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- Sensors: thermocouples(mixing of fluid), pressure sensor(LN_2 boils off easily), liquid level sensor(detect sloshing and boil off), flow meter(how much fluid is being moved), IMU/accelerometer(identify periods of microgravity), voltage sensor(how much heat is added for induced stratification)
Thermal Vacuum Test:
Testing the thermal emissivity (tendency to keep the same heat energy) and outgassing (escape of boil off through the tank walls in a vacuum environment).
How-to-test:
- Heat-flux transducers/platinum resistance thermometers (RTDs) placed intermittently along the outer surface to measure thermal flux
- thermocouples to measure the temperature of the system in cryogenic conditions
- quartz crystal microbalances (QCMs)/residual gas analyzers (RGAs)/ion and Pirani vacuum gauges to detect gases escaped through the walls of the tank