Browsing by Author "Strange, Jeremy"
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Item Evolution of an Additive Manufactured Heat Exchanger for PLSS 2.5(48th International Conference on Environmental Systems, 2018-07-08) Quinn, Gregory; Strange, Jeremy; Zaffetti, MarkThe next generation of extravehicular mobility unit (EMU) will require lightweight, high performance components in order to minimize the mass, volume and power of its portable life support system (PLSS). One component under development for this application is a gas / liquid heat exchanger that will cool the breathing gas delivered to the crewmember’s helmet. This technology has been gradually matured over the past several years. It started with a vacuum brazed compact heat exchanger used in NASA’s PLSS 2.0 and continued with two selective laser sintered heat exchangers, which were built using Inconel and titanium. This paper describes how the use of additive manufacturing has reduced weight, volume, cost, and manufacturing lead time of this line of heat exchangers. It also shows how performance test results have good agreement with the computational models.Item The Trash Compactor and Processing System Development(50th International Conference on Environmental Systems, 7/12/2021) Mesa, Jorge Ramon; Spexarth, Gary; Guinn, John; Morrison, Terrell; Strange, JeremyHistorically, trash generated on-orbit has been stored at the International Space Station (ISS) and later discarded by incineration during reentry in an expendable supply vehicle. Over the last few years a Trash Compactor and Processing System (TCPS) has been in development by Collins Aerospace for processing space mission trash. Concepts for both the prototype and flight units have been developed and undergone preliminary internal and NASA reviews successfully. A prototype has been built and tested to demonstrate the system concept and advance the Technology Readiness Level (TRL) for the higher risks components and subsystems. The TCPS evacuates the chamber, compacts the trash, recovers water via an internal distillation process, vents the toxic gases created, and sterilizes the rubbish by heating it to elevated temperatures continuously for several hours. Multiple test runs have been successfully conducted to date. The resultant compressed trash pucks, and liquid effluents were collected and tested. The results of which are discussed in this paper. In addition, this paper summarizes the development of the Collins Aerospace�s TCPS unit, with a focus on the design and testing of the ground demonstrator unit.