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Title: HGSYSTEM: Dispersion models for ideal gases and hydrogen fluoride tutorial and quick reference guide

Abstract

The thermodynamic behavior of hydrogen fluoride when diluted with air, particularly moist air, is very different from that of a simple ideal gas. The gas-air mixture can, depending on conditions, be denser than ambient air or substantially less dense than air. This behavior of an HF cloud would have a major influence on the dispersion behavior of HF in the atmosphere if it were released accidentally. For gases such as LNG thermodynamic effects must be included in dispersion models in order to accurately simulate such releases. Because of the unique thermodynamic properties of HF, it was felt that those properties would be important in accurately simulating an HF release. This program identified three major areas in which substantial uncertainties existed in previous models: (1) the modeling of the complex thermodynamics of HF/H{sub 2}O/Air mixtures (including aerosol effects on cloud density); (2) the treatment of a wide range of surface roughness conditions (including possible multiple surface roughness conditions) and (3) jet flow and air entrainment for pressurized releases of HF, followed by transition to ground-based dense gas dispersion. Major objectives of this study were to develop and validate computer-based models to calculate the release properties in addition to simulating jet andmore » plume behavior downwind of an accidental release of HF. This report serves as a guide to the installation and operation of the HGSYSTEM model.« less

Authors:
 [1]
  1. Shell Research Ltd., Chester (United Kingdom). Thornton Research Centre
Publication Date:
Research Org.:
EG and G Energy Measurements, Inc., Las Vegas, NV (United States); Industry Cooperative Hydrogen Fluoride Mitigation/Assessment Program (United States). Ambient Impact Assessment Subcommittee; Shell Research Ltd., Chester (United Kingdom). Thornton Research Centre
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
10179309
Report Number(s):
EGG-10617-1150
ON: DE93000952; IN: TNER-91-007
DOE Contract Number:  
AC08-88NV10617
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: May 1991
Country of Publication:
United Kingdom
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; 99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE; HYDROFLUORIC ACID; ENVIRONMENTAL TRANSPORT; EVAPORATION; MIXING; H CODES; AIR; COMPUTER PROGRAM DOCUMENTATION; THERMODYNAMICS; MANUALS; PLUMES; ACCIDENTS; OPERATION; INSTALLATION; COMPUTERS; AEROSOLS; 540120; 990200; CHEMICALS MONITORING AND TRANSPORT; MATHEMATICS AND COMPUTERS

Citation Formats

Witlox, H W.M.. HGSYSTEM: Dispersion models for ideal gases and hydrogen fluoride tutorial and quick reference guide. United Kingdom: N. p., 1991. Web.
Witlox, H W.M.. HGSYSTEM: Dispersion models for ideal gases and hydrogen fluoride tutorial and quick reference guide. United Kingdom.
Witlox, H W.M.. Wed . "HGSYSTEM: Dispersion models for ideal gases and hydrogen fluoride tutorial and quick reference guide". United Kingdom.
@article{osti_10179309,
title = {HGSYSTEM: Dispersion models for ideal gases and hydrogen fluoride tutorial and quick reference guide},
author = {Witlox, H W.M.},
abstractNote = {The thermodynamic behavior of hydrogen fluoride when diluted with air, particularly moist air, is very different from that of a simple ideal gas. The gas-air mixture can, depending on conditions, be denser than ambient air or substantially less dense than air. This behavior of an HF cloud would have a major influence on the dispersion behavior of HF in the atmosphere if it were released accidentally. For gases such as LNG thermodynamic effects must be included in dispersion models in order to accurately simulate such releases. Because of the unique thermodynamic properties of HF, it was felt that those properties would be important in accurately simulating an HF release. This program identified three major areas in which substantial uncertainties existed in previous models: (1) the modeling of the complex thermodynamics of HF/H{sub 2}O/Air mixtures (including aerosol effects on cloud density); (2) the treatment of a wide range of surface roughness conditions (including possible multiple surface roughness conditions) and (3) jet flow and air entrainment for pressurized releases of HF, followed by transition to ground-based dense gas dispersion. Major objectives of this study were to develop and validate computer-based models to calculate the release properties in addition to simulating jet and plume behavior downwind of an accidental release of HF. This report serves as a guide to the installation and operation of the HGSYSTEM model.},
doi = {},
url = {https://www.osti.gov/biblio/10179309}, journal = {},
number = ,
volume = ,
place = {United Kingdom},
year = {1991},
month = {5}
}

Technical Report:
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