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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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Thermal Stability of Oxide-Based Solar Selective Coatings for CSP Central Receivers.
Abstract not provided.
Parametric Analysis of Particle CSP System Performance and Cost to Intrinsic Particle Properties and Operating Conditions.
Abstract not provided.
OPTIMIZATION OF STORAGE BIN GEOMETRY FOR HIGH TEMPERATURE PARTICLE-BASED CSP SYSTEMS.
Abstract not provided.
Chapter 4: Solar Collectors for CSP
The following sections are included in the chapter: Parabolic Trough Concentrating Collectors; Heliostats; Dish; Linear Fresnel; Advanced Concepts - Metasurfaces; Acknowledgment; References.
2019 CSP Lifetime data CESL015 DE-EE0001556
Data set for project to model the lifetime of structural alloys in supercritical carbon dioxide at 700°-800°C. The mass change data is provided for oxidation in 500-h cycles and 10-h cycles in 0.1 and 30 MPa. After exposure, oxide thickness and depth of internal oxidation were measured at intervals from 1-10 kh. Four alloys were studied: Sanicro 25 (stainless steel) and Ni-based alloys 625, Haynes 282 and Inconel 740H.
BCS (CSP Beam Characterization System) [SWR-23-13]
The Beam Characterization System (BCS) is an image-processing tool for estimating heliostat tracking errors. A large mirror, or heliostat, reflects the sun onto a distant target. A carefully calibrated camera then takes an image of this target to capture the shape of the reflected beam. The software kit hosts a series of scripts to identify key features and run analysis on the captured images.
A novel CSP C-terminal epitope targeted by an antibody with protective activity against Plasmodium f
Explore the source record for details and available documents.
Molecular and functional properties of human Plasmodium falciparum CSP C-terminus antibodies
Human monoclonal antibodies (mAbs) against the central repeat and junction domain of Plasmodium falciparum circumsporozoite protein (PfCSP) have been studied extensively to guide malaria vaccine design compared to antibodies against the PfCSP C terminus. Here, we describe the molecular characteristics and protective potential of 73 germline and mutated human mAbs against the highly immunogenic PfCSP C-terminal domain. Two mAbs recognized linear epitopes in the C-terminal linker with sequence similarity to repeat and junction motifs, whereas all others targeted conformational epitopes in the α-thrombospondin repeat (α-TSR) domain. Specificity for the polymorphic Th2R/Th3R but not the conserved RII+/CS.T3 region in the α-TSR was associated with IGHV3-21/IGVL3-21 or IGLV3-1 gene usage. Although the C terminus specific mAbs showed signs of more efficient affinity maturation and class-switching compared to anti-repeat mAbs, live sporozoite binding and inhibitory activity was limited to a single C-linker reactive mAb with cross-reactivity to the central repeat and junction. The data provide novel insights in the human anti-C-linker and anti-α-TSR antibody response that support exclusion of the PfCSP C terminus from malaria vaccine designs.
Development of Advanced Polymeric Reflector for CSP Applications - Final Report
This project attempted to deposit extremely thick and dense protective barrier onto a mirror film stack with a PET substrate. The target thickness was very high for thin film products; particularly since large areas and long production lengths of film are needed to make the final product economic. The technical investigations in this project centered on maintaining a quality barrier (i.e. dense film) while evaporating alumina with a high deposition rate onto a low cost PET substrate. The project found that the proposed configuration, particularly direct ion bombardment, provides too narrow a solution space to effectively and economically produce the ASRM attempted. The initial project goals were met when depositing on a limited width and at a modest rate. However, expanding to wide deposition at aggressive deposition rates did not produce consistent film quality. Economic viability drives the process to maximize deposition rate. The current system configuration has a limiting upper rate threshold that does not appear economically viable. For future work, alternate approaches seem needed to address the challenges encountered in the scale-up phase of this project.
Development of a High-Concentration, Low-Cost Parabolic Trough System for Baseload CSP Generation (Phase II Final Report)
The SkyTrough DSP will advance the state-of-the-art in parabolic troughs for utility applications, with a larger aperture, higher operating temperature, and lower cost. The goal of this project was to develop a parabolic trough collector that enables solar electricity generation in the 2020 marketplace for a 216MWe nameplate baseload power plant. This plant requires an LCOE of 9¢/kWhe, given a capacity factor of 75%, a fossil fuel limit of 15%, a fossil fuel cost of $\$$6.75/MMBtu, $\$$25.00/kWht thermal storage cost, and a domestic installation corresponding to Daggett, CA. The result of our optimization was a trough design of larger aperture and operating temperature than has been fielded in large, utility scale parabolic trough applications: 7.6m width x 150m SCA length (1,118m 2 aperture), with four 90mm diameter × 4.7m receivers per mirror module and an operating temperature of 500°C. The results from physical modeling in the System Advisory Model indicate that, for a capacity factor of 75%: The LCOE will be 8.87¢/kWhe. SkyFuel examined the design of almost every parabolic trough component from a perspective of load and performance at aperture areas from 500 to 2,900m 2 . Aperture-dependent design was combined with fixed quotations for similar parts from the commercialized SkyTrough product, and established an installed cost of $\$$130/m 2 in 2020. This project was conducted in two phases. Phase I was a preliminary design, culminating in an optimum trough size and further improvement of an advanced polymeric reflective material. This phase was completed in October of 2011. Phase II has been the detailed engineering design and component testing, which culminated in the fabrication and testing of a single mirror module. Phase II is complete, and this document presents a summary of the comprehensive work.
