Materials on the International Space Station—forward technology solar cell experiment

Walters, Robert J.; Garner, J. C.; Lam, S.; Vasquez, John A.; Braun, William R.; Ruth, R. E.; Messenger, S.R.; Lorentzen, Justin; Bruninga, Robert; Jenkins, Phillip P.; Flatico, Joseph M.; Wilt, David M.; Piszczor, Michael F.; Greer, Lawrence C.; Krasowski, Michael J.

doi:10.1016/j.mseb.2004.06.025

Cited by 18 publications

(6 citation statements)

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“…Among aramid fibers, Vectran [71] was selected for the construction of high-strength fabrics of the inflatable plug. Vectran is commonly used in aerospace applications where high-strength, high foldability with minimum degradation is required [72][73][74][75][76][77][78][79][80][81][82][83]. Phase 2 provided much useful information regarding deployment and initial inflation characteristics, but it culminated with a failure of the full-scale, single-layer Vectran fabric plug.…”

Section: Results Of Experimental Evaluationsmentioning

confidence: 99%

Large-scale inflatable structures for tunnel protection: a review of the Resilient Tunnel Plug project

Sosa

Thompson

Holter

et al. 2020

J Infrastruct Preserv Resil

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The protection of underground civil infrastructure continues to be a high priority for transportation and transit security agencies. In particular, rail transit tunnels running under bodies of water are susceptible to disruptions due to flooding caused by extraordinary climatic events such as hurricanes or other events resulting from human activities. Several events have taken place in the past decades that have demonstrated the need to mitigate vulnerabilities or, at least, minimize the consequences of catastrophic events. Although it is impossible to prevent all situations that can lead to flooding, damage can be substantially decreased by reducing the area affected by the event. To minimize the effects of an event, a possible approach is to compartmentalize the tunnel system by creating temporary barriers that can contain the propagation of flooding until a more permanent solution can be implemented. One way to create a temporary barrier is by the deployment of a large-scale inflatable structure, also known as an inflatable plug. In such an application, the inflatable structure is prepared for placement, either permanently or temporally, and maintained ready for deployment, inflation, and pressurization when needed. The internal plug pressure imparts a normal force against the tunnel wall surface with the friction between the plug and tunnel surfaces opposing axial movement of the plug. The sealing effectiveness depends on the ability of the inflatable structure to self-deploy and fit, without human intervention, to the intricacies of the perimeter of the conduit being sealed. Primary design constraints include having the plug stowed away from the dynamic envelope of the trains and being able to withhold the pressure of the flooding water. This work presents a compilation of the main aspects of the activities completed for the development of large-scale inflatable structures as part of the Resilient Tunnel Plug (RTP) Project. The main test results and lessons learned are presented to demonstrate the viability of implementing large-scale inflatable plugs for the containment of flooding in rail tunnels systems. Over 400 coupon and specimen tests, 200 reduced scale tests, and 100 full-scale tests were conducted to demonstrate the efficacy of the design of different prototypes over a 10-year research and development project. The culmination of the work was 12 large-scale flooding demonstrations where the inflatable tunnel plug was shown able to be deployed remotely and withstand a simulated flooding event.

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Section: Results Of Experimental Evaluationsmentioning

confidence: 99%

Large-scale inflatable structures for tunnel protection: a review of the Resilient Tunnel Plug project

Sosa

Thompson

Holter

et al. 2020

J Infrastruct Preserv Resil

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“…These devices were evaluated before flight in the solar cell measurement labs at GRC, and will be reevaluated following their return to earth. The Mobile and Remote Sensing Laboratory (MARS Lab) team at GRC was tasked with the development of the data acquisition system for the active side of the experiment, as team members had participated in previous space PV measurement experiments including MISSE 5, 7 and 8 [1]- [3]. The team designed, built, and delivered the flight hardware on an extremely accelerated timeline during December of 2013 and January of 2014.…”

Section: Introductionmentioning

confidence: 99%

Further Analyses of the NASA Glenn Research Center Solar Cell and Photovoltaic Materials Experiment onboard the International Space Station

Myers

Prokop²,

Krasowski³

et al. 2016

14th International Energy Conversion Engineering Conference

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Accurate air mass zero (AM0) measurement is essential for the evaluation of new photovoltaic (PV) technology for space solar cells. The NASA Glenn Research Center (GRC) has flown an experiment designed to measure the electrical performance of several solar cells onboard NASA Goddard Space Flight Center's (GSFC) Robotic Refueling Mission's (RRM) Task Board 4 (TB4) on the exterior of the International Space Station (ISS).Four industry and government partners provided advanced PV devices for measurement and orbital environment testing. The experiment was positioned on the exterior of the station for approximately eight months, and was completely selfcontained, providing its own power and internal data storage. Several new cell technologies including four-junction (4J)Inverted Metamorphic Multi-junction (IMM) cells were evaluated and the results will be compared to ground-based measurement methods.Index Termsair mass zero, international space station, low earth orbit environment, photovoltaic cells, solar cell calibration.https://ntrs.nasa.gov/search.jsp?R=20170001287 2020-07-05T13:43:19+00:00Z

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“…Eight pin-ondisk tribometers were designed, constructed, and flown as part of the seventh Materials on the International Space Station Experiments (MISSE 7) platform. MISSE 7 is the seventh of a series of experiments designed to provide the community with a platform to perform experiments in the harsh low earth orbit (LEO) environment [3][4][5]. This ambitious seventh MISSE program includes several active experiments, which actively collect data on orbit and many passive experiments (exposure experiments that are analyzed in the lab upon mission completion with no active data acquisition on orbit) including solar arrays, tribometers, optical samples, spectrometers, and others [6].…”

Section: Introductionmentioning

confidence: 99%

Space Tribometers: Design for Exposed Experiments on Orbit

Krick

Sawyer

2010

Tribol Lett

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Eight pin-on-disk tribometers have been made for testing materials in space on board the International Space Station. They will be exposed directly to the low earth orbit (LEO) environment on board the ''Materials on the International Space Station Experiments'' platform where they will experience extreme conditions including atomic oxygen, ultrahigh vacuum, radiation (including UV radiation), and thermal ranges from -40 to 60°C. In order to survive launch and LEO, these tribometers were designed to be extremely compact, rugged, and reliable. Pin-on-disk tribology experiments are now being performed with a 13.2 mm/s sliding velocity (14 RPM at 9 mm wear track radius) and a 1 N normal load with hemispherical pin of 1.5875 mm radius. Materials tested include MoS 2 /Sb 2 O 3 /Au, MoS 2 /Sb 2 O 3 /C, YSZ/Au/MoS 2 / DLC, and SiO-doped DLC coatings, and bulk samples of polytetrafluoroethylene (PTFE) alumina nanocomposites and gold.

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Materials on the International Space Station—forward technology solar cell experiment

Cited by 18 publications

References 0 publications

Large-scale inflatable structures for tunnel protection: a review of the Resilient Tunnel Plug project

Large-scale inflatable structures for tunnel protection: a review of the Resilient Tunnel Plug project

Further Analyses of the NASA Glenn Research Center Solar Cell and Photovoltaic Materials Experiment onboard the International Space Station

Space Tribometers: Design for Exposed Experiments on Orbit

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