Notes from IEEE:
- change in temperature less than 2K across tank [nearly isothermic]Â
-24 hour turnover rate of fluid from cryogenic pump
- Sensors:
- StaticÂ
- Floating aroundÂ
Would a moving sensor affect the thermodynamics/temperature of the liquid?
Look into:Â
- https://www.realpars.com/blog/thermocouple ThermocouplingÂ
- 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?Â
- Is it measuring temperature for all of themÂ
- 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 TestÂ
- Thermal Subsystem DemoÂ
- Mixing Subsystem DemoÂ
Thermal Subsystem Demo:Â
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