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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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A2.5 THz Receiver Front-End for Spaceborne Applications
The OH radical is an important player in known ozone depletion cycles; however, due to its location in the atmosphere, it must be studied from either a balloon or spaceborne platform.
Planar Diode Solid State Receiver for 557 GHz with State-of-the-Art Performance
We report on a subharmonic mixer with a broad IF bandwidth that has been developed for the Microwave Instrument for the Rosetta Orbiter (MIRO) to study water transition lines occurring near 557 GHz.
Lunar Multi-GNSS Receiver
Operational use of GPS has been demonstrated half-way to the moon on the Magnetospheric Multiscale (MMS) mission. Lunar GNSS feasibility has been demonstrated through high fidelity simulations conducted by the Space Communications and Navigation (SCaN) program.
Navigation Performance Trades and Analysis for the Lunar GNSS Receiver Experiment (LuGRE)
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Mars Sample Receiving Facility Research and Development to Enable Preservation, Safe Containment, and Scientific Research of Martian Samples on Earth
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Mars Sample Return (MSR) Sample Receiving Facility (SRF) Assessment Study
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NavCube3-mini Lunar GNSS Receiver
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u ltra-High Temperature SiC-matrix Solar Thermal Air Receiver (HOTSSTAR), Enabled by Additive Manufacturing
Progress report on the design and initial on-sun test results of HOTSSTAR
The tradeoff between noise, data rate, and power consumption of transimpedance amplifiers for optical receivers
Not provided.
Inter-facility transfer for patients with acute large vessel occlusion stroke receiving mechanical thrombectomy
Not Available
Impact of molten salt inflow on the temperature distribution in thermal energy storage tanks at startup for central receiver concentrating solar power plants
Concentrating Solar Power (CSP) systems with molten salt thermal energy storage (TES) tanks are one of the most promising, renewable-based energy conversion technologies for larger-scale power generation. The TES tank is one of the most critical components in CSP plants due to its high-temperature operation (up to 565 °C), daily thermal cycling, and intermittent solar radiation conditions. The plant startup is one of the most challenging operation conditions that could lead to damaging thermal gradients due to low salt inventory levels. In this study an analytical model for the sparger ring was developed and integrated with a detailed computational fluid dynamics model of a commercial-scaled molten salt tank. The integrated model allows an accurate representation of the tank operation to evaluate the effect of molten salt inflow on the mixing process. The tank filling process during plant startup was analyzed considering sparger rings with variations in design features, including inlet orifice configurations, number of orifices, direction of the inlets, and orifice diameter. The results demonstrated that higher temperature gradients are obtained in the tank floor during the plant startup. A sparger ring configuration with a predetermined orifice inlet inclination (30°, 45° and 60°) leads to significant temperature differences in the floor, between 57 °C and 62 °C, but better homogeneity in the temperature of the salt inventory. Lower salt inflow velocities result in a more homogeneous floor temperature, with maximum temperature differences under 38 °C. The sparger ring configuration with 52 orifices of 1-in. diameter and vertical flow showed better homogeneity in the temperature differences as a function of the salt level and lower temperature gradients in the tank floor. Because large temperature gradients in the tank's floor have been identified as one of the main factors contributing to tank failures, assessing various sparger ring design features is fundamental to determining proper inflow conditions that lead to low-temperature gradients and reducing failure susceptibility.
Interoperability of the universal WPT3 transmitter with different receivers for electric vehicle inductive charger
Not Available
Stereotactic Body Radiation Therapy for Patients With Sacral Chordoma Who Previously Received Carbon Ion Therapy
No abstract prepared.