HGSYSTEM: Dispersion models for ideal gases and hydrogen fluoride tutorial and quick reference guide
- Shell Research Ltd., Chester (United Kingdom). Thornton Research Centre
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.
- Research Organization:
- 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 Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC08-88NV10617
- OSTI ID:
- 10179309
- Report Number(s):
- EGG-10617-1150; ON: DE93000952; IN: TNER-91-007
- Resource Relation:
- Other Information: PBD: May 1991
- Country of Publication:
- United Kingdom
- Language:
- English
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