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Notes from IEEE:

- change in temperature less than 2K across tank [nearly isothermic] 

-24 hour turnover rate of fluid from cryogenic pump

• Sensors:
  • Static 
  • Floating around 

Would a moving sensor affect the thermodynamics/temperature of the liquid?

Look into: 

• https://www.realpars.com/blog/thermocouple Thermocoupling 
• What homogeneous temperature are we trying to achieve? [so that we know what temperature the sensors have to withstand]
• Is cost an important factor to the sensor?
• What is the goal of the sensor suites across the multiple tests?

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  • Is it measuring temperature for all of them 
• Optimal Placements
  • Within physical mixing device (minimize the # of extra sensors within the tank]
• Understand what each test is doing c

Tests our sensor setups have to perform in:

• Cryocooler Performance Test
• Baffle & Pump Cryogenic Flow Test 
• Thermal Subsystem Demo 
• Mixing Subsystem Demo 

Thermal Subsystem Demo: 

Testing whether a cryogenic tank wrapped in insulation and cooled by a cryocooler can keep its liquid from boiling away in a space-like vacuum environment.

How-to-test:

• Boil-off flow: mass-flow meter on vent line (gas phase)

• Mass loss: weigh the filled tank before/after

• Level sensor (capacitance/RTD stack) to track liquid height over time

• Temperatures: many thermocouples on tank wall, loop inlet/outlet, MLI outer surface, heater panels

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