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

Final Rendering

● 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

The Plate Coil

Path of Flow

Inlet

Outlet

Flow of Dynalene

1:00 AM

4:00 AM

7:00 AM

10:00 AM

1:00 PM

4:00 PM

7:00 PM

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

Thermal Imaging

● 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

Graphical Analysis

Graphical Analysis

● 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

Thank You