Modeling of Releases from Ammonia Refrigeration Pressure Rel
Modeling of Releases from Ammonia Refrigeration Pressure Relief Valves Usinig Dispersion Modeling Software (2014)-Sophisticated software is available commercially to model outdoor dispersion of pure gases such as ammonia from pressure relief valves, or ammonia-air mixtures from machinery room ventilation systems. A previous paper presented in 2013 provided a case study of using this software to model ammonia releases from inside an ammonia machinery room, or from piping or vessel leak points outdoors near ground level [1]. In this paper, the author applies the same analysis techniques to outdoor pressure relief discharges from single relief valves, discharge headers, and water diffusion tank vents. The analysis examines the impact of decisions such as release orientation (up or horizontal),discharge velocity, discharge elevation, etc.
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