Solar Driven Supercritical CO 2 Brayton Cycle Testing (CSP)
Sandia National Laboratories (SNL) provided design, modeling, and analysis to support Commonwealth Scientific and Industrial Research Organization's (CSIRO's) efforts to develop a receiver system for solarized supercritical CO 2 (SCO@) Brayton cycles. A solarized sCO2 power cycle is being pursued by both the U.S. DOE and the Australian government as a means to enable renewable, dispatchable electricity with low costs and high efficiency, which will improve reliability and resiliency of both nations' energy grids. Results of this work provided annualized thermal efficiencies for an intermediate-scale falling particles receiver that can be used as the basis for a direct sCO2 receiver design that is being pursued by CSIRO. In addition, different particle-receiver configurations were analyzed to investigate large-scale designs up to ~100 MW e .
High Efficiency Thermal Energy Storage System for Concentrated Solar Power (CSP)
Abstract not provided
High Temperature Abrasion Erosion Testing for Particle Based CSP Systems
In this work, we demonstrate an experimental setup that would allow us to individually control each variable that could influence abrasion erosion. Subsequently, Abrasion measurements were performed for three different candidate substrate materials at low particle velocities and both low and high temperatures.
NSTTF Gen 3 Topic 1 CSP Liquid-Pathway to SunShot Pipe Preheating System Comparison Report
The primary objective of this report is to determine a viable pipe preheating system for a chloride-salt blend that can preheat the pipe to 450°C and withstand a maximum exposure temperature of 750°C. Preheating involves heating the pipe to a specific desired temperature, called preheat temperature, of the pipe. The temperature is maintained by heated molten salt flowing through the piping system. This report reviews 5-types of pipe preheating systems, of which three pipe preheating systems- MI cable, heat tape, and ceramic fiber heaters, were found to be viable for the Gen 3 Liquid Pathway application. The report reviews the pipe preheating efficiency of conduction verses radiant heat transfer. For each of the 5 types of pipe preheating systems, the report describes the system and addresses installation requirements, temperature control, reliability survey, and pre-construction verification testing for the most applicable preheating system. Under Appendix A, images from design drawings demonstrate pipe routing with the preheating system and insulation attached to the pipe along with pipe guides and pipe supports, as designed using Caesar II finite element analysis within the SNL NSTTF Solar Power Tower.
NSTTF Gen 3 Topic 1 CSP Liquid-Pathway to SunShot. Heat Trace Options Report
The primary objective of this report is to determine a viable pipe preheating system for a chloridesalt blend (40%MgCl2/20%NaCl/40%KCI) that can preheat the pipe to 450 °C and withstand a maximum exposure temperature of 740 °C. Preheating involves heating the pipe to a specific desired temperature, called preheat temperature, of the pipe. The temperature is maintained by heated molten salt flowing through the piping system. This report reviews 5-types of pipe preheating systems, of which three pipe preheating systems- MI cable, heat tape, and ceramic fiber heaters, were found to be viable for the Gen 3 Liquid Pathway application. The report reviews the pipe preheating efficiency of conduction verses radiant heat transfer. For each of the 5 types of pipe preheating systems, the report describes the system and addresses installation requirements, temperature control, reliability survey, and pre-construction verification testing for the most applicable preheating system. Under Appendix A, images from design drawings demonstrate pipe routing with the preheating system and insulation attached to the pipe along with pipe guides and pipe supports, as designed using Caesar II finite element analysis within the SNL NSTTF Solar Power Tower.
Simplified High-Temperature Molten Salt CSP Plant Preconceptual Design
State of the art concentrating solar power plants generally rely on a two-tank system with a large central tower. These plants employ nitrate salts that are limited to approximately 565°C in practice. A novel system arrangement is proposed using molten salt as the heat transfer and energy storage media in a single thermocline storage tank with an integral heat exchanger to the power cycle. The system has unique features that enable temperatures higher than 565°C while reducing costs. This study explores the considerations for the concept and presents a preconceptual point design for a 5 MWt system capable of generating 100 MWt per day with 12 hours of thermal energy storage. This study also examines the potential operation of the system with nitrate and higher temperature chloride salts. Both salt systems appear promising and future concept maturation is recommended.
Estimating the Value of Automation for CSP Industry Operations.
Abstract not provided.