A common way to mitigate ammonia gas releases is to apply water spray curtains. It is a proven method, but since gaseous ammonia is invisible, it is difficult to direct and evaluate the effectivity of such actions. During an actual release event at a scanfeld monitored site the fire brigade was alerted and directed to the area.

Scanfeld visualizes the situation before, during, and after applying the water curtain. The gas concentration is overlaid in bright colors on b/w video stills. With the main wind direction from left to right, scanfeld shows how the ammonia cloud is effectively stopped by the water curtain.

The sequence of images is taken with about 8 min distance.

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