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A simple model of gas flow in a porous powder compact

Shugard, Andrew D.; Robinson, David

This report describes a simple model for ideal gas flow from a vessel through a bed of porous material into another vessel. It assumes constant temperature and uniform porosity. Transport is treated as a combination of viscous and molecular flow, with no inertial contribution (low Reynolds number). This model can be used to fit data to obtain permeability values, determine flow rates, understand the relative contributions of viscous and molecular flow, and verify volume calibrations. It draws upon the Dusty Gas Model and other detailed studies of gas flow through porous media.

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TYPE SAND Report YEAR 2014
DOIOSTI

Using XFRACAS as a PVROM database tool

Hamman, Colin J.

ReliaSofts XFRACAS is a tool chosen by Sandia National Laboratories (SNL) for the purpose of collecting and organizing photovoltaic (PV) system field data that is to be used in assessing PV system reliability. It is a Web-based, closed-loop, incident (failure) reporting, analysis, and corrective action system software package designed for the acquisition, management and analysis of quality and reliability data from multiple sources. The ability to export PV system times-to-failure and times-to-suspension for ready analysis by ReliaSofts Weibull++ and RGA was a primary consideration in choosing XFRACAS as a reliability data collection tool.

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TYPE SAND Report YEAR 2014
DOIOSTI

Safety, codes and standards for hydrogen installations. Metrics development and benchmarking

Dedrick, Daniel E.; Lafleur, Angela (Chris); San Marchi, Chris

Automakers and fuel providers have made public commitments to commercialize light duty fuel cell electric vehicles and fueling infrastructure in select US regions beginning in 2014. The development, implementation, and advancement of meaningful codes and standards is critical to enable the effective deployment of clean and efficient fuel cell and hydrogen solutions in the energy technology marketplace. Metrics pertaining to the development and implementation of safety knowledge, codes, and standards are important to communicate progress and inform future R&D investments. This document describes the development and benchmarking of metrics specific to the development of hydrogen specific codes relevant for hydrogen refueling stations. These metrics will be most useful as the hydrogen fuel market transitions from pre-commercial to early-commercial phases. The target regions in California will serve as benchmarking case studies to quantify the success of past investments in research and development supporting safety codes and standards R&D.

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TYPE SAND Report YEAR 2014
DOIOSTI
Results 53401–53600 of 99,299
Results 53401–53600 of 99,299