Guidance

Members of NASA Jet Propulsion Laboratory (JPL) have been assisting us in understanding their system, as well as providing key insight into what direction our work should go. Alongside relevant data about their gas ingestion system intakes and a diagram of their model, NASA JPL provided us with a set of challenge questions that should be answered.

NOTE: We are not allowed to show their data or gas ingestion diagram unless given explicit permission to do so

1. With a cell volume of 0.5 L and target final fill pressure of 30 mbar, what is the range of actual pressure resulting from the range in altitude at the beginning of each ingest? 
2. What is the ideal size of a restrictor to achieve a target fill pressure over a nominal ingest period?
3. What is the effect on cell pressure of uncertainty in valve actuation time (is valve timing a significant contributor to pressure variation)? 
4. Is there a significant pressure differential along the supply line and how does altering the length of the pipe affect this analysis? 
5. What is the total mass intake (assuming 100% CO2) into the system’s pumps?

Using these questions, we have to determine important characteristics for both the mathematical and experimental models. 

1. Approximate Discharge Coefficient for comparison with the mathematical model
2. The pressure difference along the length of the supply line

1. A function for Restrictor Diameters
2. A function for Pressure Loss due to piping and other minor losses
3. Total mass intake to the pumps
4. A function to calculate Discharge Coefficient