coil
Testing and Analysis
Results
Further Recommendations
Introduction

3. ● To observe our closest star, The Sun
o Solar Flares
o Thermal Imaging
o Plasma Analysis
o 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

4. Final Rendering

5. ● Dome Seeing Effects
o Convective Air Flow
o Mirage
● Night Time Sub-Cooling
o Pan-STARRS
o Faulkes
Solar Effects on Viewing

6. ● Plate Coils
o Heat reactive panels
o At or below ambient (at all hours of the day)
o 8’ x 5’, SA-240 Steel
● Dynalene HC-20
o -22°F Freezing
o 230°F Boiling
● 63 Zones
o Series and Parallel
o 63 SUP/RET lines
Carousel Cooling System

7. The Plate Coil

8. Path of Flow
Inlet
Outlet
Flow of
Dynalene

9. 1:00 AM

10. 4:00 AM

11. 7:00 AM

12. 10:00 AM

13. 1:00 PM

14. 4:00 PM

15. 7:00 PM

16. 10:00 PM

17. ● Set up in a similar environment
o 3055 m: Altitude
o 20.71° N: Longitude
o 156.25° W: Latitude
● To confirm the theoretical design
o Built to average area (40 ft2)
● Pump System
o Booster, Chiller
Test Rig

19. ● Angle of Attack
● Solar Radiation
● Ambient Temperature
● Relative Humidity
● Soil Temperature
● Wind Velocity/Direction
● Plate Coil Surface Temperature
● Chiller, Supply and Return
o Temperature
o Pressure
o Flow
Data Collection

20. 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

21. Total Heat Deposition = Solar Radiation -
Enclosure Radiation + Soil Radiation +
Atmospheric Radiation
Heat Load = Mass Flow * Specific Heat *
△Temperature * Density
Equations

22. ● 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. Thermal Imaging

24. ● 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

25. 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

26. Graphical Analysis

27. Graphical Analysis

28. ● 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

29. 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

30. Thank You