Browsing by Author "Allocco, Eric"
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Item Regenerative Solid Oxide Stack for Energy Storage(2023 International Conference on Environmnetal Systems, 2023-07-16) Vilekar, Saurabh; Junaedi, Christian; Hawley, Kyle; Allocco, Eric; Rehaag, JessicaPrecision Combustion, Inc. (PCI), with support from NASA, continues to develop unitized, regenerative solid oxide stack system. The technology has been previously demonstrated for power generation with methane reformate and efficient co-electrolysis of H2O and CO2 for energy storage. Challenges and risks regarding carbon deposition and thermal management associated with internal reforming have already been addressed. Advantages include potential to provide high power density, improve reliability, and enable quick cycling between power generation and electrolysis. Durability over multiple cycles and several hundreds of hours of operation has been proven. Prior experimental validation comprised utilizing air on the oxidant side of the solid oxide stack. With NASA support, PCI is advancing stack validation and evaluation for air-independent operation to enable implementation of the regenerative stack technology in future NASA missions to the moon, near-Earth asteroids, and Mars. In this paper, we describe continued developmental efforts undertaken at PCI to experimentally demonstrate a regenerative solid oxide stack capable of air-independent operation for use in In-Situ Resource Utilization applications for future NASA lunar and/or Martian missions.Item Unitized Regenerative Solid Oxide Stack(49th International Conference on Environmental Systems, 2019-07-07) Vilekar, Saurabh; Junaedi, Christian; Allocco, Eric; Gao, Zhan; Roychoudhury, SubirEnergy storage and production in space via In-Situ Resource Utilization (ISRU) is critical for expanding robotic and human extraterrestrial exploration beyond low earth orbit where re-supply options are nonexistent. Traditional system configurations, in conjunction with photovoltaic solar arrays, comprise two separate systems: 1) fuel cell to convert fuel (e.g., H2) into electricity and 2) electrolyzer to produce O2 and fuel via electrolysis of in-situ resources. Development of Unitized Regenerative Solid Oxide (UR-SOC) Stack for providing both power and utilizing in-situ resources (e.g., H2O and CO2 for Mars mission) has the potential to provide high power density, improve reliability, and enable quick cycling between power generation and electrolysis within an integrated and process-intensified ISRU. Precision Combustion, Inc. (PCI), with support from NASA, has been developing a unitized regenerative solid oxide stack system. In this paper, we will present results from preliminary performance characterization of the UR-SOC and system concept design for diurnal operation. Capability for direct internal reforming of regolith off-gases (e.g., CH4 and higher hydrocarbons) within a solid oxide stack will also be presented.