Tech Briefs

Expendable Cooling System for Venus Lander Concept

The concept could be applicable to the trucking industry to provide temporary cooling where power is not readily available. NASA’s Jet Propulsion Laboratory, Pasadena, California This innovation is a concept for a novel thermal architecture that would enable a day-long surface mission on Venus. A Venus lander mission could last much longer than a few hours on the surface of the planet by absorbing heat from the Venus environment, and from the electronics within the lander, by using an expendable fluid cooling system. The fluid would evaporate in the structural shell, absorbing heat coming from the ambient environment, keeping the shell relatively cool compared to the ambient temperature. The evaporating fluid would create a liquid flow from a reservoir used to cool electronic components within the lander. The liquid reservoir must be contained within the lander structure to serve as a heat sink to maximize the lander lifetime on the surface. A pressure tank would be used to bring the fluid to a point where it could boil and vent into the Venus atmosphere.

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Rapid Quench Furnace for Processing Powder in an Inert Environment

The system is able to process particles and/or powder, preserving inert environmental conditions throughout. Langley Research Center, Hampton, Virginia Ongoing work in the development and characterization of sensory materials requires the development of shape memory alloy (SMA) powder or particles. These are embedded in structural material so that the progression of localized damage that occurs during fatigue crack growth will produce an audible acoustic emission (AE) as the SMA transforms from an austenite phase to a martensite phase. In order to set the shape memory effect in these particles, the SMA must be solution-treated (ST) to produce the austenite phase, and rapidly quenched to or below room temperature to preserve the austenite phase at room temperature.

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Field Excavator with Embedded Force Measurement

The use of load sensing in excavation allows a vehicle to excavate without exceeding safe operating loads, and without doing unnecessary work. John H. Glenn Research Center, Cleveland, Ohio The Centaur 2 (C2) platform is a compact vehicle with four independently steered and actuated wheel pods, allowing the vehicle to pivot in place and tilt in two directions. It is designed to interface with and carry the anthropomorphic robot torso of Robonaut 2. There are two nearly identical interface mounting locations on opposite sides of the vehicle body; each provides both power and data channel access. To explore soil-moving capabilities of this versatile platform, an articulated excavator was required for transporting raw material (soil) to an analog volatile extraction processor.

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Lightweight, Flexible, Energy-Manageable Polymer Nanocomposites

Applications include solar power panels on aircraft wings or building roofs, and in hybrid car engines. Langley Research Center, Hampton, Virginia Solar energy has attracted keen attention because it is a unique, clean, and sustainable energy resource. It is also widely utilized as a power source in space exploration. A lightweight, durable, deployable, and highly efficient all polymer-based solar power panel was developed comprising a highly efficient thermoelectric conducting polymer composite layer and highly efficient solar absorbance/passive cooling coatings for maximizing efficiency of the power conversion.

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Nanocomposites for Radiation Shielding

Langley Research Center, Hampton, Virginia Currently, lead and lead-based materials are used to fabricate shields not only for X-rays, but also for other types of radiation. With the growing environmental concern about the toxicity of lead, and the high costs associated with transporting heavy lead-based shields in spacecraft, alternatives are needed for fabricating X-ray shields that are less toxic and lighter.

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Advanced Protective Coatings for Graphite Substrates

This innovation enables application of graphite components in a hydrogen environment at very high temperatures. John H. Glenn Research Center, Cleveland, Ohio The purpose of this innovation is to develop advanced multilayered coating architectures to protect graphite substrates from hot hydrogen attack. The concept consists of coating the graphite substrate with metallic and non-metallic layers consisting of ZrC; Nb, Mo, and/or Nb-Mo alloy; and/or Mo2C.

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DC Transformer

This transformer can fill a role in which DC conversion potential, coupled with power filtering/storage capability, is required in high-DC power transmission. John F. Kennedy Space Center, Florida A component-level DC transformer was developed in which no alternating currents or voltages are present. It operates by combining features of a homopolar motor and a homopolar generator, both DC devices, such that the output voltage of a DC power supply can be stepped up (or down) with a corresponding step down (or up) in current. The DC transformer should be scalable to low-megawatt levels, but is more suited to high-current than high-voltage applications.

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