Browsing by Author "Coker, Robert F."
Now showing 1 - 2 of 2
- Results Per Page
- Sort Options
Item Computer Simulation and Modeling of CO2 Removal Systems for Exploration(45th International Conference on Environmental Systems, 2015-07-12) Coker, Robert F.; Knox, James; Schunk, Greg; Gomez, CarlosThe Atmosphere Revitalization Recovery and Environmental Monitoring (ARREM) project was initiated in September of 2011 as part of the Advanced Exploration Systems (AES) program. Under the ARREM project and the follow-on Life Support Systems Project (LSSP), testing of sub-scale and full-scale systems has been combined with multiphysics computer simulations for evaluation and optimization of subsystem approaches. In particular, this paper will describe the testing and 1-D modeling of the combined water desiccant and carbon dioxide sorbent subsystems of the carbon dioxide removal assembly (CDRA), as well as initial 3-D modeling and test validation approaches for vacuum desorption. The goal is a full system predictive model of CDRA to guide system optimization and development.Item Designing for Powered Flight on Titan: Preliminary Testing and Analysis of a Thermal Control Design for the Dragonfly Battery Module(51st International Conference on Environmental Systems, 7/10/2022) Balakrishnan, Krithika; Holtzman, G. Allan; Parkus, James E.; Coker, Robert F.; Jeong, Daniel Y.; Ercol, Carl J.Dragonfly is a rotorcraft lander that will explore a variety of surface locations on Saturn's moon Titan. During powered flight, the Dragonfly lander will draw power from a 24-cell battery system. Due to the cryogenic atmosphere on Titan, the Dragonfly lander will be insulated with Rohacell around the exterior surfaces � however, this poses a unique design challenge for powered flight, as the battery and other components need to be kept cool while they dissipate significant heat during this phase. In order to assess a thermal control design to cool the battery system during powered flight within the insulated lander, a sub-scale 9-cell thermal module was tested at the Johns Hopkins Applied Physics Laboratory. The results demonstrate the importance of having both passive and active thermal controls.