SEARCH · Engineering Papers
Results for “life cycle”
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.
Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.
Enhanced Long-Term Cycling Life of Ni-Rich NMC Cathodes in High-Voltage Lithium–Metal Batteries
Not provided.
Composite Cathode Design for High-Energy All-Solid-State Lithium Batteries with Long Cycle Life
Not Available
Implications of CO 2 Sourcing on the Life-Cycle Greenhouse Gas Emissions and Costs of Algae Biofuels
Not Available
A Climatology and Life‐Cycle Characteristics of Atmospheric Fronts and Their Associated Precipitation
Abstract Atmospheric fronts are one of the main sources of mid‐latitude variability. We employ a novel method for identifying and tracking fronts and frontal precipitation. Thermal and dynamical variables are used to identify fronts as areal objects in space, which are tracked in time using the open‐source TempestExtremes software package. Precipitation objects are co‐located to identify frontal precipitation. The method is subjected to validation and sensitivity tests using manually curated data from the National Weather Service. Climatologies of fronts and frontal precipitation are computed from reanalysis and observations; fronts are present upwards of 14% of the time in the storm tracks, and represent the majority (up to 90%) of total and extreme precipitation. Novel aspects of the method are showcased through the lifetime characteristics of fronts across North America. Three sets of warm and cold fronts were discovered, and their duration, distance‐traveled, and translation velocity are examined. Plain Language Summary Mid‐latitude low‐pressure systems and weather fronts are important for our day‐to‐day experience of weather events, particularly in the mid‐latitudes. This work makes use of standardized atmospheric data and creates a method of automatically tracking these important atmospheric features and their precipitation to quantify their relative role in global precipitation. Weather fronts are persistent in the mid‐latitudes and are associated with the majority of precipitation–particularly the most intense precipitation. Trajectories of fronts over North America are categorized to create a set of archetypal fronts that occur in that region. The differences between these types of fronts are characterized. Key Points An automated, efficient, and skillful frontal detection algorithm is developed and validated Fronts contribute a larger fraction of extreme precipitation than all precipitation in mid‐latitude storm tracks Fronts across North America have substantial variation in characteristics depending on their origin location
Anaerobic methanotroph ‘Candidatus Methanoperedens nitroreducens’ has a pleomorphic life cycle
Not provided.
Human and environmental safety of carbon nanotubes across their life cycle
Not provided.
Rechargeable Aqueous Zn2+-Battery with High Power Density and Long Cycle-life
Explore the source record for details and available documents.
Techno-economic analysis and life cycle assessment of a biorefinery utilizing reductive catalytic fractionation
Analysis of a promising lignin-first biorefining technique, reductive catalytic fractionation, provides useful metrics for cost and sustainability to guide researchers toward critical areas for improvement.
Techno-economic analysis and life cycle assessment for catalytic fast pyrolysis of mixed plastic waste
This study analyzes catalytic fast pyrolysis as a conversion technology for mixed plastic waste, highlighting key economic and environmental drivers and potential opportunities for process improvements.
Techno-economic analysis and life cycle assessment of mixed plastic waste gasification for production of methanol and hydrogen
This work examines the feasibility of a greenfield mixed plastics waste gasification facility with process modeling, TEA, and LCA.
Comparative techno-economic and life-cycle analysis of precious versus non-precious metal electrocatalysts: the case of PEM fuel cell cathodes
Fe–N–C catalyst production outperforms Pt/C from an enviro-economic viewpoint, but further Fe–N–C activity development is required before deployment in PEMFCs.
A sustainable aviation fuel pathway from biomass: life cycle environmental and cost evaluation for dimethylcyclooctane jet fuel
Biomass is a promising renewable feedstock for conversion to high performance sustainable aviation fuel (SAF) to mitigate greenhouse gas emissions in air travel.
The life cycle land use of natural gas-fired electricity in the US Western interconnection
Land presents a critical yet often overlooked constraint to energy development.
Life cycle assessment of formic acid synthesis utilizing CO 2 from direct air capture
Formic acid synthesis from direct air captured CO 2 utilizing waste heat shows significant reductions in environmental impacts over conventional methods.
Modulation of CHT7 Complexes during Light/Dark- and Nitrogen-Mediated Life Cycle Transitions of Chlamydomonas
Not Available