SETO CSP Program Summit 2019energy.gov/solar-office
SETO CSP Program Summit 2019
THERMOPHYSICAL PROPERTY MEASUREMENTS OFHEAT TRANSFER MEDIA AND CONTAINMENT MATERIALSTopic Area 2B: Gen3 Research & Analysis
Shannon K. Yee, Assistant ProfessorAndrey Gunawan, Research Engineer IIGeorgia Institute of Technology
SETO CSP Program Summit 2019SETO CSP Program Summit 2019
Thermophysical Property Measurements of
Heat Transfer Media(e.g., Molten Salts)
Containment Materials(e.g., high temperature alloys)
&
Thermophysical Property Database
Immersion Electrothermal
Probe
Advanced Photo-thermal Technique
Measurement Accuracy atHigh Temperatures in Corrosive Environments
SETO CSP Program Summit 2019SETO CSP Program Summit 2019
Latest Design of Immersion Probes
3
5 mm OD quartz tubes
18 mm OD outer quartz tube
~19 mm (3/4 in) OD circular quartz plate
3 mm OD quartz tubes (melted to seal the fiber)
100 micron platinum-covered
fiber
Part of the fiber remains outside of
quartz
Quartz Cap with sealed fiber (this cap will be sealed to the body of the probe as the last
step of manufacturing )
Carbon paste that attaches tungsten wire to fiber (black cylinder)
Tungsten wire that goes through probe bodyOpen
end of probe
[After-deposition][Before-deposition]1a) Deposit metal-to-fiber
…or, ”2-tubes” configuration
2) Seal metal coated fiber by “fully encased” in glass
3) Seal into this ”cap”
4) Connect the “cap” onto glass “floret”
SETO CSP Program Summit 2019SETO CSP Program Summit 2019
Key Technical Challenges and Solutions
4
• Solutions: Next round of prototypes will be a linear combination of heater line and sealing methods in each column
Heater Line
Sealing Method
Lower Temperatures (< 800 °C) Higher Temperatures (> 800 °C)
Borosilicate and Platinum Quartz and MolybdenumCeramic fiber with Pt coating Ceramic fiber with Mo coating
Silica fiber with Pt coating Mo wire
Fully encased Fully encased
2-tubes 2-tubes
SETO CSP Program Summit 2019
• Proposed electrothermal immersion probe sensor can become the standard characterization technique at temperatures >700 oCo Addresses key challenges present in current state-of-the-art techniques
• The modified Xenon flash technique could serve to benchmark high temperature characterization of solidso Versatility - its can be useful for other high temperature applications
Innovation and Impact
5
Steady-state techniques Transient techniques(time domain)
Transient techniques(frequency domain)
1D reference bar (ASTM D5470)
Radial heat flow method
Guarded hotplate (ASTM D1518)
DC thermal bridge method
Transient hot-wire (THW)
Time-domain thermoreflectance
Laser flash method
Transient plane source
3-omega
Frequency-domain thermoreflectance
Pulsed power technique
SETO CSP Program Summit 2019
• Bettina K. Arkhurst (Grad student)
• Sonja Brankovic (Grad student)
• Andrey Gunawan (co-PI)
• Shannon K. Yee (PI)
• Scalable Thermal Energy Engineering Laboratory
• .
Project Team & Facilities
6
(heat.gatech.edu)
SETO CSP Program Summit 2019energy.gov/solar-office
SETO CSP Program Summit 2019
Additional slides
SETO CSP Program Summit 2019SETO CSP Program Summit 2019
Preliminary Thermal Diffusivity Datasetof NIST Standards
8
0
10
20
30
40
50
60
70
80
0 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300
Ther
mal
Diff
usiv
ity (m
m2 /
s)
Temperature (°C)
POCO GraphitePOCO Graphite NetzschTungstenTungsten NetzschMolybdenumMolybdenum NetzschIn-600In-600 NetzschPyroceram 9606Pyroceram 9606 Netzsch
SETO CSP Program Summit 2019SETO CSP Program Summit 2019
In-House Probe Leadscrew Mechanism
