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| Name | Leveraging Phase Change for CubeSat Propellant Positioning |
| Video Uploader | Video From Low-Gravity Science and Technology Laboratory |
| Upload Date | This Video Uploaded At 18-01-2024 15:54:50 |
| Video Discription | Samuel T. Hart, Glenn Lightsey, and Álvaro Romero-Calvo 2024 AIAA SciTech Forum, Orlando, FL CubeSat propulsion imposes unique propellant management issues. The requisite form factor often necessitates conformal tank geometries and high-density two-phase propellants. Fluid management in these saturated propellant systems cannot be accomplished using conventional capillary devices, and current state-of-the-art alternatives are volumetrically inefficient. Recently, approaches based on thermal phase change have been proposed. In these phase-change propellant management devices (PMDs), the propellant is vaporized in one portion of the tank through the application of heat and condensed in cooler portions due to increased pressure. This paper describes preliminary hardware tests used to characterize the performance of a CubeSat-scale thermal-phase-change PMD. Experimental results show that a patch heater is capable of repositioning a 15 cm3 vapor bubble in a ∼1U Nylon-CF10 tank containing R-236fa in 120 and 65 seconds using 3.3 and 6.8 W of input heat power, respectively. At least an order of magnitude increase in required time is observed when an aluminum tank is used, likely due to the thermal conductivity of the material. Lessons learned from this test series, including the importance of heater positioning and tank material, are described and applied to the design of future systems. |
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