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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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Material inputs for retrofitting an existing pulverized coal (EXPC) power plant with carbon capture and sequestration (CCS). To access the model referenced in the report, please visit https://www.netl.doe.gov/energy-analysis/details?id=03FD6C0E-5DA6-4455-9374-78A247D946BB
Exciton-phonon coupling (EXPC) plays a key role in the optoelectronic properties of semiconductor nanocrystals (NCs), but a microscopic picture of EXPC is still lacking, particularly regarding the magnitude and scaling with NC size, the dependence on phonon frequency, and the role of the NC surface. The computational complexity associated with accurately describing excitons and phonons has limited previous theoretical studies of EXPC to small NCs, noninteracting electron-hole models, and/or a small number of phonon modes. We develop an atomistic approach for describing EXPC in NCs of experimentally relevant sizes. We validate our approach by calculating the reorganization energies, a measure of EXPC, for CdSe and CdSe-CdS core-shell NCs, finding good agreement with experimental measurements. We demonstrate that exciton formation distorts the NC lattice primarily along the coordinates of low-frequency acoustic modes. Modes at the NC surface play a significant role in smaller NCs while interior modes dominate for larger systems.
The Power Systems L-CAT is a high-level dynamic model that calculates levelized production costs and tracks environmental performance for a range of electricity generation technologies: natural gas combined cycle (using either imported (LNGCC) or domestic natural gas (NGCC)), integrated gasification combined cycle (IGCC), supercritical pulverized coal (SCPC), existing pulverized coal (EXPC), nuclear, and wind. All of the fossil fuel technologies also include an option for including carbon capture and sequestration technologies (CCS). The model allows for quick sensitivity analysis on key technical and financial assumptions, such as: capital, O&M, and fuel costs; interest rates; construction time; heat rates; taxes; depreciation; and capacity factors. The fossil fuel options are based on detailed life cycle analysis reports conducted by the National Energy Technology Laboratory (NETL). For each of these technologies, NETL's detailed LCAs include consideration of five stages associated with energy production: raw material acquisition (RMA), raw material transport (RMT), energy conversion facility (ECF), product transportation and distribution (PT&D), and end user electricity consumption. The goal of the NETL studies is to compare existing and future fossil fuel technology options using a cradle-to-grave analysis. The NETL reports consider constant dollar levelized cost of delivered electricity, total plant costs, greenhouse gas emissions, criteria air pollutants, mercury (Hg) and ammonia (NH3) emissions, water withdrawal and consumption, and land use (acreage).
The operations of an existing pulverized coal (EXPC) power plant with or without carbon capture and sequestration (CCS) on the basis of 1MWh electricity output. To access the model referenced in the report, please visit https://www.netl.doe.gov/energy-analysis/details?id=4EDA9298-2B77-4320-B48E-DEE007352794
Presentation for life cycle analysis compilation of the power LCA reports. Develops an inventory of emissions results, and calculates life cycle costs for each plant with and without CCS.
Presentation for life cycle analysis compilation of the Power LCA Reports. Develops an inventory of emissions results, and calculates life cycle costs for each plant with and without CCS.
Presentation for life cycle analysis compilation of the power LCA reports. Develops an inventory of emissions results, and calculates life cycle costs for each plant with and without CCS.